https://hdl.handle.net/1721.1/79431 2026-04-08T11:45:56Z 2026-04-08T11:45:56Z Matthews, Lynn D. Crew, G. B. Fish, Vincent https://hdl.handle.net/1721.1/165054 2026-03-06T03:01:04Z 2017-03-28T00:00:00Z

Summary of the Fourth ALMA Phasing Project (APP) Commissioning and Science Verification Mission: 2016 April 3-8 Matthews, Lynn D.; Crew, G. B.; Fish, Vincent The primary objectives of the fourth APP CSV campaign were twofold: (1) to execute Very Long Baseline Interferometry (VLBI) observing mode (VOM) observations using Schedule Blocks (SBs); (2) to carry out the first end-to-end testing of intercontinental VLBI sessions in both Bands 3 and 6. While intercontinental VLBI fringes with ALMA have already been obtained during previous CSV campaigns (Matthews & Crew 2016b, c), those sessions were not conducted in a manner identical to future VLBI science campaigns (i.e., they used manual execution of observing commands rather than SBs) and did not involve observations of a full suite of ALMA and VLBI calibrators. Secondary objectives of the fourth CSV mission included further development work on an ALMA Phasing System (APS) graphical user interface (GUI), additional testing of the fast phasing loop (under a wider variety of weather conditions), tests of the phasing system in Band 7 (in support of an ongoing North America ALMA Study award), and the training of ALMA staff in the operation of the VOM and the APS hardware and software. This is a report of the activities of this campaign. This report was prepared to report on APP commissioning progress, provided as ALMA Technical Note #19.

2017-03-28T00:00:00Z Matthews, Lynn D. Crew, G. B. https://hdl.handle.net/1721.1/165053 2026-03-06T03:01:12Z 2015-09-14T00:00:00Z

Summary of the Third ALMA Phasing Project (APP) Commissioning and Science Verification Mission: 2015 July 28-August 3 Matthews, Lynn D.; Crew, G. B. The primary objective for the third APP CSV campaign was to perform intercontinental Very Long Baseline Interferometry (VLBI) fringe tests between phased ALMA and remote stations in Band 3, Band 6, and (conditions permitting) Band 7. Secondary objectives included preparations for making the APS available to the community for ALMA Cycle 4 and training ALMA staff in the operation of the ALMA Phasing System (APS). This is a report of those activities. This report was prepared to report on APP commissioning progress, provided as ALMA Technical Note #18.

2015-09-14T00:00:00Z Matthews, Lynn D. Crew, G. B. https://hdl.handle.net/1721.1/165052 2026-03-06T03:01:14Z 2015-09-04T00:00:00Z

Summary of the Second ALMA Phasing Project (APP) Commissioning and Science Verification Mission: 2015 March 24-30 Matthews, Lynn D.; Crew, G. B. The primary objective for the second APP CSV campaign was to test and characterize the phasing system, including the recent changes in the handling of the front-end delays. Secondary goals were to repeat the local VLBI test between ALMA and an antenna at the Operations Support Facility (OSF) (also attempted during the January mission) and to obtain a short VLBI recording on a calibrator source with ALMA and one or more stations operating as part of the Event Horizon Telescope (EHT) network, thus allowing demonstration of an intercontinental VLBI fringe. This is a report of the week's activities. This report was prepared to report on APP commissioning progress, provided as ALMA Technical Note #17.

2015-09-04T00:00:00Z Matthews, Lynn D. Crew, G. B. https://hdl.handle.net/1721.1/165051 2026-03-06T03:01:08Z 2015-03-29T00:00:00Z

Summary of the First ALMA Phasing Project (APP) Commissioning and Science Verification Mission: 2015 January 6-13 Matthews, Lynn D.; Crew, G. B. The first Commissioning and Science Verification (CSV) mission for the ALMA Phasing Project (APP) took place during the ALMA EOC Week from 2015 January 6-13. The formal commencement of APP CSV activities followed the provisional acceptance of the APP hardware during a formal review by JAO that took place on 2014 December 11. This is a report of activities during the week. This report was prepared to report on APP commissioning progress, provided as ALMA Technical Note #16.

2015-03-29T00:00:00Z Matthews, Lynn D. Crew, G. Hecht, M. H. https://hdl.handle.net/1721.1/165050 2026-03-06T03:01:06Z 2018-09-01T00:00:00Z

ALMA North America Cycle 4 Study Project Final Report: Diversifying the Applications of the ALMA Phasing System Matthews, Lynn D.; Crew, G.; Hecht, M. H. The Atacama Millimeter/submillimeter Array (ALMA) Phasing Project (APP) produced the hardware and software modifications necessary to bring Very Long Baseline Interferometry (VLBI) capabilities to ALMA. The resulting VLBI observing mode was introduced to the science community in ALMA Cycle 4 (2017), and two VLBI science campaigns have now been carried out successfully at ALMA. The current Cycle 4 ALMA North America (NA) Study was proposed to lay the groundwork for a variety of enhancements to the ALMA Phasing System (APS) that were not within the scope of the original APP project. These include: (1) devising an improved method for the handling of baseband delays; (2) development of procedures for use of the APS on fainter astronomical sources than is presently possible; (3) development of data acquisition and correlation techniques to allow the APS to be used for spectral line VLBI experiments. These tasks were intended as preparatory steps for a future full-scale implementation project (if approved). Formal approval of this implementation work has now been granted and is funded through an ALMA Cycle 5 NA Development project known as APP “Phase 2” (APP-2). As a result, efforts to implement capabilities designed and explored under the current Cycle 4 Study, as well as a previous Cycle 3 Study award, are now underway. This report provides a status summary of Cycle 4 activities and outlines follow-on work that is continuing as part of the ongoing Cycle 5 Development efforts.

2018-09-01T00:00:00Z Matthews, L. Crew, G. Hecht, M. H. https://hdl.handle.net/1721.1/165049 2026-03-06T03:01:09Z 2018-05-01T00:00:00Z

ALMA North America Cycle 3 Study Project Final Report: Extensions and Enhancements to the ALMA Phasing System Matthews, L.; Crew, G.; Hecht, M. H. The Atacama Millimeter/submillimeter Array (ALMA) Phasing Project (APP) has successfully brought Very Long Baseline Interferometry (VLBI) to ALMA. Nine VLBI science projects were observed in 2017 during ALMA’s in augural VLBI campaign as part of Cycle 4. This marked the culmination of an international 5-year effort that involved both hardware and software contribu- tions from the APP Team to the ALMA Observatory. A Cycle 3 ALMA North America (NA) Study was proposed to enable ongoing support of VLBI at ALMA and the investigation of enhancements to the ALMA Phasing System (APS) that were not within the scope of the original APP project. These included: (1) an extension of phasing capabilities to the submilleter (Band 7); (2) an exploration of correlation techniques to compensate for the mismatch in sampling rates between ALMA and other VLBI stations; (3) prescriptions for optimization of ALMA baseband delay application; (4) defining and documenting data calibration and analysis pathways for experiments utilizing phased ALMA data. This report summarizes outcomes from the Cycle 3 Study. Work on the APP remains ongoing under a Cycle 4 Study award and will continue under a pending ALMA NA Cycle 5 Development Project that is expected to enable full implementation of the capabilities explored under the Cycle 3 and Cycle 4 Studies.

2018-05-01T00:00:00Z Cordes, James Blackburn, Lindy Chatterjee, Shami Crew, Geoffrey Devignes, Gregory Doeleman, Shep Kramer, Michael Lazio, Joe Liu, Kuo Ransom, Scott https://hdl.handle.net/1721.1/165048 2026-03-06T03:01:05Z 2017-10-01T00:00:00Z

Pulsars, Magnetars, and Transients with Phased ALMA, Final Report Cordes, James; Blackburn, Lindy; Chatterjee, Shami; Crew, Geoffrey; Devignes, Gregory; Doeleman, Shep; Kramer, Michael; Lazio, Joe; Liu, Kuo; Ransom, Scott The present study developed fast time-domain capability for the ALMA phased-array system that is needed for observations of compact objects in the Galactic center and elsewhere in the Galaxy. ALMA can provide unparalleled sensitivity to a spectral region that has been poorly explored for neutron stars. Observations at mm and sub-mm wavelengths have the potential for providing decisive observational constraints on emission processes from the magnetospheres of neutron stars. ALMA is also important for surveys for pulsars and transients in the Galactic center. This is a final report of the work performed.

2017-10-01T00:00:00Z Matthews, Lynn D. https://hdl.handle.net/1721.1/165047 2026-03-06T03:01:10Z 2017-05-24T00:00:00Z

Final Report: ALMA Phasing Project Augmentation Matthews, Lynn D. This report provides a summary of activities carried out under the NA ALMA Development Fund award to augment the National Science Foundation MRI award for the ALMA Beamformer proposal, performed as the ALMA Phasing Project.

2017-05-24T00:00:00Z Matthews, Lynn D. https://hdl.handle.net/1721.1/165046 2026-03-06T03:01:11Z 2016-12-12T00:00:00Z

MRI: Development of an ALMA Beamformer for Ultra High Resolution VLBI and High Frequency Phased Array Science Matthews, Lynn D. This is the final report covering the activities of the National Science Foundation MRI Award number 1126433.

2016-12-12T00:00:00Z Crew, Geoffrey B. Matthews, Lynn D. https://hdl.handle.net/1721.1/165045 2026-03-06T03:01:07Z 2024-08-20T00:00:00Z

Cycle 11 VLBI Acceptance: Delay Fix Final Report Crew, Geoffrey B.; Matthews, Lynn D. This report presents details of changes to the VLBI software system made on the path to the Cycle 11 Acceptance. The principal new feature is the long-awaited "delay fix" to the APS that is presented in considerable detail here. This was proposed for a new ADF implementation project, APP2. The delay fix is a technology that allows the full 2-GHz continuum band to be used in active phasing, resulting results in a lower flux density limit for direct observation of science targets. It also allows a greater range of passive phasing targets to support weaker targets. Work on the delay fix began during Cycle 3 and is only now concluded in time for additional testing as desired in Cycle 11 and then full use in Cycle 12. Other than the delay fix, a new software device was delivered to support the new hydrogen maser, and there was the usual round of minor scripting updates in the SSR component. This report is written to present a largely self-contained history of the delay fix effort and its fruit, and it also covers the other, minor development items which are formally part of the Cycle 11 Acceptance. As the software phasing engine which supports this mode is also now the recommended engine for the APS, this document also serves to present relatively complete documentation on the final implementation of the SSR as well as TelCal sides of the APS. The underlying VOM remains as it was deployed and used in Cycle 4.

2024-08-20T00:00:00Z Matthews, Lynn D. Crew, Geoff Fish, Vincent Messias, Hugo Titus, Mike Krichbaum, Thomas https://hdl.handle.net/1721.1/165044 2026-03-06T03:01:13Z 2022-11-04T00:00:00Z

ObsMode2022 Cycle 10 Go/No-Go Report for VLBI Capabilities Matthews, Lynn D.; Crew, Geoff; Fish, Vincent; Messias, Hugo; Titus, Mike; Krichbaum, Thomas We present here a report on the Very Long Baseline Interferometry (VLBI) development efforts under consideration at ALMA as new offerings in Cycle 10. These activities are being carried out under the ALMA North America Development Project known as the ALMA Phasing Project Phase 3 (APP3). The two VLBI priorities previously identified for Cycle 10 by the ObsMode process are: (1) spectral line VLBI with flexible tuning; (2) panchromatic VLBI for spectral line and continuum (Bands 1, 3, 6 and 7, with provisions for extension to any other band). This document provides an overview of the development, testing, and readiness of these capabilities. Some updates on minor development efforts are also provided. This report was prepared for the formal acceptance of the software required for Cycle 10. Notionally it is ALMA Technical Note #25, but not published (yet) as such.

2022-11-04T00:00:00Z Crew, Geoff Vila-Vilaro, Baltasar https://hdl.handle.net/1721.1/165043 2026-03-06T03:01:03Z 2022-02-09T00:00:00Z

Cycle 8 (2021–2022) VLBI Delta Acceptance Report Crew, Geoff; Vila-Vilaro, Baltasar This report summarizes the acceptance process for VLBI which was carried out in 2021 as part of the normal Cycle 8 Acceptance and later, through the 2021–2022 preparations for the 2022 VLBI Campaigns. It reviews the hardware setup and checks that must be made at various times prior to any observations with VLBI peers. Then there is a suite of offline tests of the SB-generation that include observation simulation. There is also a suite of on-sky regression tests that exercise the ALMA Phasing System (APS). The final step of the acceptance has historically been the execution of a short “dress rehearsal” (DR) usually in January of the cycle year with the Event Horizon Telescope (EHT) to provide end-to-end validation of the system via fringes to remote peers. Collectively these tests establish that the science VLBI projects may proceed without issue. This report was prepared for the formal acceptance of the software required for Cycle 8. Notionally, it is ALMA Technical Note #24, but not published (yet) as such.

2022-02-09T00:00:00Z Matthews, Lynn D. Crew, Geoff Goddi, Ciriaco Marti-Vidal, Ivan Titus, Mike Fish, Vincent Wagner, Jan Rottmann, Helge Pridiprihora, Yurii Krichbaum, Thomas Liu, Kuo Kramer, Michael https://hdl.handle.net/1721.1/165018 2026-03-05T18:45:41Z 2021-10-26T00:00:00Z

ObsMode2021 Cycle 9 Go/No-Go Report for VLBI Capabilities Matthews, Lynn D.; Crew, Geoff; Goddi, Ciriaco; Marti-Vidal, Ivan; Titus, Mike; Fish, Vincent; Wagner, Jan; Rottmann, Helge; Pridiprihora, Yurii; Krichbaum, Thomas; Liu, Kuo; Kramer, Michael We present a status summary of the primary Very Long Baseline Interferometry (VLBI) development efforts which are under consideration at ALMA as new offerings in Cycle 9. These activities are being carried out under the ALMA North America Development Project known as the ALMA Phasing Project Phase 2 (APP2). The two VLBI priorities previously identified for Cycle 9 by the ObsMode process are: (1) a submillimeter (Band 7) VLBI observing capability and (2) a prototype spectral line VLBI mode (in Band 3 only). This document provides an overview of the development, testing, and readiness of these capabilities. Updates on other APP2 development efforts of relevance for future cycles, including the phased-array mode offered for the first time in Cycle 8, are also provided. Warning: This report contains material that is considered proprietary to the Event Horizon Telescope Collaboration (EHTC). These results may not be publicly posted, cited, or shared in any form. They are presented here with permission from EHTC Management solely for the purpose of allowing an evaluation of ALMA's performance as a VLBI station for 345 GHz (Band 7) VLBI. This report also contains ALMA EOC (test) data which are subject to ALMA's standard policies on the use of such data. We are working to ensure that the EHTC follows the ALMA guidelines (Carpenter et al., 2019) in the appropriate publication and release of data to allow follow-up work for science. This report was prepared for the formal acceptance of the software required for Cycle 9. Notionally it is ALMA Technical Note #23, but not published (yet) as such.

2021-10-26T00:00:00Z Matthews, Lynn D. Crew, Geoffrey B. https://hdl.handle.net/1721.1/164885 2026-03-19T03:15:26Z 2019-11-21T00:00:00Z

APP2 Status Summary: Proposed New VLBI Capabilities for Cycle 8 Matthews, Lynn D.; Crew, Geoffrey B. This document contains material regarding the new capabilities proposed for ALMA Cycle 8. These included a passive phasing mode (for weaker sources), an ALMA Band 3 pulsar observing mode, a prototype spectral line mode, also for Band 3, and minor improvements to the code for operational reasons. In the event, the first two were accepted for a Cycle 8 that was delayed by the COVID-19 pandemic. The spectral line capability was deferred until Cycle 9. In response to reviewer questions, a modified figure was prepared and presented as an addendum. Both documents are presented here as a single PDF. This report was prepared for the formal acceptance of the software required for Cycle 8. Notionally it is ALMA Technical Note #21, but not (yet) published as such.

