EDGES Memos

See also: MIT EDGES Memo Series

#DateTitleAuthorsVersion
12013/05/02Propagation of Instrumental Errors to the Sky Temperature MeasurementRaul Monsalve0
22013/05/14First Measurement of Antenna using Mechanical SwitchRaul Monsalve0
32013/05/22Measurement of Antenna using Air-dielectric Adapters and No Teflon in TunerRaul Monsalve0
42013/06/20Quick Look at Changes in Antenna Reflection Coefficient When Applying Heat with Heat GunsRaul Monsalve0
52013/07/11Measurement of Antenna (Aluminum Base)Raul Monsalve0
62013/07/13Revisiting the Calibration MethodRaul Monsalve0
72013/07/18VNA Accuracy TestRaul Monsalve0
82013/07/21VNA Accuracy Test 2Raul Monsalve0
92013/07/26Heating and Cooling TestRaul Monsalve0
102013/08/01Sensitivity of Antenna to Different PerturbationsRaul Monsalve0
112013/08/01VNA Accuracy Test 3Raul Monsalve0
122013/08/07Effect of Loss on VNA Calibration StandardsRaul Monsalve0
132013/08/11New Antenna Measurements With and Without the ShieldRaul Monsalve0
142013/08/12Cross-check of Short and Open StandardsRaul Monsalve0
152013/08/15Antenna Measurements in a Softball FieldRaul Monsalve0
162013/08/22Ground Plane Test in the Softball FieldRaul Monsalve0
172013/08/29Effect of Error in Open and Short Standards on Measurement of AttenuatorRaul Monsalve0
182013/09/28Using a Labjack U3 with Python on LinuxRaul Monsalve0
192013/10/02Temperature Coefficients for DC Resistance of Match and Reference AttenuatorsRaul Monsalve0
202013/10/03Cross-Check Between Short StandardsRaul Monsalve0
212013/10/23Correction of Reflection Coefficient of 10-dB Attenuator Measured with a FieldFox VNARaul Monsalve0
222013/10/23Correction of Reflection Coefficient of 6-dB Attenuator Measured with a FieldFox VNARaul Monsalve0
232013/11/13Status of the EDGES Antenna at the Site After Deployment of November 2013Raul Monsalve0
242013/11/14Quick Look at Antenna S11 Data Taken at BoolardyRaul Monsalve0
252013/11/21Linear Antenna Dependence on TemperatureRaul Monsalve0
262013/11/27Performance of Antenna Measurement SetupRaul Monsalve0
272014/01/13EDGES-2 Base Plate DrawingRaul Monsalve0
282013/07/15Top Plate Heating ExperimentTom Mozdzen0
292013/08/28Impact of Polystyrene Box on