2019-11-21T00:00:00Z Matthews, Lynn D. Crew, Geoffrey B. https://hdl.handle.net/1721.1/164884 2026-03-04T18:34:05Z 2024-07-19T00:00:00Z

Final Report: Enabling New VLBI Science with the ALMA Phasing System - Phase 3 (APP3): An ALMA North America Development Project Matthews, Lynn D.; Crew, Geoffrey B. Executive Summary: This document provides a summary of activities undertaken as part of the ALMA North America Development Project “Enabling New VLBI Science with the ALMA Phasing System - Phase 3 (APP3)”, whose period of performance ex- tended from January 17, 2022 to July 16, 2024. The successful completion of this project has resulted in the introduction of flexible tuning for ALMA very long baseline interfer- ometry (VLBI) operations, a fully flexible spectral line VLBI observing mode, and the enabling of panchromatic VLBI, allowing ALMA in principle to operate as a phased array in any available receiver band. The project also carried out a series of activities aimed at maintaining and optimizing existing VLBI infrastructure and provided training to staff at the Joint ALMA Observatory (JAO) to enable a transition to autonomous VLBI observing. A video feature and accompanying news article were produced near the conclusion of this project to make the results accessible to a broader audience. This report was prepared as a final report on the activities undertaken under the NA Development program mentioned in the abstract.

2024-07-19T00:00:00Z Matthews, L. D. Crew, G. B. https://hdl.handle.net/1721.1/164864 2026-03-04T18:32:50Z 2024-10-18T00:00:00Z

Enabling New Science with the ALMA Phasing System - Phase 2 (APP2): An ALMA North America Development Project Matthews, L. D.; Crew, G. B. This document provides a summary of activities undertaken as part of the Cycle 5 ALMA North America Development Project “Enabling New Science with the ALMA Phasing System - Phase 2 (APP2)”, whose period of performance extended from January 1, 2018 to August 31, 2024. APP2 provided a series of enhancements to ALMA’s very long baseline interferometry (VLBI) and phased array capabilities, leading to the introduction of submillimeter (Band 7) phasing and VLBI capabilities, a passive phasing mode, a Phased Array (pulsar) observing mode, a prototype spectral line VLBI capability, an improved method of handling baseband delays, and a number of other minor system enhancements. This report was prepared as a final report on the activities undertaken under the NA Development program mentioned in the abstract.

2024-10-18T00:00:00Z Crew, Geoff https://hdl.handle.net/1721.1/164721 2026-03-05T18:39:37Z 2020-12-09T00:00:00Z

Cycle 7 VLBI Acceptance Report Crew, Geoff This report summarizes the acceptance process for VLBI which was carried out in early 2020 in preparation for the 2020 VLBI Campaigns. Even though the ALMA operations are suspended, the EHTC campaign has been cancelled, and the GMVA is going forwards without ALMA, it is still a useful exercise to report on the Acceptance testing that was done. This is especially true since (for a variety of reasons) the testing was more extensive this past January. It has also been several years since the initial Acceptance of VLBI for Cycle 4, and new features are finally to become available in Cycle 8, so it is reasonable to capture the state of things at this time. Going forward, it has been suggested as desirable for the Acceptance be added to the normal ALMA Acceptance process. This report thus serves to detail the sort of checks that can and should be made in the future. Some Action items are also noted for the near term. On the bright side, the system was totally ready. This report reviews the setup and on-site checks that can be made in a stand-alone ( no co-observing peers) mode. Then we present results from four VLBI sessions. For each, a CASA reduction is compared with a reduction of the VLBI data which (in three of the four cases) are correlated with participating EHTC sites. This report was prepared for the formal acceptance of the software required for ALMA Observing Cycle 7. Notionally it is ALMA Technical Note #20, but not published (yet) as such.

2020-12-09T00:00:00Z Knapp, Mary Paritsky, Lenny Kononov, Ekaterina Kao, Melodie M. https://hdl.handle.net/1721.1/162807 2025-09-27T03:01:06Z 2024-02-21T00:00:00Z

Great Observatory for Long Wavelengths (GO-LoW) NIAC Phase I Final Report Knapp, Mary; Paritsky, Lenny; Kononov, Ekaterina; Kao, Melodie M.

2024-02-21T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154848 2024-05-07T03:08:58Z 2023-07-25T00:00:00Z

Beam chromaticity of EDGES-3 on lunar regolith Rogers, Alan E.E.

2023-07-25T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154847 2024-05-07T03:30:13Z 2023-06-23T00:00:00Z

Further study of the RFI in data from Devon Island in 2022 Rogers, Alan E.E.

2023-06-23T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154846 2024-05-07T03:50:22Z 2023-04-26T00:00:00Z

Study of further improvements in VNA accuracy Rogers, Alan E.E.

2023-04-26T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154845 2024-05-07T03:02:31Z 2023-01-23T00:00:00Z

Simulation of the effect of a resonant slot on the base plate at the MRO Rogers, Alan E.E.

2023-01-23T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154844 2024-05-07T03:06:35Z 2022-12-13T00:00:00Z

Preliminary analysis of the first EDGES-3 data from the MRO Rogers, Alan E.E.

2022-12-13T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154843 2024-05-07T03:06:14Z 2022-02-02T00:00:00Z

Further optimization of wire grid ground plane Rogers, Alan E.E.

2022-02-02T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154842 2024-05-07T03:15:02Z 2021-11-30T00:00:00Z

Sensitivity of low2-45 averaged over GHA to systematics Rogers, Alan E.E.

2021-11-30T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154831 2024-05-04T03:10:46Z 2024-04-22T00:00:00Z

Analysis of surveys of the 48x48m ground plane taken in November 2022 and March 2024 Rogers, Alan E.E.

2024-04-22T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154830 2024-05-04T03:01:10Z 2024-04-04T00:00:00Z

EDGES-3 RFI filter parameters for absorption data 2023_363 to 2024_087 Rogers, Alan E.E.

2024-04-04T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154829 2024-05-04T03:58:54Z 2024-03-25T00:00:00Z

2018 feature subtraction test on EDGES-3 data from 2023 day 363 to 2024 day 80 Rogers, Alan E.E.

2024-03-25T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154828 2024-05-04T03:21:08Z 2024-03-14T00:00:00Z

Test of using EDGES-3 to observe recombination line spectra below 50 MHz Rogers, Alan E.E.

2024-03-14T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154827 2024-05-04T04:06:21Z 2024-03-05T00:00:00Z

Further examination of 60 MHz resonance at GHA 4 to 6 hours at the WA Rogers, Alan E.E.

2024-03-05T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154826 2024-05-04T04:01:12Z 2024-02-20T00:00:00Z

Tests of systematics in EDGES-3 data Rogers, Alan E.E.

2024-02-20T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154825 2024-05-04T03:34:09Z 2024-02-12T00:00:00Z

Analysis of EDGES-3 vs Galactic Hour Angle (GHA) Rogers, Alan E.E.

2024-02-12T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154824 2024-05-04T03:41:53Z 2024-01-22T00:00:00Z

Analysis of the solar flare on 31 December 2023 observed by EDGES-3 at the WA Rogers, Alan E.E.

2024-01-22T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154823 2024-05-04T03:42:19Z 2024-01-16T00:00:00Z

Evidence for scintillations from 3c273 in EDGES-3 at WA Rogers, Alan E.E.

2024-01-16T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154822 2024-05-04T03:59:34Z 2024-01-02T00:00:00Z

Summary of EDGES-3 results from the WA from 2023 Rogers, Alan E.E.

2024-01-02T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154821 2024-05-04T04:09:35Z 2023-12-21T00:00:00Z

Chromaticity of EDGES dipole on 48x48m ground plane raised 1m above the ground Rogers, Alan E.E.

2023-12-21T00:00:00Z Rogers, Alan E.E. Barrett, J. https://hdl.handle.net/1721.1/154820 2024-05-04T03:01:28Z 2023-12-06T00:00:00Z

FEKO simulations of close contact of wires in welded mesh ground planes Rogers, Alan E.E.; Barrett, J.

2023-12-06T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154819 2024-05-04T03:38:24Z 2023-11-15T00:00:00Z

FEKO tests of using RF switched rods to extend the low frequency coverage of EDGES-3 Rogers, Alan E.E.

2023-11-15T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154818 2024-05-04T03:44:07Z 2023-11-06T00:00:00Z

Simulations of an impedance analyzer compared with a VNA for EDGES S11 measurements Rogers, Alan E.E.

2023-11-06T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154817 2024-05-04T04:11:50Z 2023-11-01T00:00:00Z

Summary of EDGES-3 results from the WA from 2023 day 54 to 298 Rogers, Alan E.E.

2023-11-01T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154816 2024-05-04T03:30:29Z 2023-10-18T00:00:00Z

FEKO simulations of loop antenna for scanning welding slots for resonances Rogers, Alan E.E.

2023-10-18T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154815 2024-05-04T03:53:28Z 2023-10-10T00:00:00Z

Study of the source of occasional strong RFI bursts in EDGES data Rogers, Alan E.E.

2023-10-10T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154814 2024-05-04T03:49:55Z 2023-10-04T00:00:00Z

Further examination of potential resonances in the 48x48m ground plane at the WA Rogers, Alan E.E.

2023-10-04T00:00:00Z Vierinen, Juha Rogers, Alan E.E. https://hdl.handle.net/1721.1/154813 2024-05-04T03:05:27Z 2023-09-18T00:00:00Z

Ionospheric Scintillation Vierinen, Juha; Rogers, Alan E.E.

2023-09-18T00:00:00Z Rogers, Alan E.E. Vierinen, Juha https://hdl.handle.net/1721.1/154812 2024-05-04T03:42:04Z 2023-09-18T00:00:00Z

Evidence for scintillations of Cas A as the source of spiky data from Devon Island Rogers, Alan E.E.; Vierinen, Juha

2023-09-18T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154811 2024-05-04T03:27:05Z 2023-09-29T00:00:00Z

Simulations of the use of scaled antennas for global 21-cm measurements Rogers, Alan E.E.

2023-09-29T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154810 2024-05-04T03:12:19Z 2023-08-31T00:00:00Z

A test of the effect of feedback on the 21-cm absorption measurements of EDGES Rogers, Alan E.E.

2023-08-31T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154809 2024-05-04T03:50:00Z 2023-08-16T00:00:00Z

Satellite reflections of FM radio may explain additional RFI in FM band Rogers, Alan E.E.

2023-08-16T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154808 2024-05-04T04:00:42Z 2023-08-07T00:00:00Z

Tests of filtering parameters for optimum EDGES-3 calibration Rogers, Alan E.E.

2023-08-07T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154807 2024-05-04T04:01:41Z 2023-07-12T00:00:00Z

Examination of possible 60 MHz resonance at GHA 4 to 6 hours at the MRO Rogers, Alan E.E.

2023-07-12T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154806 2024-05-04T04:02:57Z 2023-06-01T00:00:00Z

21-cm absorption from Devon Island using better RFI filtering Rogers, Alan E.E.

2023-06-01T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154805 2024-05-04T03:40:04Z 2023-05-30T00:00:00Z

EDGES-3 RFI filter parameters for absorption data 2023_054 to 2023_135 Rogers, Alan E.E.

2023-05-30T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154804 2024-05-04T03:24:59Z 2023-05-12T00:00:00Z

Tests of filtering EDGES-3 data from the MRO in 2023 Rogers, Alan E.E.

2023-05-12T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154803 2024-05-04T03:38:54Z 2023-04-06T00:00:00Z

Re-examination of potential sites for global 21-cm systems Rogers, Alan E.E.

2023-04-06T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154802 2024-05-04T03:16:20Z 2023-04-03T00:00:00Z

Summary of tests of the sensitivity of EDGES-3 to systematics Rogers, Alan E.E.

2023-04-03T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154801 2024-05-04T03:57:24Z 2023-03-20T00:00:00Z

Effect of an adjacent ground plane on EDGES-3 beam chromaticity Rogers, Alan E.E.

2023-03-20T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154800 2024-05-04T03:40:54Z 2023-03-20T00:00:00Z

Analysis of EDGES-3 data from MRO following averaging of the VNA s1p data Rogers, Alan E.E.

2023-03-20T00:00:00Z Alan E.E. Rogers, J. Barrett, R. Cappallo https://hdl.handle.net/1721.1/154799 2024-05-04T03:09:27Z 2023-03-13T00:00:00Z

Averaging of VNA s11 measurements to reduce error Alan E.E. Rogers, J. Barrett, R. Cappallo

2023-03-13T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154798 2024-05-04T03:34:20Z 2023-02-21T00:00:00Z

Simulations of adding rods to broaden the bandwidth of the EDGES-3 antenna Rogers, Alan E.E.

2023-02-21T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154797 2024-05-04T03:14:47Z 2023-02-06T00:00:00Z

Simulations of extending antenna box covers for improved S11 of EDGES-3 Rogers, Alan E.E.

2023-02-06T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154796 2024-05-04T03:17:25Z 2023-01-17T00:00:00Z

Possible resonance at 75 MHz in EDGES-3 at the MRO Rogers, Alan E.E.

2023-01-17T00:00:00Z J. Barrett, R. Cappallo, K. Wilson https://hdl.handle.net/1721.1/154795 2024-05-04T03:10:02Z 2023-01-10T00:00:00Z

MRO EDGES-3 Installation, November 2022 J. Barrett, R. Cappallo, K. Wilson

2023-01-10T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154794 2024-05-04T03:00:24Z 2023-01-03T00:00:00Z

Further analysis of EDGES-3 on 48x48m ground plane at the MRO Rogers, Alan E.E.

2023-01-03T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154793 2024-05-04T03:50:32Z 2023-01-03T00:00:00Z

Short duration RFI bursts observed with EDGES-3 at the MRO Rogers, Alan E.E.

2023-01-03T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154792 2024-05-04T03:51:37Z 2022-11-14T00:00:00Z

Time filtering of EDGES-3 data from Devon Island Rogers, Alan E.E.

2022-11-14T00:00:00Z Steen, Parker https://hdl.handle.net/1721.1/154791 2024-05-04T03:17:51Z 2022-10-31T00:00:00Z

MRO air circulation and insulation assembly Steen, Parker

2022-10-31T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154790 2024-05-04T03:26:58Z 2022-10-18T00:00:00Z

RFI from digital TV and FM at Devon Island Rogers, Alan E.E.

2022-10-18T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154789 2024-05-04T03:47:43Z 2022-10-12T00:00:00Z

Simulations of the effects of DC power lines on EDGES-3 beam and S11 Rogers, Alan E.E.

2022-10-12T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154788 2024-05-04T03:30:03Z 2022-09-30T00:00:00Z

Contact corrosion as a probable cause of intermittent S11 observed at Devon Island Rogers, Alan E.E.

2022-09-30T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154787 2024-05-04T04:04:53Z 2022-09-26T00:00:00Z

Preliminary analysis of EDGES-3 data taken on Devon Island Rogers, Alan E.E.

2022-09-26T00:00:00Z Barrett, J. Cappallo, R. SooHoo, J. https://hdl.handle.net/1721.1/154786 2024-05-04T04:07:22Z 2022-08-28T00:00:00Z

Devon Island Deployment Log – August 2022 Barrett, J.; Cappallo, R.; SooHoo, J.

2022-08-28T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154785 2024-05-04T03:30:07Z 2022-07-25T00:00:00Z

FEKO modeling ground loss for layered soil in the arctic Rogers, Alan E.E.

2022-07-25T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154784 2024-05-04T04:10:02Z 2022-06-21T00:00:00Z

Simulations of the length and loss of the cables used in noise wave calibration Rogers, Alan E.E.

2022-06-21T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154783 2024-05-04T03:02:20Z 2022-06-02T00:00:00Z

Proposed ground plane and set-up deployment Haughton crater Devon Island Rogers, Alan E.E.

2022-06-02T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154782 2024-05-04T03:48:08Z 2022-07-27T00:00:00Z

Software for EDGES-3 and information for deployment on Devon Island Rogers, Alan E.E.

2022-07-27T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154781 2024-05-04T03:23:46Z 2022-05-11T00:00:00Z

The effects of a raised ground plane Rogers, Alan E.E.

2022-05-11T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154780 2024-05-04T03:51:29Z 2022-04-19T00:00:00Z

Proposed wire grid ground plane for deployment in the arctic Rogers, Alan E.E.

2022-04-19T00:00:00Z Huyghebaert, D. Vierinen, Juha https://hdl.handle.net/1721.1/154779 2024-05-04T03:01:56Z 2022-03-30T00:00:00Z

VHF Ny Alesund Radio Survey Huyghebaert, D.; Vierinen, Juha

2022-03-30T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154778 2024-05-04T03:39:30Z 2022-03-07T00:00:00Z

Ground plane designs for deployment of EDGES-3 in the tundra Rogers, Alan E.E.

2022-03-07T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154777 2024-05-04T04:00:56Z 2022-02-08T00:00:00Z

Haystack EDGES processing pipeline Rogers, Alan E.E.

2022-02-08T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154776 2024-05-04T04:04:22Z 2022-02-08T00:00:00Z

Sensitivity of beam chromaticity to antenna azimuth Rogers, Alan E.E.

2022-02-08T00:00:00Z Rogers, Alan E.E. Barrett, J. Wilson, K. https://hdl.handle.net/1721.1/154775 2024-05-04T03:40:23Z 2022-01-24T00:00:00Z

RFI monitor test Rogers, Alan E.E.; Barrett, J.; Wilson, K.

2022-01-24T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154774 2024-05-04T03:20:45Z 2022-01-25T00:00:00Z

Specifications for deployment of EDGES-3 at a new site Rogers, Alan E.E.

2022-01-25T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154773 2024-05-04T04:01:54Z 2022-01-03T00:00:00Z

Simulations of EDGES-3 noise and comparison with data using antenna simulator Rogers, Alan E.E.

2022-01-03T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154772 2024-05-04T03:06:27Z 2021-12-16T00:00:00Z

Tests and checks of low2-45 2020_058 to 2021_195 GHA 5 to 7 hrs Rogers, Alan E.E.

2021-12-16T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154771 2024-05-04T03:09:21Z 2021-12-13T00:00:00Z

Simulations of calibration and tests of sensitivity to sources of error Rogers, Alan E.E.

2021-12-13T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154770 2024-05-04T03:47:45Z 2021-12-07T00:00:00Z

Simulations on the effects of trees and other scattering structures near antenna Rogers, Alan E.E.

2021-12-07T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154769 2024-05-04T03:48:19Z 2021-12-07T00:00:00Z

Comparison of welded mesh and meandering wire grid ground planes Rogers, Alan E.E.

2021-12-07T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154768 2024-05-04T03:54:51Z 2021-11-23T00:00:00Z

Possible explanations for the differences between the simulations and lowband1 at LST 13 hours Rogers, Alan E.E.

2021-11-23T00:00:00Z Barrett, J. Rogers, Alan E.E. Wilson, K. https://hdl.handle.net/1721.1/154767 2024-05-04T03:38:22Z 2021-11-09T00:00:00Z

EDGES-3 at West Forks Maine and limits of internally generated RFI Barrett, J.; Rogers, Alan E.E.; Wilson, K.

2021-11-09T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154766 2024-05-04T03:34:45Z 2021-11-09T00:00:00Z

FEKO simulations of beam and loss chromaticity for lowband antenna on layered soil Rogers, Alan E.E.

2021-11-09T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154765 2024-05-04T03:10:29Z 2021-11-03T00:00:00Z

Comparison of beam and lowband1 data in 2 hour LST blocks Rogers, Alan E.E.

2021-11-03T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154764 2024-05-04T04:10:33Z 2021-10-26T00:00:00Z

Tests of EDGES-3 antenna input S-parameters Rogers, Alan E.E.

2021-10-26T00:00:00Z Steen, Parker https://hdl.handle.net/1721.1/154763 2024-05-04T03:00:17Z 2021-10-26T00:00:00Z

Airflow test results and insulation mounting Steen, Parker

2021-10-26T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154762 2024-05-04T03:44:09Z 2021-10-14T00:00:00Z

Simulations of effects of scattering on absorption search with antenna with small groundplane Rogers, Alan E.E.

2021-10-14T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154761 2024-05-04T03:37:03Z 2021-10-14T00:00:00Z

FEKO simulations of ground loss for small ground planes Rogers, Alan E.E.

2021-10-14T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154760 2024-05-04T03:26:41Z 2021-09-30T00:00:00Z

Tests of EDGES-3 calibration and VNA measurement accuracy Rogers, Alan E.E.

2021-09-30T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154759 2024-05-04T03:21:49Z 2021-09-20T00:00:00Z

Dependence of sensitivity to VNA delay error on antenna and LNA s11 Rogers, Alan E.E.

2021-09-20T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154758 2024-05-04T03:11:50Z 2021-08-30T00:00:00Z

Repeatability and accuracy of EDGES-3 automated calibration Rogers, Alan E.E.

2021-08-30T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154757 2024-05-04T03:14:06Z 2021-07-28T00:00:00Z

Two tone test of EDGES-3 Rogers, Alan E.E.

2021-07-28T00:00:00Z Steen, Parker https://hdl.handle.net/1721.1/154756 2024-05-04T03:57:41Z 2021-07-20T00:00:00Z

Thermal test results of antenna insulation Steen, Parker

2021-07-20T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154755 2024-05-04T03:14:15Z 2021-07-22T00:00:00Z

Study of EDGES-3 out of band noise Rogers, Alan E.E.

2021-07-22T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154754 2024-05-04T03:03:36Z 2021-06-24T00:00:00Z

Automated tests of VNA warm-up needed for highest accuracy Rogers, Alan E.E.

2021-06-24T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154753 2024-05-04T03:50:21Z 2021-06-15T00:00:00Z

Photogrammetric mapping of low2 ground plane Rogers, Alan E.E.

2021-06-15T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154752 2024-05-04T03:33:47Z 2021-06-03T00:00:00Z

Tests of automated calibration self-checks using EDGES-3 Rogers, Alan E.E.

2021-06-03T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154751 2024-05-04T03:05:19Z 2021-05-11T00:00:00Z

Formula for fractional ripple from scattering Rogers, Alan E.E.

2021-05-11T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154750 2024-05-04T03:47:10Z 2021-04-27T00:00:00Z

Tests of averaging over GHA Rogers, Alan E.E.

2021-04-27T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154749 2024-05-04T03:45:33Z 2021-03-23T00:00:00Z

Considerations for using a small metal ground plane on soil ground plane offsets Rogers, Alan E.E.

2021-03-23T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154748 2024-05-04T03:35:29Z 2021-03-11T00:00:00Z

Simulations of 30x30m uneven ground plane with random panel offsets Rogers, Alan E.E.

2021-03-11T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154747 2024-05-04T03:10:04Z 2021-03-01T00:00:00Z

Effects of a tilted and uneven ground plane vs Galactic Hour Angle Rogers, Alan E.E.

2021-03-01T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154746 2024-05-04T03:41:22Z 2021-02-23T00:00:00Z

The sensitivity of midband to ground plane tilt and deviations from flatness Rogers, Alan E.E.

2021-02-23T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154745 2024-05-04T03:47:22Z 2021-02-18T00:00:00Z

Tests of instrumental errors on midband data from 2018 and 2020 Rogers, Alan E.E.

2021-02-18T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154744 2024-05-04T03:00:41Z 2021-02-12T00:00:00Z

Effects of tilts and sky maps on beam correction for different antennas and ground planes Rogers, Alan E.E.

2021-02-12T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154743 2024-05-04T03:12:37Z 2020-01-26T00:00:00Z

Testing VNA for I/Q crosstalk Rogers, Alan E.E.

2020-01-26T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154742 2024-05-04T04:05:53Z 2020-01-04T00:00:00Z

Measurements of the galvanized ground plane mesh permeability and ground plane loss estimate Rogers, Alan E.E.

2020-01-04T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154741 2024-05-04T03:48:15Z 2020-12-15T00:00:00Z

The effects of refraction by the troposphere and ionosphere Rogers, Alan E.E.

2020-12-15T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154740 2024-05-04T03:09:23Z 2020-11-23T00:00:00Z

Simulations of the effects of scattering on the shape and frequency dependence of the beam Rogers, Alan E.E.

2020-11-23T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154739 2024-05-04T03:31:04Z 2020-11-12T00:00:00Z

Effect of temperature difference between cable and load in an antenna simulator Rogers, Alan E.E.

2020-11-12T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154738 2024-05-04T04:08:50Z 2020-11-03T00:00:00Z

Tests of the number of terms needed to adequately model the lowband foreground Rogers, Alan E.E.

2020-11-03T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154737 2024-05-04T03:32:34Z 2020-10-14T00:00:00Z

Simulations and tests of scattering effects vs Galactic Hour Angle Rogers, Alan E.E.

2020-10-14T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154736 2024-05-04T03:32:41Z 2020-10-05T00:00:00Z

Evidence that EDGES lowband results are limited by scattering near transit of the Galactic center Rogers, Alan E.E.

2020-10-05T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154735 2024-05-04T04:00:29Z 2020-09-30T00:00:00Z

Simulations of the effects of ground plane and antenna tilts Rogers, Alan E.E.

2020-09-30T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154734 2024-05-04T03:23:17Z 2020-09-15T00:00:00Z

Modeling ferrite tiles for reducing reflections from hut Rogers, Alan E.E.

2020-09-15T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154733 2024-05-04T03:31:38Z 2020-08-31T00:00:00Z

Effects of rocks and brush southeast of low2-45 Rogers, Alan E.E.

2020-08-31T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154732 2024-05-04T03:21:02Z 2020-08-04T00:00:00Z

Simulations of reflections from objects which produce fine structure in the antenna beam Rogers, Alan E.E.

2020-08-04T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154731 2024-05-04T03:10:43Z 2020-07-22T00:00:00Z

Results of absorption search vs GHA for low1 and low2-45 Rogers, Alan E.E.

2020-07-22T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154730 2024-05-04T03:48:14Z 2020-07-14T00:00:00Z

Additional tests of sources of beam chromaticity Rogers, Alan E.E.

2020-07-14T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154729 2024-05-04T03:00:55Z 2020-07-01T00:00:00Z

Simulations of the chromaticity of the lowband antenna on an uneven ground plane Rogers, Alan E.E.

2020-07-01T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154728 2024-05-04T03:28:24Z 2020-06-17T00:00:00Z

Beam correction comparison tests using sky maps at 45 and 408 MHz and correction for antenna tilt. Rogers, Alan E.E.

2020-06-17T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154727 2024-05-04T03:08:47Z 2020-05-28T00:00:00Z

Noise and fine frequency structure in EDGES data and simulations Rogers, Alan E.E.

2020-05-28T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154726 2024-05-04T03:02:08Z 2020-05-14T00:00:00Z

Circuit model simulation of EDGES data Rogers, Alan E.E.

2020-05-14T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154725 2024-05-04T03:22:50Z 2020-05-06T00:00:00Z

Effect of I/Q crosstalk in VNA measurements Rogers, Alan E.E.

2020-05-06T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154724 2024-05-04T03:37:28Z 2020-04-27T00:00:00Z

Simulations of the self-detectability of error sources in EDGES-3 Rogers, Alan E.E.

2020-04-27T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154723 2024-05-04T03:51:18Z 2020-04-17T00:00:00Z

Tests of antenna S11 measurements Rogers, Alan E.E.

2020-04-17T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154722 2024-05-04T03:01:16Z 2020-04-09T00:00:00Z

Preliminary analysis of data from Lowband 2 on large perforated ground plane Rogers, Alan E.E.

2020-04-09T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154721 2024-05-04T03:38:39Z 2020-03-31T00:00:00Z

Antenna resistive loss estimates Rogers, Alan E.E.

2020-03-31T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154720 2024-05-04T03:57:10Z 2020-03-30T00:00:00Z

Simulations of resistive loss in galvanized mesh surrounding aluminum baseplate Rogers, Alan E.E.

2020-03-30T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154719 2024-05-04T03:24:25Z 2020-03-16T00:00:00Z

Simulations of resistive loss in galvanized steel Rogers, Alan E.E.

2020-03-16T00:00:00Z Barrett, J. https://hdl.handle.net/1721.1/154718 2024-05-04T03:53:43Z 2020-03-04T00:00:00Z

Boolardy Site Visit Log – February 2020 Barrett, J.

2020-03-04T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154717 2024-05-04T03:12:32Z 2020-03-02T00:00:00Z

ADC saturation by lightning Rogers, Alan E.E.

2020-03-02T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154716 2024-05-04T03:33:27Z 2020-02-24T00:00:00Z

Insulation cover for EDGES Rogers, Alan E.E.

2020-02-24T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154715 2024-05-04T03:42:36Z 2020-02-11T00:00:00Z

Improvement in bandwidth of EDGES-3 chromaticity using a cone under the antenna Rogers, Alan E.E.

2020-02-11T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154714 2024-05-04T04:08:28Z 2020-01-22T00:00:00Z

Sensitivity simulations of EDGES-3 to VNA measurement errors Rogers, Alan E.E.

2020-01-22T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154713 2024-05-04T03:36:46Z 2020-01-16T00:00:00Z

Test of 100 ps error in VNA calibration measurement Rogers, Alan E.E.

2020-01-16T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154712 2024-05-04T03:10:10Z 2020-01-06T00:00:00Z

Estimates of RFI emissions from EDGES-3 Rogers, Alan E.E.

2020-01-06T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154711 2024-05-04T03:20:57Z 2020-01-06T00:00:00Z

Simulations of the sensitivity of systematic errors in VNA S11 measurements to LNA parameters Rogers, Alan E.E.

2020-01-06T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154710 2024-05-04T03:11:20Z 2020-01-02T00:00:00Z

Effects of adjacent ground planes and antennas Rogers, Alan E.E.

2020-01-02T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154709 2024-05-04T03:04:42Z 2019-12-11T00:00:00Z

Comparison of square circular and perforated ground planes Rogers, Alan E.E.

2019-12-11T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154708 2024-05-04T03:40:51Z 2019-11-26T00:00:00Z

Estimate of ground plane mesh and antenna loss Rogers, Alan E.E.

2019-11-26T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154707 2024-05-04T03:53:54Z 2019-11-20T00:00:00Z

Comparison of EDGES-3 on different ground planes Rogers, Alan E.E.

2019-11-20T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154706 2024-05-04T03:37:27Z 2019-11-12T00:00:00Z

Proposed air circulation for EDGES-3 at the MRO Rogers, Alan E.E.

2019-11-12T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154705 2024-05-04T03:33:35Z 2019-11-04T00:00:00Z

Optimization of EDGES-3 antenna Rogers, Alan E.E.

2019-11-04T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154704 2024-05-04T03:41:38Z 2019-10-25T00:00:00Z

Proposed air circulation system for EDGES-3 Rogers, Alan E.E.

2019-10-25T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154703 2024-05-04T03:30:49Z 2019-10-17T00:00:00Z

Estimate of meteor scatter rates and filter thresholds Rogers, Alan E.E.

2019-10-17T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154702 2024-05-04T04:05:06Z 2019-09-27T00:00:00Z

EDGES-3 test deployment at Skull Creek, Oregon Rogers, Alan E.E.

2019-09-27T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154701 2024-05-04T03:37:22Z 2019-09-04T00:00:00Z

Shielding factor from non-uniform ground Rogers, Alan E.E.

2019-09-04T00:00:00Z Bair,Ethan Rogers, Alan E.E. https://hdl.handle.net/1721.1/154700 2024-05-04T03:45:18Z 2019-08-27T00:00:00Z

Ground Plane Analysis for EDGES-3 Test Deployment in Oregon Bair,Ethan; Rogers, Alan E.E.

2019-08-27T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154699 2024-05-04T03:31:05Z 2019-07-16T00:00:00Z

Tests of the effects of strong RFI Rogers, Alan E.E.

2019-07-16T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154698 2024-05-04T04:08:32Z 2019-07-16T00:00:00Z

EDGES-3 Test observations at West Forks Maine Rogers, Alan E.E.

2019-07-16T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154697 2024-05-04T03:34:08Z 2019-07-16T00:00:00Z

Test of EDGES-3 using antenna simulator Rogers, Alan E.E.

2019-07-16T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154696 2024-05-04T03:01:53Z 2019-07-11T00:00:00Z

EDGES-3 Thermal Tests Rogers, Alan E.E.

2019-07-11T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154695 2024-05-04T03:10:50Z 2019-08-05T00:00:00Z

Simulations of the effects of EDGES-3 S11 corrections Rogers, Alan E.E.

2019-08-05T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154694 2024-05-04T03:42:05Z 2019-06-26T00:00:00Z

Initial Test of EDGES-3 antenna S11 Rogers, Alan E.E.

2019-06-26T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154693 2024-05-04T03:43:06Z 2019-06-10T00:00:00Z

Study of RFI generated by EDGES-3 Rogers, Alan E.E.

2019-06-10T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154692 2024-05-04T03:00:51Z 2019-08-28T00:00:00Z

Details of EDGES-3 prototype Rogers, Alan E.E.

2019-08-28T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154691 2024-05-04T03:21:17Z 2019-05-14T00:00:00Z

Estimates of isolation requirements for EDGES-3 electronics Rogers, Alan E.E.

2019-05-14T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154690 2024-05-04T03:01:13Z 2019-03-04T00:00:00Z

Simulations of EDGES-3 antenna and wire grid ground plane Rogers, Alan E.E.

2019-03-04T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154689 2024-05-04T03:00:52Z 2019-03-04T00:00:00Z

Sensitivity of the beam chromaticity midband antenna on large ground plane Rogers, Alan E.E.

2019-03-04T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154688 2024-05-04T03:38:44Z 2019-01-30T00:00:00Z

Reconnaissance of Skull Creek Reservoir area located in Catlow Valley, Oregon. Rogers, Alan E.E.

2019-01-30T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154687 2024-05-04T03:16:10Z 2019-01-03T00:00:00Z

Simulations of chromaticity effects of non-uniform soil. Rogers, Alan E.E.

2019-01-03T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154686 2024-05-04T03:10:51Z 2019-01-02T00:00:00Z

Simulations of EDGES-3 chromaticity and ground loss for potential deployment in Oregon. Rogers, Alan E.E.

2019-01-02T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154685 2024-05-04T03:40:45Z 2018-12-03T00:00:00Z

Update on aspects of the EDGES-3 antenna and electronics design. Rogers, Alan E.E.

2018-12-03T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154684 2024-05-04T03:07:30Z 2018-11-27T00:00:00Z

Comparison of different EDGES antennas. Rogers, Alan E.E.

2018-11-27T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154683 2024-05-04T03:43:29Z 2018-11-19T00:00:00Z

FEKO simulations for EDGES-3 box blade antenna. Rogers, Alan E.E.

2018-11-19T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154682 2024-05-04T03:44:18Z 2018-10-25T00:00:00Z

Comparison of ground loss from LOW3 data with FEKO model. Rogers, Alan E.E.

2018-10-25T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154681 2024-05-04T04:06:03Z 2018-10-17T00:00:00Z

Considerations for placing the electronics on the antenna. Rogers, Alan E.E.

2018-10-17T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154680 2024-05-04T04:01:24Z 2018-09-25T00:00:00Z

Comparison of vertical and horizontal antennas on soil ground. Rogers, Alan E.E.

2018-09-25T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154679 2024-05-04T03:00:36Z 2018-09-05T00:00:00Z

Signature search for midband and lowband2 vs GHA. Rogers, Alan E.E.

2018-09-05T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154678 2024-05-04T03:21:05Z 2021-06-14T00:00:00Z

Weighted least squares signature using low and midband data. Rogers, Alan E.E.

2021-06-14T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154677 2024-05-04T03:36:10Z 2018-08-28T00:00:00Z

Preliminary results from lowband antenna on highband ground plane. Rogers, Alan E.E.

2018-08-28T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154676 2024-05-04T03:18:50Z 2018-08-14T00:00:00Z

Mechanism for interconnection resonances. Rogers, Alan E.E.

2018-08-14T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154675 2024-05-04T03:33:25Z 2018-08-06T00:00:00Z

Simulations of resonances in lowband ground plane due to poor connectivity. Rogers, Alan E.E.

2018-08-06T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154674 2024-05-04T03:37:37Z 2018-07-17T00:00:00Z

Results of field measurements of noise source antenna simulator. Rogers, Alan E.E.

2018-07-17T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154673 2024-05-04T04:09:54Z 2018-06-26T00:00:00Z

Midband results using recalibrated receiver 1 from 2018_146 to 2018_174.. Rogers, Alan E.E.

2018-06-26T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154672 2024-05-04T03:00:35Z 2018-06-21T00:00:00Z

Beam chromaticity and ground loss for lowband on 5×5 m ground plane. Rogers, Alan E.E.

2018-06-21T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154671 2024-05-04T03:39:36Z 2018-07-09T00:00:00Z

Estimate of the chromaticity of the foreground reflected from the lunar surface. Rogers, Alan E.E.

2018-07-09T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154670 2024-05-04T03:45:57Z 2018-04-23T00:00:00Z

Absorption profile fitting tests on data release. Rogers, Alan E.E.

2018-04-23T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154669 2024-05-04T03:38:07Z 2018-04-10T00:00:00Z

Limitations of the MOM in calculating the antenna beam using Green’s functions for lossy ground. Rogers, Alan E.E.

2018-04-10T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154668 2024-05-04T03:32:56Z 2018-05-01T00:00:00Z

Midband results from 2017_329 to 2018_043. Rogers, Alan E.E.

2018-05-01T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154667 2024-05-04T03:47:38Z 2018-03-27T00:00:00Z

Results from the EDGES-1 antenna which is electrically small at low band. Rogers, Alan E.E.

2018-03-27T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154666 2024-05-04T03:11:40Z 2020-04-24T00:00:00Z

Evidence for intermittent antenna S11 for lowband2 data. Rogers, Alan E.E.

2020-04-24T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154665 2024-05-04T03:41:27Z 2018-02-06T00:00:00Z

Modeling of midland balun loss. Rogers, Alan E.E.

2018-02-06T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154664 2024-05-04T03:53:09Z 2018-01-23T00:00:00Z

Estimates of signature confidence for lowband data using delta Chi-squared boundaries. Rogers, Alan E.E.

2018-01-23T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154663 2024-05-04T03:36:01Z 2018-01-11T00:00:00Z

Changes of the ranking of systematics with bandwidth. Rogers, Alan E.E.

2018-01-11T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154662 2024-05-04T03:55:49Z 2017-12-18T00:00:00Z

Tests of the midband balun and connector loss. Rogers, Alan E.E.

2017-12-18T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154661 2024-05-04T03:50:08Z 2017-12-04T00:00:00Z

Initial tests of silicon dioxide cable box. Rogers, Alan E.E.

2017-12-04T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154660 2024-05-04T03:08:00Z 2017-11-21T00:00:00Z

Cancellation of 3-position switch noise bias. Rogers, Alan E.E.

2017-11-21T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154659 2024-05-04T03:30:20Z 2017-11-16T00:00:00Z

Tests of mid band antenna. Rogers, Alan E.E.

2017-11-16T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154658 2024-05-04T03:50:03Z 2017-09-07T00:00:00Z

Optimization of a mid band antenna. Rogers, Alan E.E.

2017-09-07T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154657 2024-05-04T03:52:49Z 2017-09-07T00:00:00Z

Foreground and beam chromaticity contribution to lowband spectra. Rogers, Alan E.E.

2017-09-07T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154656 2024-05-04T03:35:36Z 2017-08-14T00:00:00Z

Automated S11 measurement system calibration. Rogers, Alan E.E.

2017-08-14T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154655 2024-05-04T03:41:16Z 2017-08-04T00:00:00Z

Beam chromaticity and ground loss vs ground plane size. Rogers, Alan E.E.

2017-08-04T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154654 2024-05-04T04:08:06Z 2017-08-04T00:00:00Z

Effect of errors in the assumed S11 of calibration SOL on signature amplitude via antenna S11 error. Rogers, Alan E.E.

2017-08-04T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154653 2024-05-04T04:07:27Z 2017-07-24T00:00:00Z

The effect of galactic recombination lines on the signature. Rogers, Alan E.E.

2017-07-24T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154652 2024-05-04T03:13:36Z 2017-11-21T00:00:00Z

Lowband1 and Lowband2 signature search using lowband2 receiver calibrations at 15 and 35 C. Rogers, Alan E.E.

2017-11-21T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154651 2024-05-04T03:07:40Z 2017-07-24T00:00:00Z

Tests of the changes in signature with local time, and temperature and humidity. Rogers, Alan E.E.

2017-07-24T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154650 2024-05-04T03:14:32Z 2020-03-30T00:00:00Z

Lowband ground loss for extended ground plane from FEKO with soil dielectric. Rogers, Alan E.E.

2020-03-30T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154649 2024-05-04T03:41:18Z 2017-07-18T00:00:00Z

Effects of beam correction, loss and calibration on lowband1 data. Rogers, Alan E.E.

2017-07-18T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154648 2024-05-04T03:32:30Z 2017-07-18T00:00:00Z

Effect of using receiver calibrations made at different temperatures. Rogers, Alan E.E.

2017-07-18T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154647 2024-05-04T03:12:46Z 2017-06-20T00:00:00Z

Effects of temperature on internal loads in automated antenna S11 measurements. Rogers, Alan E.E.

2017-06-20T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154646 2024-05-04T03:14:37Z 2017-06-20T00:00:00Z

Simulations of the effects of systematics on signature detection. Rogers, Alan E.E.

2017-06-20T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154645 2024-05-04T03:58:31Z 2017-06-12T00:00:00Z

Lowband1 2017 calibration differences. Rogers, Alan E.E.

2017-06-12T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154644 2024-05-04T03:06:45Z 2017-06-06T00:00:00Z

Simulations of signature search with different number of added function. Rogers, Alan E.E.

2017-06-06T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154643 2024-05-04T03:47:19Z 2017-05-25T00:00:00Z

Simulations of signature detection with small ground plane. Rogers, Alan E.E.

2017-05-25T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154642 2024-05-04T03:11:09Z 2017-05-16T00:00:00Z

RFI excision of FM signals. Rogers, Alan E.E.

2017-05-16T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154641 2024-05-04T03:41:56Z 2017-05-15T00:00:00Z

Ranking of systematics in signature search. Rogers, Alan E.E.

2017-05-15T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154640 2024-05-04T03:34:44Z 2017-05-10T00:00:00Z

Comparison of beam models. Rogers, Alan E.E.

2017-05-10T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154639 2024-05-04T03:03:31Z 2017-05-08T00:00:00Z

Galaxy calibration of low band data. Rogers, Alan E.E.

2017-05-08T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154638 2024-05-04T03:37:34Z 2017-05-08T00:00:00Z

Sensitivity of the variation of the signature amplitude with GHA to systematics. Rogers, Alan E.E.

2017-05-08T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154637 2024-05-04T03:56:48Z 2017-05-08T00:00:00Z

Summary of lowband results and tests. Rogers, Alan E.E.

2017-05-08T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154636 2024-05-04T03:27:58Z 2017-04-26T00:00:00Z

Sensitivity of the lowband signature to RFI excision parameters. Rogers, Alan E.E.

2017-04-26T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154635 2024-05-04T03:36:18Z 2017-04-11T00:00:00Z

Detection of changes in receiver calibration. Rogers, Alan E.E.

2017-04-11T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154634 2024-05-04T03:33:54Z 2017-04-10T00:00:00Z

Sensitivity of calibration to integration time. Rogers, Alan E.E.

2017-04-10T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154633 2024-05-04T03:24:11Z 2017-03-28T00:00:00Z

Simulations of rensonances in balun shield. Rogers, Alan E.E.

2017-03-28T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154632 2024-05-04T04:06:59Z 2017-03-15T00:00:00Z

Low band signature search using only Galaxy up data. Rogers, Alan E.E.

2017-03-15T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154631 2024-05-04T03:40:31Z 2017-03-13T00:00:00Z

Sensitivity of absorption signature search on ground plane loss. Rogers, Alan E.E.

2017-03-13T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154630 2024-05-04T03:40:41Z 2017-03-13T00:00:00Z

Tests of LNA input S11 and switch contact resistance. Rogers, Alan E.E.

2017-03-13T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154629 2024-05-04T03:35:59Z 2017-03-08T00:00:00Z

Sensitivity of absorption signature search to LNA S11 error. Rogers, Alan E.E.

2017-03-08T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154628 2024-05-04T03:47:18Z 2017-02-28T00:00:00Z

Comparison of the effect of systematics in 4 and 5 term search for absorption in low band data. Rogers, Alan E.E.

2017-02-28T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154627 2024-05-04T03:18:46Z 2017-02-23T00:00:00Z

Minor changes to increase EDGES accuracy. Rogers, Alan E.E.

2017-02-23T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154626 2024-05-04T03:07:14Z 2017-02-21T00:00:00Z

Suggested improved orientation for second low band ground plane. Rogers, Alan E.E.

2017-02-21T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154625 2024-05-04T03:12:12Z 2017-02-15T00:00:00Z

Simulations of the effects of systematics on a specific absorption signature Rogers, Alan E.E.

2017-02-15T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154624 2024-05-04T03:10:57Z 2017-02-15T00:00:00Z

Recalibration of high band receiver Rogers, Alan E.E.

2017-02-15T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154623 2024-05-04T03:32:52Z 2017-02-14T00:00:00Z

Tests of the FEKO beam accuracy Rogers, Alan E.E.

2017-02-14T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154622 2024-05-04T03:10:13Z 2017-01-31T00:00:00Z

3-position switch noise bias. Rogers, Alan E.E.

2017-01-31T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154621 2024-05-04T04:00:10Z 2017-01-23T00:00:00Z

Ionospheric absorption from low band data. Rogers, Alan E.E.

2017-01-23T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154620 2024-05-04T04:06:47Z 2017-01-12T00:00:00Z

Tests of EDGES spectrometer using a noise source based on antenna simulator. Rogers, Alan E.E.

2017-01-12T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154619 2024-05-04T03:38:11Z 2017-01-10T00:00:00Z

Tests of the effects of RFI from 50 to 100 MHz. Rogers, Alan E.E.

2017-01-10T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154618 2024-05-04T03:39:12Z 2017-01-04T00:00:00Z

Tests of variations of absorption signature shape Rogers, Alan E.E.

2017-01-04T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154617 2024-05-04T03:45:29Z 2016-12-29T00:00:00Z

Amplitude of absorption signature vs Galactic Center hour angle Rogers, Alan E.E.

2016-12-29T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154616 2024-05-04T03:31:35Z 2016-12-27T00:00:00Z

Simulations of the reduction of beam effects by averaging over GHA Rogers, Alan E.E.

2016-12-27T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154615 2024-05-04T03:41:08Z 2016-12-27T00:00:00Z

Tests of the levels of Lyman alpha which lead to a flattened absorption profile Rogers, Alan E.E.

2016-12-27T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154614 2024-05-04T04:07:58Z 2016-12-19T00:00:00Z

Tests of the effect of systematics in the search for absorption signature in low band data Rogers, Alan E.E.

2016-12-19T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154613 2024-05-04T03:01:08Z 2016-12-02T00:00:00Z

Optical depth calculation Rogers, Alan E.E.

2016-12-02T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154612 2024-05-04T04:02:59Z 2016-11-29T00:00:00Z

21-cm absorption signatue for large optical depth. Rogers, Alan E.E.

2016-11-29T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154611 2024-05-04T04:01:20Z 2016-11-14T00:00:00Z

Results of measurements of an artificial antenna noise source. Rogers, Alan E.E.

2016-11-14T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154610 2024-05-04T03:32:08Z 2016-11-07T00:00:00Z

Further improvements and tests of the LNA. Rogers, Alan E.E.

2016-11-07T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154609 2024-05-04T03:54:04Z 2016-10-27T00:00:00Z

Sensitivity of spectral residuals with 3 parameters removed to systematics. Rogers, Alan E.E.

2016-10-27T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154608 2024-05-04T04:01:11Z 2016-10-18T00:00:00Z

Low band balun with slightly lower loss. Rogers, Alan E.E.

2016-10-18T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154607 2024-05-04T03:42:58Z 2016-10-18T00:00:00Z

Tests of Galaxy calibration using low band data from extended ground plane Rogers, Alan E.E.

2016-10-18T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154606 2024-05-04T04:08:41Z 2016-10-04T00:00:00Z

First dat from extended ground plane. Rogers, Alan E.E.

2016-10-04T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154605 2024-05-04T04:06:41Z 2016-09-13T00:00:00Z

RFI in low band. Rogers, Alan E.E.

2016-09-13T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154604 2024-05-04T03:41:14Z 2016-08-30T00:00:00Z

EDGES-2 low band error budget. Rogers, Alan E.E.

2016-08-30T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154603 2024-05-04T03:21:20Z 2016-08-18T00:00:00Z

Tests of fitting, filtering and averaging schemes. Rogers, Alan E.E.

2016-08-18T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154602 2024-05-04T03:29:39Z 2017-07-11T00:00:00Z

Second low band antenna and balun tests. Rogers, Alan E.E.

2017-07-11T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154601 2024-05-04T03:01:26Z 2020-03-30T00:00:00Z

Theoretical approximations for a slot antenna resonance. Rogers, Alan E.E.

2020-03-30T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154600 2024-05-04T03:11:06Z 2016-07-26T00:00:00Z

Evidence of possible resonance at 70 MHz in the low band data. Rogers, Alan E.E.

2016-07-26T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154599 2024-05-04T03:02:48Z 2016-07-20T00:00:00Z

Sensitivity to ground plane defects. Rogers, Alan E.E.

2016-07-20T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154598 2024-05-04T03:35:09Z 2016-07-09T00:00:00Z

Effect of ground plane model parameters. Rogers, Alan E.E.

2016-07-09T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154597 2024-05-04T03:25:11Z 2016-06-28T00:00:00Z

Tests of super hydrophobic coatings for dew reduction on blade antenna. Rogers, Alan E.E.

2016-06-28T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154596 2024-05-04T03:42:07Z 2016-06-15T00:00:00Z

Proposed low band ground plane design. Rogers, Alan E.E.

2016-06-15T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154595 2024-05-04T03:41:50Z 2016-06-27T00:00:00Z

Dependence of the low band spectra on the Galactic center Hour Angle (GHA). Rogers, Alan E.E.

2016-06-27T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154594 2024-05-04T03:34:18Z 2016-05-31T00:00:00Z

Tests of Galaxy calibration using low and high band data. Rogers, Alan E.E.

2016-05-31T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154593 2024-05-04T03:00:45Z 2016-05-18T00:00:00Z

Effects of different ground plane models on low band results. Rogers, Alan E.E.

2016-05-18T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154592 2024-05-04T03:36:41Z 2016-05-11T00:00:00Z

Spectral index from high and low band. Rogers, Alan E.E.

2016-05-11T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154591 2024-05-04T03:50:44Z 2018-07-09T00:00:00Z

Artificial Antenna Simulator. Rogers, Alan E.E.

2018-07-09T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154590 2024-05-04T03:12:59Z 2016-05-05T00:00:00Z

Simulations of averaging beam effects over local sidreal time and antenna orientation. Rogers, Alan E.E.

2016-05-05T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154589 2024-05-04T03:12:56Z 2016-04-20T00:00:00Z

Low band balun tube and Airline as a candidates for external validation of VNA Calibration. Rogers, Alan E.E.

2016-04-20T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154588 2024-05-04T03:44:55Z 2016-10-28T00:00:00Z

Feature at 84 MHz. Rogers, Alan E.E.

2016-10-28T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154587 2024-05-04T04:06:35Z 2016-04-11T00:00:00Z

Comparison of fine structure in the high and low band spectra. Rogers, Alan E.E.

2016-04-11T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154586 2024-05-04T03:48:39Z 2016-04-05T00:00:00Z

Simulations of the effect of the electronics hut on the low band data. Rogers, Alan E.E.

2016-04-05T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154585 2024-05-04T03:31:31Z 2016-04-28T00:00:00Z

Estimate of temperature gradient in EDGES receiver enclosure. Rogers, Alan E.E.

2016-04-28T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154584 2024-05-04T03:54:00Z 2016-03-28T00:00:00Z

Tests of the sensitivity of low band to systematics. Rogers, Alan E.E.

2016-03-28T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154583 2024-05-04T03:11:11Z 2016-03-17T00:00:00Z

Preliminary estimate of the effect of foreground polarization. Rogers, Alan E.E.

2016-03-17T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154582 2024-05-04T03:30:52Z 2016-03-09T00:00:00Z

Physical functions vs polynomial. Rogers, Alan E.E.

2016-03-09T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154581 2024-05-04T03:39:53Z 2016-02-29T00:00:00Z

Sensitivity of the frequency dependence of beam to ground plane parameters. Rogers, Alan E.E.

2016-02-29T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154580 2024-05-04T03:30:17Z 2016-02-22T00:00:00Z

Comparison of high and low band data with beam effects computed with infinite and finite ground plane. Rogers, Alan E.E.

2016-02-22T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154579 2024-05-04T03:07:27Z 2016-02-10T00:00:00Z

Comparison of frequency structure in beam and loss from simulations and EDGES data Rogers, Alan E.E.

2016-02-10T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154578 2024-05-04T03:27:32Z 2016-01-20T00:00:00Z

Contribution of the ground plane to antenna beam chromaticity Rogers, Alan E.E.

2016-01-20T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154577 2024-05-04T03:03:21Z 2016-01-12T00:00:00Z

More tests of the effects of finite ground plane Rogers, Alan E.E.

2016-01-12T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154576 2024-05-04T04:08:22Z 2016-01-04T00:00:00Z

Beam effects of finite ground plane Rogers, Alan E.E.

2016-01-04T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154575 2024-05-04T03:48:28Z 2016-01-04T00:00:00Z

Spectral Structure at the Low end of Low Band Rogers, Alan E.E.

2016-01-04T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154574 2024-05-04T03:37:48Z 2015-12-18T00:00:00Z

EDGES-2 error budget update #2 Rogers, Alan E.E.

2015-12-18T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154573 2024-05-04T03:53:37Z 2015-12-10T00:00:00Z

Model of low frequency balun compared with lab measurements of S11 Rogers, Alan E.E.

2015-12-10T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154572 2024-05-04T03:00:39Z 2015-11-24T00:00:00Z

Simulations of the sensitivity to errors in balun loss parameters Rogers, Alan E.E.

2015-11-24T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154571 2024-05-04T03:21:00Z 2016-03-21T00:00:00Z

Estimate of the effect of the Earth ground under the ground plane Rogers, Alan E.E.

2016-03-21T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154570 2024-05-04T03:16:12Z 2015-11-17T00:00:00Z

Simulations of moisture on blade antenna Rogers, Alan E.E.

2015-11-17T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154569 2024-05-04T03:39:20Z 2015-11-04T00:00:00Z

High and low band comparisons Rogers, Alan E.E.

2015-11-04T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154568 2024-05-04T03:44:26Z 2015-11-02T00:00:00Z

Checks and cross-checks of EDGES calibration Rogers, Alan E.E.

2015-11-02T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154567 2024-05-04T03:41:31Z 2015-10-07T00:00:00Z

Simulations of error sources for EDGES-2 blade antenna Rogers, Alan E.E.

2015-10-07T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154566 2024-05-04T03:54:57Z 2015-09-21T00:00:00Z

EDGES Noise Rogers, Alan E.E.

2015-09-21T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154565 2024-05-04T04:07:45Z 2015-09-21T00:00:00Z

Excision of weak broadband RFI Signals Rogers, Alan E.E.

2015-09-21T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154564 2024-05-04T03:41:46Z 2015-09-14T00:00:00Z

Comparison of two methods for Galaxy calibration Rogers, Alan E.E.

2015-09-14T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154563 2024-05-04T03:26:40Z 2015-09-03T00:00:00Z

High band results using Blade antenna Rogers, Alan E.E.

2015-09-03T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154562 2024-05-04T03:36:07Z 2015-07-16T00:00:00Z

Limits set by the foreground due to frequency dependence of the beam Rogers, Alan E.E.

2015-07-16T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154561 2024-05-04T03:33:51Z 2015-06-02T00:00:00Z

Limits of EoR signature detection imposed by systematics Rogers, Alan E.E.

2015-06-02T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154560 2024-05-04T03:44:13Z 2015-05-20T00:00:00Z

FEKO tests of slot resonances Rogers, Alan E.E.

2015-05-20T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154559 2024-05-04T03:03:03Z 2015-05-13T00:00:00Z

Preliminary results for the period 18 April to 5 May 2015 Rogers, Alan E.E.

2015-05-13T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154558 2024-05-04T03:35:01Z 2015-04-21T00:00:00Z

Tests of low band antenna at Haystack Rogers, Alan E.E.

2015-04-21T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154557 2024-05-04T04:05:46Z 2015-04-21T00:00:00Z

Minor adjustments to LNA for improved S11 below 100 MHz Rogers, Alan E.E.

2015-04-21T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154556 2024-05-04T04:01:07Z 2015-04-14T00:00:00Z

Improving the LNA performance Rogers, Alan E.E.

2015-04-14T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154555 2024-05-04T03:31:54Z 2015-03-24T00:00:00Z

General trends in antenna design for constant beam Rogers, Alan E.E.

2015-03-24T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154554 2024-05-04T03:08:04Z 2015-03-10T00:00:00Z

Proposed design of low band antenna Rogers, Alan E.E.

2015-03-10T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154553 2024-05-04T03:22:55Z 2015-03-04T00:00:00Z

Estimated effect of moisture on EDGES antenna Rogers, Alan E.E.

2015-03-04T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154552 2024-05-04T03:03:37Z 2015-02-18T00:00:00Z

Preliminary results for January 2015 deployment Rogers, Alan E.E.

2015-02-18T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154551 2024-05-04T03:40:18Z 2015-02-18T00:00:00Z

Estimates of the flux and spectral index of the quiet Sun Rogers, Alan E.E.

2015-02-18T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154550 2024-05-04T03:55:06Z 2015-02-10T00:00:00Z

Study of feature at 115 MHz Rogers, Alan E.E.

2015-02-10T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154549 2024-05-04T03:16:33Z 2015-01-29T00:00:00Z

Tests of balun loss using active cold load Rogers, Alan E.E.

2015-01-29T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154548 2024-05-04T03:59:28Z 2015-01-14T00:00:00Z

EDGES2 error budget update Rogers, Alan E.E.

2015-01-14T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154547 2024-05-04T03:01:21Z 2015-01-05T00:00:00Z

Simulation of limits imposed by frequency structure in antenna beam Rogers, Alan E.E.

2015-01-05T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154546 2024-05-04T03:09:31Z 2015-06-08T00:00:00Z

Measurements of blade antenna prototype Rogers, Alan E.E.

2015-06-08T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154545 2024-05-04T03:42:01Z 2014-12-18T00:00:00Z

Changes to EDGES antenna to minimize frequency dependence of beam Rogers, Alan E.E.

2014-12-18T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154544 2024-05-04T03:39:43Z 2014-12-18T00:00:00Z

Comparison of Blade antenna for EDGES Rogers, Alan E.E.

2014-12-18T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154543 2024-05-04T03:52:40Z 2014-12-01T00:00:00Z

Frequency dependence of the EDGES antenna beam Rogers, Alan E.E.

2014-12-01T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154542 2024-05-04T04:11:18Z 2014-11-18T00:00:00Z

EDGES Antenna Beamshift Resonance Rogers, Alan E.E.

2014-11-18T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154541 2024-05-04T03:50:01Z 2014-11-05T00:00:00Z

Preliminary results from 2014 deployment Rogers, Alan E.E.

2014-11-05T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154540 2024-05-04T03:31:22Z 2014-10-07T00:00:00Z

Measurements of EDGES-2 high band balun loss Rogers, Alan E.E.

2014-10-07T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154539 2024-05-04T03:02:51Z 2014-09-22T00:00:00Z

Laboratory tests of air circulation cooling Rogers, Alan E.E.

2014-09-22T00:00:00Z Vierinen, Juha https://hdl.handle.net/1721.1/154538 2024-05-04T03:07:37Z 2014-09-16T00:00:00Z

Altitude dependent ionospheric absorption and electron temperature Vierinen, Juha

2014-09-16T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154537 2024-05-04T03:06:04Z 2015-05-20T00:00:00Z

Using Galactic noise variation to extract EoR revisited. Rogers, Alan E.E.

2015-05-20T00:00:00Z Monsalve, Raul Mozdzen, T. https://hdl.handle.net/1721.1/154536 2024-05-04T03:00:30Z 2014-07-31T00:00:00Z

Characterization of RFI at the UNR Gund Ranch Monsalve, Raul; Mozdzen, T.

2014-07-31T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154535 2024-05-04T03:49:42Z 2014-06-02T00:00:00Z

Weighted electron temperature in ionosphere from EDGES-2 data. Rogers, Alan E.E.

2014-06-02T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154534 2024-05-04T03:50:39Z 2014-05-05T00:00:00Z

Low order fits to the effect of antenna beam change. Rogers, Alan E.E.

2014-05-05T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154533 2024-05-04T03:01:21Z 2014-04-29T00:00:00Z

Spectral effects of LNA box on antenna beam. Rogers, Alan E.E.

2014-04-29T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154532 2024-05-04T03:35:19Z 2014-04-14T00:00:00Z

Effect of antenna resonances on beam pattern. Rogers, Alan E.E.

2014-04-14T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154531 2024-05-04T04:00:22Z 2014-03-20T00:00:00Z

Additive and multiplicative terms in foreground, ionosphere and antenna loss. Rogers, Alan E.E.

2014-03-20T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154530 2024-05-04T03:06:31Z 2014-03-18T00:00:00Z

EZNEC tests for ground plane and box cover resonances Rogers, Alan E.E.

2014-03-18T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154529 2024-05-04T03:03:08Z 2014-03-06T00:00:00Z

Iterative RFI Excision Rogers, Alan E.E.

2014-03-06T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154528 2024-05-04T03:58:44Z 2014-09-16T00:00:00Z

EDGES2 error budget Rogers, Alan E.E.

2014-09-16T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154527 2024-05-04T03:35:10Z 2014-02-07T00:00:00Z

Checks of VNA linearity Rogers, Alan E.E.

2014-02-07T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154526 2024-05-04T03:30:44Z 2014-12-25T00:00:00Z

Measurement of the loss of SOL standards Rogers, Alan E.E.

2014-12-25T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154525 2024-05-04T03:33:11Z 2014-01-22T00:00:00Z

Checks of SOL calibration standards Rogers, Alan E.E.

2014-01-22T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154524 2024-05-04T03:38:10Z 2014-01-15T00:00:00Z

Measurement of cable loss between LNA and antenna. Rogers, Alan E.E.

2014-01-15T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154523 2024-05-04T03:54:39Z 2014-01-13T00:00:00Z

Estimation of VNA accuracy for measurements antenna S11 Rogers, Alan E.E.

2014-01-13T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154522 2024-05-04T03:47:41Z 2014-01-09T00:00:00Z

Cross-check of HP85047A/8753C VNA accuracy Rogers, Alan E.E.

2014-01-09T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154521 2024-05-04T04:03:04Z 2013-12-16T00:00:00Z

Sensitivities of EDGES-2 to instrumental error Rogers, Alan E.E.

2013-12-16T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154520 2024-05-04T03:34:37Z 2013-12-10T00:00:00Z

Simple model for the temperature coefficient EDGES antenna S11 Rogers, Alan E.E.

2013-12-10T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154519 2024-05-04T03:17:12Z 2013-10-17T00:00:00Z

An examination of potential improvements Rogers, Alan E.E.

2013-10-17T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154518 2024-05-04T03:04:17Z 2013-11-26T00:00:00Z

Updated: Bench tests of cable loss between antenna and LNA Rogers, Alan E.E.

2013-11-26T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154517 2024-05-04T03:57:46Z 2013-11-26T00:00:00Z

The dependence the Roberts balun loss on antenna reflection phase Rogers, Alan E.E.

2013-11-26T00:00:00Z Monsalve, Raul https://hdl.handle.net/1721.1/154516 2024-05-04T03:53:46Z 2013-09-05T00:00:00Z

Effect of Error in the VNA Calibration Standards, on Measured Reflection Coeffient Monsalve, Raul

2013-09-05T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154515 2024-05-04T03:37:32Z 2013-09-09T00:00:00Z

Thermal control for above ground LNA box Rogers, Alan E.E.

2013-09-09T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154514 2024-05-04T04:11:36Z 2013-08-28T00:00:00Z

Effect of VNA phase errors Rogers, Alan E.E.

2013-08-28T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154513 2024-05-04T04:00:11Z 2013-07-23T00:00:00Z

Lab tests with long integrations Rogers, Alan E.E.

2013-07-23T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154512 2024-05-04T03:41:00Z 2013-07-11T00:00:00Z

Comparative tests of EDGES-2 electronics Rogers, Alan E.E.

2013-07-11T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154511 2024-05-04T03:42:30Z 2013-07-02T00:00:00Z

Thermal Control of EDGES front-end box Rogers, Alan E.E.

2013-07-02T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154510 2024-05-04T03:12:48Z 2013-07-08T00:00:00Z

Simulations of the removal of the foreground, ionosphere and frequency dependence of the beam Rogers, Alan E.E.

2013-07-08T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154509 2024-05-04T03:28:43Z 2013-06-17T00:00:00Z

Noise analysis of an imperfect attenuator Rogers, Alan E.E.

2013-06-17T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154508 2024-05-04T03:57:01Z 2017-01-30T00:00:00Z

Characteristics and stability of EDGES electronics Rogers, Alan E.E.

2017-01-30T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154507 2024-05-04T04:01:39Z 2013-04-24T00:00:00Z

Effect of a cable impedance deviation in loss estimate Rogers, Alan E.E.

2013-04-24T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154506 2024-05-04T03:31:30Z 2013-05-09T00:00:00Z

Measurements of VNA noise and simulations of their effect on EoR estimation Rogers, Alan E.E.

2013-05-09T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154505 2024-05-04T03:03:09Z 2015-04-07T00:00:00Z

Updated: Summary EDGES processing software Rogers, Alan E.E.

2015-04-07T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154504 2024-05-04T03:38:32Z 2013-04-22T00:00:00Z

Using EDGES to correct changes in antenna ref Rogers, Alan E.E.

2013-04-22T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154503 2024-05-04T03:04:46Z 2013-04-09T00:00:00Z

Tests of the phase and impedance stability of LDF2-50A heliax cable Rogers, Alan E.E.

2013-04-09T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154502 2024-05-04T03:46:26Z 2013-03-28T00:00:00Z

Effect of moving the reference point Rogers, Alan E.E.

2013-03-28T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154501 2024-05-04T04:03:43Z 2013-03-27T00:00:00Z

Some tests of cable stability for S11 measurements Rogers, Alan E.E.

2013-03-27T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154500 2024-05-04T03:39:51Z 2013-03-12T00:00:00Z

Proposed EDGES2 installation Rogers, Alan E.E.

2013-03-12T00:00:00Z Monsalve, Raul https://hdl.handle.net/1721.1/154499 2024-05-04T03:09:53Z 2013-03-05T00:00:00Z

Sensitivity of EDGES Antenna Propotype to Different Perturbations Monsalve, Raul

2013-03-05T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154498 2024-05-04T03:48:11Z 2013-01-31T00:00:00Z

Options and error estimates for EDGES-2 deployment Rogers, Alan E.E.

2013-01-31T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154497 2024-05-04T03:44:04Z 2013-01-23T00:00:00Z

Simulations of attenuation and delay between 3-position switch and LNA Rogers, Alan E.E.

2013-01-23T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154496 2024-05-04T03:17:51Z 2013-01-14T00:00:00Z

EDGES-2 Laboratory tests of absolute calibration Rogers, Alan E.E.

2013-01-14T00:00:00Z Monsalve, Raul https://hdl.handle.net/1721.1/154495 2024-05-04T03:02:45Z 2012-12-13T00:00:00Z

Stability measurements of VNA, coaxial cable, and antenna with Roberts balun Monsalve, Raul

2012-12-13T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154494 2024-05-04T03:58:13Z 2012-12-18T00:00:00Z

EDGES LNA Improvements Rogers, Alan E.E.

2012-12-18T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154493 2024-05-04T03:05:10Z 2013-08-27T00:00:00Z

Simulation of the removal of the foreground and ionosphere Rogers, Alan E.E.

2013-08-27T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154492 2024-05-04T03:15:31Z 2012-11-06T00:00:00Z

Estimate of the Spectral flatness of a hot filament source. Rogers, Alan E.E.

2012-11-06T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154491 2024-05-04T04:04:10Z 2012-10-16T00:00:00Z

Preliminary estimates of EDGES-2 error sources. Rogers, Alan E.E.

2012-10-16T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154490 2024-05-04T03:49:29Z 2013-01-07T00:00:00Z

Estimate of EDGES-2 Antenna loss Rogers, Alan E.E.

2013-01-07T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154489 2024-05-04T03:15:46Z 2012-09-19T00:00:00Z

Test of absolute accuracy of N5222A VNA Rogers, Alan E.E.

2012-09-19T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154488 2024-05-04T03:26:17Z 2012-10-10T00:00:00Z

Summary of EDGES-2 calibration and processing Rogers, Alan E.E.

2012-10-10T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154487 2024-05-04T03:06:31Z 2012-12-10T00:00:00Z

Updated:EDGES antenna design notes Rogers, Alan E.E.

2012-12-10T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154486 2024-05-04T03:51:52Z 2012-08-23T00:00:00Z

Set of basis functions needed to account for EDGES systematics Rogers, Alan E.E.

2012-08-23T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154485 2024-05-04T03:26:24Z 2012-09-12T00:00:00Z

Calibration and temperature corrections for high accuracy VNA measurements Rogers, Alan E.E.

2012-09-12T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154484 2024-05-04T03:13:16Z 2012-08-20T00:00:00Z

EDGES Temperature monitor Rogers, Alan E.E.

2012-08-20T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154483 2024-05-04T03:04:12Z 2012-08-16T00:00:00Z

Simulation of EDGES.2 systematic error Rogers, Alan E.E.

2012-08-16T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154482 2024-05-04T04:07:14Z 2012-08-07T00:00:00Z

Additional calibration steps for improving VNA accuracy Rogers, Alan E.E.

2012-08-07T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154481 2024-05-04T03:09:47Z 2012-11-06T00:00:00Z

Tests of prototype Fourpoint antenna with modified Roberts balun Rogers, Alan E.E.

2012-11-06T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154480 2024-05-04T03:52:55Z 2014-09-15T00:00:00Z

Effect of ground plane size on ground loss Rogers, Alan E.E.

2014-09-15T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154479 2024-05-04T03:59:03Z 2012-04-23T00:00:00Z

The Roberts balun Rogers, Alan E.E.

2012-04-23T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154478 2024-05-04T03:19:15Z 2012-03-29T00:00:00Z

Methods for improved calibration of VNA Rogers, Alan E.E.

2012-03-29T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154477 2024-05-04T03:32:12Z 2012-02-21T00:00:00Z

Tests of EDGES calibration Rogers, Alan E.E.

2012-02-21T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154476 2024-05-04T03:02:34Z 2012-02-07T00:00:00Z

Tests of VNA accuracy Rogers, Alan E.E.

2012-02-07T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154475 2024-05-04T03:28:42Z 2012-01-31T00:00:00Z

Low loss torodial air core balun Rogers, Alan E.E.

2012-01-31T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154474 2024-05-04T04:02:29Z 2011-12-21T00:00:00Z

A laboratory test of the absolute calibration using an antenna simulator Rogers, Alan E.E.

2011-12-21T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154473 2024-05-04T03:18:16Z 2011-12-06T00:00:00Z

Initial Lab tests of absolute calibration Rogers, Alan E.E.

2011-12-06T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154472 2024-05-04T03:33:29Z 2011-09-12T00:00:00Z

Absolute calibration of sky noise spectrum using a wideband antenna Rogers, Alan E.E.

2011-09-12T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154471 2024-05-04T03:02:36Z 2011-08-30T00:00:00Z

Temperature contribution of ionosphere to the sky noise spectrum Rogers, Alan E.E.

2011-08-30T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154470 2024-05-04T03:41:41Z 2011-08-11T00:00:00Z

Noise model for balun, antenna loss and ground pickup Rogers, Alan E.E.

2011-08-11T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154469 2024-05-04T03:30:38Z 2011-08-11T00:00:00Z

Calibration sensitivity to LNA and antenna parameter errors Rogers, Alan E.E.

2011-08-11T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154468 2024-05-04T04:09:27Z 2011-07-27T00:00:00Z

Noise wave analysis using reflection coefficients referenced to 50 ohms Rogers, Alan E.E.

2011-07-27T00:00:00Z Rogers, Alan E.E. Cele, D. https://hdl.handle.net/1721.1/154467 2024-05-04T03:04:26Z 2011-07-27T00:00:00Z

Tests of EDGES calibration at West Forks Maine Rogers, Alan E.E.; Cele, D.

2011-07-27T00:00:00Z Rogers, Alan E.E. Cele, D. https://hdl.handle.net/1721.1/154466 2024-05-04T03:05:21Z 2011-07-11T00:00:00Z

Sensitivity of antenna impedance to environment change Rogers, Alan E.E.; Cele, D.

2011-07-11T00:00:00Z Rogers, Alan E.E. Cele, D. https://hdl.handle.net/1721.1/154465 2024-05-04T03:58:43Z 2012-07-16T00:00:00Z

Updated: Spectral flatness of HP346C noise source Rogers, Alan E.E.; Cele, D.

2012-07-16T00:00:00Z Rogers, Alan E.E. Cele, D. https://hdl.handle.net/1721.1/154464 2024-05-04T03:44:36Z 2011-07-11T00:00:00Z

Balun model and measurements Rogers, Alan E.E.; Cele, D.

2011-07-11T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154463 2024-05-04T03:26:33Z 2012-03-29T00:00:00Z

Effect of antenna beam pattern on the detectability of EoR Rogers, Alan E.E.

2012-03-29T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154462 2024-05-04T03:35:48Z 2011-05-25T00:00:00Z

Effect of attenuation the sensitivity of EDGES to antenna match Rogers, Alan E.E.

2011-05-25T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154461 2024-05-04T03:35:31Z 2011-05-03T00:00:00Z

Optimization of EDGES Fourpoint antenna using FEKO Rogers, Alan E.E.

2011-05-03T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154460 2024-05-04T04:10:34Z 2011-03-16T00:00:00Z

Noise Diode Tests Rogers, Alan E.E.

2011-03-16T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154459 2024-05-04T03:58:01Z 2011-12-07T00:00:00Z

Additional systematics in EDGES electronics Rogers, Alan E.E.

2011-12-07T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154458 2024-05-04T03:51:35Z 2010-12-21T00:00:00Z

Extending the EDGES frequency range to cover 40 to 190 MHz Rogers, Alan E.E.

2010-12-21T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154457 2024-05-04T03:06:14Z 2010-10-27T00:00:00Z

Preliminary results of modeling EDGES Rogers, Alan E.E.

2010-10-27T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154456 2024-05-04T03:27:11Z 2010-10-06T00:00:00Z

Model fitting functions Rogers, Alan E.E.

2010-10-06T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154455 2024-05-04T04:02:15Z 2010-10-06T00:00:00Z

Simulation of performance with LNA calibration Rogers, Alan E.E.

2010-10-06T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154454 2024-05-04T03:57:52Z 2010-09-20T00:00:00Z

EDGES LNA Optimization Rogers, Alan E.E.

2010-09-20T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154453 2024-05-04T04:07:25Z 2010-09-16T00:00:00Z

Simulations of EoR with different fitting parameters Rogers, Alan E.E.

2010-09-16T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154452 2024-05-04T03:22:07Z 2010-06-10T00:00:00Z

Extending spectrometer frequency range Rogers, Alan E.E.

2010-06-10T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154451 2024-05-04T03:36:14Z 2010-03-12T00:00:00Z

Tests of long integration using AC240 Rogers, Alan E.E.

2010-03-12T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154450 2024-05-04T03:32:47Z 2010-12-04T00:00:00Z

RFI Statistics at Boolardy Rogers, Alan E.E.

2010-12-04T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154449 2024-05-04T03:52:21Z 2010-01-12T00:00:00Z

Simulations of EoR signature detection Rogers, Alan E.E.

2010-01-12T00:00:00Z Rogers, Alan E.E. Bowman, J.D. https://hdl.handle.net/1721.1/154448 2024-05-04T03:07:00Z 2010-01-08T00:00:00Z

Current limits of EDGES performance using DP310 Rogers, Alan E.E.; Bowman, J.D.

2010-01-08T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154447 2024-05-04T03:50:38Z 2009-12-15T00:00:00Z

More on using Galactic noise for calibration Rogers, Alan E.E.

2009-12-15T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154446 2024-05-04T03:45:30Z 2009-12-01T00:00:00Z

Meteor scatter rates Rogers, Alan E.E.

2009-12-01T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154445 2024-05-04T03:49:21Z 2009-11-23T00:00:00Z

Path loss needed to meet ITU RA769-1 Rogers, Alan E.E.

2009-11-23T00:00:00Z Rogers, Alan E.E. Bowman, J.D. https://hdl.handle.net/1721.1/154444 2024-05-04T03:54:58Z 2009-11-09T00:00:00Z

Measurements of the spectrum from 80 to 200 MHz in the Catlow Valley Oregon Rogers, Alan E.E.; Bowman, J.D.

2009-11-09T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154443 2024-05-04T03:45:46Z 2009-10-21T00:00:00Z

Tests of AC240 spectrometer using out of band added noise Rogers, Alan E.E.

2009-10-21T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154442 2024-05-04T03:37:08Z 2009-09-03T00:00:00Z

LNA Noise Correlation Rogers, Alan E.E.

2009-09-03T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154441 2024-05-04T03:58:26Z 2009-07-28T00:00:00Z

Model of the level of systematics in DP310 Rogers, Alan E.E.

2009-07-28T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154440 2024-05-04T03:58:15Z 2009-07-27T00:00:00Z

Using Galactic noise variation to extract EoR signatures (Revised) Rogers, Alan E.E.

2009-07-27T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154439 2024-05-04T04:00:50Z 2009-05-15T00:00:00Z

Further analysis of 2009 EDGES data from Boolardy Rogers, Alan E.E.

2009-05-15T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154438 2024-05-04T03:00:37Z 2009-05-27T00:00:00Z

Theoretical noise for 3-position switching using Acqiris DP310 Rogers, Alan E.E.

2009-05-27T00:00:00Z Bowman, J.D. https://hdl.handle.net/1721.1/154437 2024-05-04T04:04:40Z 2009-03-18T00:00:00Z

Deployment of EDGES prototype system at Murchison Radio-astronomy Observatory, Boolardy Station, Western Australia Bowman, J.D.

2009-03-18T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154436 2024-05-04T03:49:16Z 2009-01-16T00:00:00Z

Tests of EDGES DP310 12-bit ADC at Forks, Maine Rogers, Alan E.E.

2009-01-16T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154435 2024-05-04T04:01:56Z 2011-10-12T00:00:00Z

Balun with improved balance Rogers, Alan E.E.

2011-10-12T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154434 2024-05-04T03:35:08Z 2009-01-07T00:00:00Z

EDGES system using direct sampling 12-bit ADC Rogers, Alan E.E.

2009-01-07T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154433 2024-05-04T03:32:58Z 2008-10-28T00:00:00Z

Effects of digitizer non linearity Rogers, Alan E.E.

2008-10-28T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154432 2024-05-04T03:59:37Z 2008-07-10T00:00:00Z

Methods of smoothing spectra Rogers, Alan E.E.

2008-07-10T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154431 2024-05-04T03:03:19Z 2008-06-09T00:00:00Z

Tests of the global neutral hydrogen signature in the 60-150 MHz band Rogers, Alan E.E.

2008-06-09T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154430 2024-05-04T03:54:08Z 2008-02-05T00:00:00Z

Comparison of the MWA bowtie, shortwide and shortwide with stubs. Rogers, Alan E.E.

2008-02-05T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154429 2024-05-04T03:01:40Z 2007-12-13T00:00:00Z

Arrays with MWAS and modified MWA Antennas Rogers, Alan E.E.

2007-12-13T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154428 2024-05-04T03:59:54Z 2007-09-18T00:00:00Z

Expected performance of a narrowband “frequency cycled” system. Rogers, Alan E.E.

2007-09-18T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154427 2024-05-04T03:01:06Z 2007-09-14T00:00:00Z

Some notes on various switching schemes Rogers, Alan E.E.

2007-09-14T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154426 2024-05-04T04:02:11Z 2007-08-09T00:00:00Z

Local oscillator frequency cycling Rogers, Alan E.E.

2007-08-09T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154425 2024-05-04T04:01:13Z 2007-06-04T00:00:00Z

Tests of MWA antenna modification Rogers, Alan E.E.

2007-06-04T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154424 2024-05-04T03:41:47Z 2007-06-04T00:00:00Z

MWA active antenna noise simulations Rogers, Alan E.E.

2007-06-04T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154423 2024-05-04T03:59:36Z 2007-06-01T00:00:00Z

Measurements of MWA antenna impedance Rogers, Alan E.E.

2007-06-01T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154422 2024-05-04T03:44:25Z 2007-06-01T00:00:00Z

Tests of MWA LNAs Rogers, Alan E.E.

2007-06-01T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154421 2024-05-04T03:59:50Z 2002-04-13T00:00:00Z

New inexpensive approach to EDGES and SRT spectrometers Rogers, Alan E.E.

2002-04-13T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154420 2024-05-04T03:42:50Z 2007-02-05T00:00:00Z

Satellite signals in the 100 to 200 MHz band Rogers, Alan E.E.

2007-02-05T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154419 2024-05-04T03:38:27Z 2007-02-05T00:00:00Z

Defects in ADCs evident in long integrations Rogers, Alan E.E.

2007-02-05T00:00:00Z Rogers, Alan E.E. Bowman, J.D. https://hdl.handle.net/1721.1/154418 2024-05-04T03:42:14Z 2006-12-13T00:00:00Z

Deployment of EDGES at Mileura Station, Western Australia Rogers, Alan E.E.; Bowman, J.D.

2006-12-13T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154417 2024-05-04T03:18:24Z 2006-12-18T00:00:00Z

EDGES data analysis Rogers, Alan E.E.

2006-12-18T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154416 2024-05-04T03:30:22Z 2006-11-21T00:00:00Z

Using EDGES spectrometer to measure the antenna reflection coefficient Rogers, Alan E.E.

2006-11-21T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154415 2024-05-04T03:01:23Z 2006-11-02T00:00:00Z

Estimate of ripple due to common mode reflections on cable to LNA. Rogers, Alan E.E.

2006-11-02T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154414 2024-05-04T03:19:58Z 2006-09-08T00:00:00Z

Evaluation of EDGES at West Forks, Maine Rogers, Alan E.E.

2006-09-08T00:00:00Z Bowman, J.D. https://hdl.handle.net/1721.1/154413 2024-05-04T03:05:22Z 2006-11-02T00:00:00Z

Comparison of Galactic Noise at Potential EDGES Sites Bowman, J.D.

2006-11-02T00:00:00Z Bowman, J.D. https://hdl.handle.net/1721.1/154412 2024-05-04T03:05:41Z 2006-11-02T00:00:00Z

EDGES Sensitivity to Galactic Radio Recombination Lines Bowman, J.D.

2006-11-02T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154411 2024-05-04T03:06:40Z 2006-08-28T00:00:00Z

Noise and error sources in 3 position switching Rogers, Alan E.E.

2006-08-28T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154410 2024-05-04T03:13:15Z 2006-08-17T00:00:00Z

Absolute sky calibration using EDGES Rogers, Alan E.E.

2006-08-17T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154409 2024-05-04T03:27:34Z 2006-08-07T00:00:00Z

Improved input match for low frequency LNA Rogers, Alan E.E.

2006-08-07T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154408 2024-05-04T03:15:19Z 2006-07-25T00:00:00Z

Correction antenna temperature for cable attenuation and antenna mismatch Rogers, Alan E.E.

2006-07-25T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154407 2024-05-04T03:53:00Z 2006-07-20T00:00:00Z

EDGES and AC240 RFI monitor parameters Rogers, Alan E.E.

2006-07-20T00:00:00Z Bowman, J.D. https://hdl.handle.net/1721.1/154406 2024-05-04T04:02:08Z 2006-06-29T00:00:00Z

VSWR Measurements of four-point dipole antenna for EDGES Bowman, J.D.

2006-06-29T00:00:00Z Bowman, J.D. https://hdl.handle.net/1721.1/154405 2024-05-04T03:26:03Z 2006-11-02T00:00:00Z

RFI Scout Trip to California and Nevada Bowman, J.D.

2006-11-02T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154404 2024-05-04T03:27:00Z 2006-03-02T00:00:00Z

Absolute calibration of an active antenna Rogers, Alan E.E.

2006-03-02T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154403 2024-05-04T03:50:35Z 2006-02-14T00:00:00Z

Absolute calibration of an active antenna Rogers, Alan E.E.

2006-02-14T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154402 2024-05-04T03:08:18Z 2006-02-07T00:00:00Z

Model of active antenna noise Rogers, Alan E.E.

2006-02-07T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154401 2024-05-04T03:00:28Z 2006-02-03T00:00:00Z

Active antenna for spectrum monitor and EOR Rogers, Alan E.E.

2006-02-03T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154400 2024-05-04T03:00:47Z 2006-02-03T00:00:00Z

Dipole beam change with frequency Rogers, Alan E.E.

2006-02-03T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154399 2024-05-04T03:14:54Z 2007-01-01T00:00:00Z

Tests of active antenna for RFI monitor Rogers, Alan E.E.

2007-01-01T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154398 2024-05-04T03:35:27Z 2006-01-24T00:00:00Z

Effect of the frequency of the beam patterns on EOR signature Rogers, Alan E.E.

2006-01-24T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154397 2024-05-04T03:39:09Z 2006-01-11T00:00:00Z

RFI avoidance by lowering the antenna Rogers, Alan E.E.

2006-01-11T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154396 2024-05-04T03:39:34Z 2006-01-04T00:00:00Z

Development of sensitive compact RFI/EOR monitor Rogers, Alan E.E.

2006-01-04T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154395 2024-05-04T04:08:26Z 2006-01-04T00:00:00Z

Estimate of systematic errors in search for EOR global step Rogers, Alan E.E.

2006-01-04T00:00:00Z Rogers, Alan E.E. https://hdl.handle.net/1721.1/154394 2024-05-04T03:13:04Z 2005-12-20T00:00:00Z

Proposed filter for detection of EOR spectral ramp Rogers, Alan E.E.

2005-12-20T00:00:00Z Evans, J. V. Holt, J. M. Oliver, W. L. Wand, R. H. https://hdl.handle.net/1721.1/97679 2019-04-12T12:52:35Z 1982-09-01T00:00:00Z

Studies of the Midlatitude and High Latitude Ionosphere from Millstone Hill during Solar Maximum Conditions Evans, J. V.; Holt, J. M.; Oliver, W. L.; Wand, R. H. This report summarizes the work carried out at the Millstone Hill radar from April 1979 through March 1982 in studies of the earth's upper atmosphere and ionosphere with the support furnished by the National Science Foundation (Grant ATM-79-09189). Most notable were new studies of the auroral and subauroral regions of the ionosphere using a scanning technique in which the 1° beam of the UHF steerable radar is scanned at a fixed elevation (typically 4°) through 180° or 360° azimuth. This technique provides maps of the electron density, electron and ion temperatures and line-of-sight drifts at fixed altitudes as functions of invariant latitude and local time. These show a rich variety of behavior depending upon magnetic activity and season. In particular, the nighttime trough frequently is found to appear first in mid-afternoon at latitudes where the ion drift is high and sunward. Later the trough usually is found equatorwards of regions of fast convection. It is suggested that troughs may be manufactured in regions of rapid flow during substorms and then corotate with the earth as 'fossils' once the electric fields have diminished. Other studies reported herein include the analysis of the daily mean temperature, and the semidurnal temperatures and winds in the lower thermosphere as well as studies of the exospheric temperature. The report includes a detailed account of the improvements made in both the hardware and the software at the radar during the three-year period.

1982-09-01T00:00:00Z Evans, J. V. Holt, J. M. https://hdl.handle.net/1721.1/97678 2019-04-12T13:25:13Z 1982-01-01T00:00:00Z

Millstone Hill Thomson Scatter Results for 1974 Evans, J. V.; Holt, J. M. During 1973, the vertically-directed incoherent scatter radar at Millstone Hill (42.6°N, 71.5°W) was employed to measure electron density, electron and ion temperature and vertical ion velocity in the F-region over periods of 24 hours one or two times per month. The observations spanned the height interval 200-900 km approximately, and achieved a time resolution of about 30 minutes. This report presents the results of the measurements made using single long pulses in a set of contour diagrams. The behavior observed during these observations is discussed briefly in terms of the diurnal, seasonal, sunspot cycle, and magnetic disturbance variations reported previously and which now are believed to be largely understood.

1982-01-01T00:00:00Z Evans, J. V. Babcock, R. R., Jr. Holt, J. M. https://hdl.handle.net/1721.1/97677 2019-04-11T10:23:06Z 1979-10-22T00:00:00Z

Millstone Hill Thomson Scatter Results for 1973 Evans, J. V.; Babcock, R. R., Jr.; Holt, J. M. During 1973, the vertically-directed incoherent scatter radar at Millstone Hill (42.6°N, 71.5°W) was employed to measure electron density, electron and ion temperature and vertical ion velocity in the F-region over periods of 24 hours one or two times per month. The observations spanned the height interval 200-900 km approximately, and achieved a time resolution of about 30 minutes. This report presents the results of these measurements in a set of contour diagrams. For a number of the days, the results have been used to derive the diurnal variation of the temperature of the neutral atmosphere above 300 km (the exospheric temperature) as well as the speed of the neutral wind in the magnetic meridian plane at this altitude. These results were used to define a model for the pressure variation in the thermosphere over Millstone whose E-W variation is set by the observed temperature variation, and whose N-S variation was adjusted to reproduce the observed winds calculated by solving momentum equations for the neutral air. These results, together with similar results obtained using data gathered over the six-year period 1970-1975 have been used in a study of the seasonal and sunspot cycle variation of the mean meridional and zonal winds. Also reported are the results of a study of the effect of magnetic storms on the thermospheric winds observed over Millstone Hill.

1979-10-22T00:00:00Z Evans, J. V. Holt, J. M. Oliver, W. L. Wand, R. H. https://hdl.handle.net/1721.1/97676 2019-04-12T13:25:13Z 1979-09-01T00:00:00Z

Studies of the Midlatitude and High Latitude Ionosphere from Millstone Hill April 1976 - March 1979 Evans, J. V.; Holt, J. M.; Oliver, W. L.; Wand, R. H. During the period 1 April 1976 through 31 March 1979, the Millstone Hill radar facility in Westford, Massachusetts (42° N, 71.5° W) was supported for incoherent scatter studies of the earth's upper atmosphere and ionosphere by the National Science Foundation under Grant ATM 75-22193. This report describes the work carried out under this grant.

1979-09-01T00:00:00Z Oliver, W. L. Salah, J. E. Wand, R. H. Evans, J. V. https://hdl.handle.net/1721.1/97675 2019-04-12T13:25:10Z 1979-02-23T00:00:00Z

Incoherent Scatter Measurements of E- and F-Region Density, Temperatures, and Collision Frequency at Millstone Hill Oliver, W. L.; Salah, J. E.; Wand, R. H.; Evans, J. V. The Millstone Hill incoherent (Thomson) scatter radar system has been operated since 1963 to perform a synoptic study of F2-region electron densities, and electron and ion temperatures. These measurements have been conducted by transmitting single long pulses and performing digital sweep integration and spectrum analysis of the reflected signals. This report describes changes made to the system in 1969 to permit extensions of the measurements to altitudes below 200 km (i.e., the E- and F1-regions). These changes include modifications to the radar timing equipment to permit the transmission of close-spaced pairs of pulses from which the echo autocorrelation function can be determined in the computer by processing appropriately spaced pairs of echo samples. By operating the radar coherently, it has also been possible to subtract the unwanted (stronger) clutter signals from the ionospheric echoes. Samples are presented of the results that can now be obtained from these programs.

1979-02-23T00:00:00Z Evans, J. V. Holt, J. M. https://hdl.handle.net/1721.1/97674 2019-04-12T13:25:09Z 1978-09-18T00:00:00Z

Millstone Hill Thomson Scatter Results for 1972 Evans, J. V.; Holt, J. M. During 1972, the vertically directed incoherent scatter radar at Millstone Hill (42.6°N, 71.5°W) was employed to measure electron density, electron and ion temperatures, and vertical ion velocity in the F-region over periods of 24 hours, one or two times per month. The observations spanned the height interval 200 to 900 km, approximately, and achieved a time resolution of about 30 minutes. This report presents the results of these measurements in a set of contour diagrams. For a number of the days, the spectra of the signals gathered at altitudes between 450 and 1125 km have been the subject of further analysis in an effort to determine the percentage of H[superscript +] ions present over Millstone. The results suggest that H[superscript +] ions are escaping from the F-region to the magnetosphere at a value close to the theoretical limiting flux during the daytime in all seasons. At night the flux becomes downward commencing near midnight in winter, but may remain upward throughout the night in summer.

1978-09-18T00:00:00Z Evans, J. V. Emery, B. A. Holt, J. M. https://hdl.handle.net/1721.1/97673 2019-04-12T13:25:13Z 1978-03-24T00:00:00Z

Millstone Hill Thomson Scatter Results for 1971 Evans, J. V.; Emery, B. A.; Holt, J. M. During 1971, the incoherent scatter radar at Millstone Hill (42.6°N, 71.5°W) was employed to measure the electron density, electron and ion temperatures, and the vertical velocity of the 0[superscript +] ions in the F-region over periods of 24 hours on 20 days. The observations spanned the height interval 200 to 900 km, approximately, and achieved a time resolution of about 30 minutes. This report presents these results, after smoothing as a set of machine-drawn contour plots. The report discusses the behavior observed in 1971 in light of that seen in previous years. A significant number of days appear to have been disturbed by large traveling ionospheric disturbances. Results for the average exospheric temperature, the mean meridional, and zonal winds for 1970and 1971 derived from these incoherent scatter measurements in a separate study by B.A. Emery are summarized here for completeness. The results appear to confirm the mean wind behavior that would be predicted by the recent Mass-Spectrometer, Incoherent-Scatter (MSIS) global model for the thermosphere and support the view that interhemispheric transport of light neutral constituents (e.g., atomic oxygen) gives rise to tie anomalous seasonal behavior of the ionosphere at midlatitudes.

1978-03-24T00:00:00Z Evans, J. V. Holt, J. M. https://hdl.handle.net/1721.1/97672 2019-04-11T04:32:21Z 1976-05-11T00:00:00Z

Millstone Hill Thomson Scatter Results for 1970 Evans, J. V.; Holt, J. M. During 1970, the incoherent scatter radar at Millstone Hill (42.6°N, 71.5°W) was employed to measure the electron density, electron and ion temperatures, and vertical velocity of the ions in the F-region over periods of 24 hours on an average of twice per month. The observations spanned the height interval 200 to 900 km, approximately, and achieved a time resolution of about 30 minutes. This report presents the results of these measurements in a set of contour diagrams. Commencing with the data presented in this report, a method of data reduction has been used which supersedes the older one of constructing the contour diagrams by hand. In the new method the set of points for any given parameter is matched by a two-dimensional polynomial surface in a least-squares fit. The program that carries this out is described fully in the report. By obtaining a continuous analytical description of the data with respect to height and time, machine-drawn contouring becomes possible and is now employed. The new program also provides a means of transferring the results to other users in machine-readable form. In addition, the new program yields a more repeatable smoothing of the data with respect to height and time, thereby allowing parameters that depend upon gradients (e.g., heat and particle fluxes) to be estimated more accurately.

1976-05-11T00:00:00Z Evans, J. V. https://hdl.handle.net/1721.1/97671 2019-04-11T07:52:43Z 1974-07-23T00:00:00Z

Millstone Hill Thomson Scatter Results for 1969 Evans, J. V. This report summarizes the results for the electron-density distribution, electron and ion temperatures, and vertical ionization fluxes in the F-region obtained during 1969 using the Millstone Hill (42.6°N, 71.5°W) Thomson (incoherent) scatter radar system. These data, for the height interval approximately 200 to 900 km, were gathered over 24-hour observing periods, roughly twice per calendar month. The time resolution to obtain results over this entire height interval was either 30 or 45 minutes, depending upon which of two operating modes was employed. The results for the diurnal variation of the electron density and temperature exhibit the characteristic summer and winter patterns discussed previously. The transition between the two takes place in April and October. Two cases of overhead auroral precipitation were observed during the year as a consequence of efforts to observe a stable red arc. Other instances of geomagnetically disturbed behavior were infrequent. Vertical fluxes of ionization were measured, and the flux escaping to the magnetosphere near midday was found to have an average value of ~5 x 10[superscript 7] el/cm[superscript 2]/sec. Near midnight, the magnetosphere appears to supply the local ionosphere with a flux of about half this amount..

1974-07-23T00:00:00Z Evans, J. V. https://hdl.handle.net/1721.1/97670 2019-04-11T10:23:05Z 1973-01-23T00:00:00Z

Millstone Hill Thomson Scatter Results for 1968 Evans, J. V. This report summarizes the results for the electron density distribution, electron and ion temperatures in the F-region obtained during 1968 using the Millstone Hill (42.6°N, 71.5°W) Thomson (incoherent) scatter radar system. These data, for the height interval approximately 200 to 800 km, were gathered over 24-hour observing periods, roughly twice per calendar month. The time required to obtain a complete electron density and temperature profile over this height interval was usuaIly 30 minutes. During 1968 the apparatus employed to measure the frequency spectrum of the reflected signals vs altitude, which in turn yields the estimates of the electron and ion temperatures, was rebuilt permitting the measurements at all altitudes to be made in real time, and with greater accuracy than heretofore. In addition, the new spectrum analyzer permitted the first measurements at Millstone Hill of the vertical drift of the plasma. These results, which are difficult to condense into summary form, are not included in the report. The density and temperature results show that the separate clear patterns of summer and winter diurnal behavior, recognized at sunspot minimum, can still be discerned at sunspot maximum on all but very disturbed days. A number of disturbance patterns observed previously were again detected in 1968, albeit on fewer occasions than in 1967. Apparently, by chance, the days selected for observation in 1968 contained fewer instances of magnetic disturbance than in 1967. The average heat flux from the magnetosphere has been investigated. While there appears to be a clear dependence on solar flux (as defined by the 10.7-cm radio emission), there remains a summer-to-winter variation of 5 to 7 that cannot be easily explained.

1973-01-23T00:00:00Z Evans, J. V. https://hdl.handle.net/1721.1/97669 2019-04-10T18:06:48Z 1971-07-22T00:00:00Z

Millstone Hill Thomson Scatter Results for 1967 Evans, J. V. This report summarizes results for the electron density distribution and electron temperature of the F-region obtained during 1967 using the Millstone Hill (42.6“N, 71.5°W) Thomson (incoherent) scatter radar system. These data, for the height interval of approximately 200 to 800 km, were gathered over 24-hour observing periods twice per calendar month. The time required to obtain a complete electron density and temperature profile over this height interval was 30 minutes. The results show a far wider range of behavior than that encountered in previous years. This is attributed to the increase in magnetic activity as sunspot maximum is approached. On magnetically quiet days, the characteristic behavior observed previously for electron density manifests itself. Winter days exhibit a maximum at all levels near noon and a weaker maximum at the layer peak in the early morning (0200 to 0400 EST), while summer days exhibit a maximum near sunset and only a small day-to-night change in density near the layer peak. Two days exhibited a pattern of behavior, first noted in 1965, that appears characteristic of many storms. This consists of an increase in density on the afternoon of the first day of the storm followed by a marked decrease the next morning. Other days show instances of nocturnal heating and erratic behavior of the F-region electron density at night. We believe that on several occasions in 1967 the plasmapause boundary moved south of Millstone giving rise to a rapid fall in f[subscript o]F2 and to much of the irregular behavior observed at night.

1971-07-22T00:00:00Z Evans, J. V. https://hdl.handle.net/1721.1/97668 2019-04-11T04:30:36Z 1971-01-19T00:00:00Z

Millstone Hill Thomson Scatter Results for 1966 Evans, J. V. This report presents F-region electron densities and electron temperatures observed during the year 1966 at the Millstone Hill Radar Observatory (42.6°N, 71.5°W) by the UHF Thomson (incoherent) scatter radar. The measurements were usually made for periods of 24 hours twice per month, and covered the altitude range 150 to 750 km approximately. The time required to collect all the measurements spanning this height interval was 30 minutes, i.e., half that of previous years. The results exhibit a greater amount of random time variation than seen heretofore, partly as a result of the better time resolution achieved and partly because each day has been analyzed individually, i.e., we have discontinued the practice of computing only the monthly mean behavior. We believe, however, that the largest part of the random variation is real and results from fluctuations in the solar EUV flux, which increase in magnitude as the sunspot number rises. Also, we expect a growing incidence of fluctuations produced by large-scale traveling ionospheric disturbances as we approach sunspot maximum. Despite this variability, the characteristics “winter” and “summer” type behavior reported for Millstone in previous years is clearly recognizable. On four days in which pronounced effects due to geomagnetic storms are evident, the layer rose to great heights in the late afternoon and achieved an abnormally high density (and lower-than-normal temperature). The reverse behavior was encountered the next morning. This sequence is similar to that first seen in June 1965, and its interpretation in terms of current ideas is summarized.

1971-01-19T00:00:00Z Evans, J. V. Julian, R. F. Reid, W. A. https://hdl.handle.net/1721.1/97667 2019-04-12T13:25:09Z 1970-02-06T00:00:00Z

Incoherent Scatter Measurements of F-Region Density, Temperatures, and Vertical Velocity at Millstone Hill Evans, J. V.; Julian, R. F.; Reid, W. A. The Millstone Hill Thomson (incoherent) scatter radar system has been operated routinely since 1963 to perform a synoptic study of F-region electron densities, and electron and ion temperatures. This report describes system changes made in 1968 which considerably increased the accuracy of the measurements and allowed their extension to higher altitudes. These changes have also made it impossible to measure the vertical velocity of the plasma over the altitude range 450 to 900 km to an accuracy on the order of 5 to 10 m/sec, depending upon altitude and time of day. Of even greater significance, complete machine reduction of the results is now possible so that considerable savings in time and effort have been secured in analyzing the data. The new system permits all the radar data to be gathered in the digital computer in real time, thereby eliminating the need for post real-time processing of magnetic-tape recordings of the signals. Furthermore, it is now possible to transmit the data to other workers in computer-usable form. This report describes the main functions of the computer program required to analyze the measurements, and lists the times of all measurements made with the new system prior to 1 January 1970. Examples of these results are presented and discussed.

1970-02-06T00:00:00Z Evans, J. V. https://hdl.handle.net/1721.1/97666 2019-04-12T13:25:08Z 1969-12-08T00:00:00Z

Millstone Hill Thomson Scatter Results for 1965 Evans, J. V. This report presents F-region electron densities, and electron and ion temperatures observed during the year 1965 at the Millstone Hill Radar Observatory (42.6°N. 71.5“W) by the UHF Thomson (incoherent) scatter radar. The measurements were made over 48-hour periods that were usually scheduled to include the International Geophysical World days near the center of each month. Geomagnetic storm sudden commencements occurred during two of the observing periods, but do not appear to have given rise to marked variation of the densities or temperatures. On the other band, measurements made during the progress of a major storm (15-19 June 1965) exhibit large changes compared with the behavior observed in the following month. The remaining months were magnetically quiet, and the density and temperature behavior were similar to those observed in 1964. Millstone is a midlatitude station exhibiting a characteristic “winter” and "summer” daytime density variation. The transition between these two types occurs rapidly around equinox, without any corresponding seasonal change in the F-region thermal structure. Current ideas concerning the mechanisms responsible for this and other features of diurnal and seasonal variations arc discussed.

1969-12-08T00:00:00Z Evans, J. V. https://hdl.handle.net/1721.1/97665 2019-04-12T13:25:08Z 1967-11-15T00:00:00Z

Millstone Hill Thomson Scatter Results for 1964 Evans, J. V. Thomson scatter (incoherent backscatter) observations of the ionosphere were made at Millstone Hill at a wavelength of 68 cm during 1964, for 30-hour periods every two weeks. These data have been employed to derive the mean hourly F-region (200 to 700 km) electron density profile and electron and ion temperature curves in each month. The results are presented in this report, together with the derived seasonal variation of electron density (at 0600, 1200, 1800 and 2400 hours local time) and the average daytime (0900 to 1500) and nighttime (2100 to 0300) electron and ion temperature behavior. Separate measurements with a 23-cm radar permitted the temperature results reported to be extended to lower altitudes (~130 km) and, in addition, provided information concerning the ionic constituents between 130 and 230 km. Although 1964 was at sunspot minimum, the seasonal variation in f[subscript o]F2 was quite evident. It is shown that this feature is strictly associated with the peak of the layer and that densities above 400-km altitude are highest at the equinoxes. No seasonal variations of temperature are found which might be large enough to account for the phenomenon. At night the peak densities are highest in summer, and the temperatures at all altitudes highest in winter. This last effect is believed largely due to heat conducted from the protonosphere, which in winter continues to be heated by photoelectron escape from the conjugate ionosphere which remains sunlit throughout the night.

1967-11-15T00:00:00Z Evans, J. V. https://hdl.handle.net/1721.1/97664 2019-04-11T10:23:02Z 1965-01-22T00:00:00Z

Ionospheric Backscatter Observations at Millstone Hill Evans, J. V. Studies of the electron-density, eIectron and ion temperatures in the F-region were mode by means of ground-based radar observations at the MilIstone Hill Radar Observatory. A 70-meter parabolic antenna directed vertically and a 2.5-Mw pulse radar operating at 440 Mcps were employed for these measurements which were conducted for periods of 30 hours at approximately weekly intervals throughout 1963. Examination of the echo power as a function of height leads to a profile of electron density with height, provided the electron and ion temperatures are the same (T[subscript e] = T[subscript i]). Additional measurements of the spectra of the signals corresponding to different heights permit the ratio T[subscript e]/T[subscript i] to be determined and, where this is different from unity, the observed profile can then be corrected for the effect on the scattering introduced by the inequality in temperature. Results of observations extending over a period of one year from February 1963 to January 1964 are presented. The ratio T[subscript e]/T[subscript i] achieved a maximum value ~2.0 to 2.6 at a height of about 300 km soon after dawn, irrespective of the season. There was Iittle change in height dependence in this ratio throughout the daylight hours, and at sunset the ratio felI with a time constant of the order of an hour. At night T[subscript e]/T[subscript i] was occasionally close to unity, but more often a significant difference remained in the temperatures at all heights. Ion temperature increased with height at all times, but above 500 km this may be due in part to the presence of an unknown amount of He[superscript +] ions, which considerably affects the interpretation of the signal spectra. Electron temperatures were largely independent of height above about 300 km. Evidence is presented of ionospheric heating during magnetically disturbed conditions, but it is shown that this is only of great importance at night.

1965-01-22T00:00:00Z Evans, J. V. https://hdl.handle.net/1721.1/97662 2019-04-12T12:50:45Z 1962-07-24T00:00:00Z

Studies of the F-Region by the Incoherent Backscatter Method Evans, J. V. The Millstone Hill radar facility operated by M.I.T. Lincoln Laboratory has made measurements of the distribution of electrons in the F-region of the ionosphere by observing the weak incoherent backscatter signal. These measurements were first made early in 1960 and were continued throughout 1961 on a routine basis at least once a week. This report presents alI the electron density profiles measured up to the end of 1961. Results of spectral analyses of the signals made early in 1962 are also given. The distribution of electrons above the peak of the F-region has been a subject of special study. On the basis of the results obtained to date the conclusions reached are: (a) the scale height of the electron density increases with height, (b) the ion temperature is not very dependent on height, though it does show a marked diurnal variation, (c) the election-to-ion temperature ratio is 1:1 during the hours of darkness, but during the daytime it increases too peak value ~1.6:1 around noon and (d) the scattering cross section for the electrons is close to the expected value when alIowance is made for (c).

1962-07-24T00:00:00Z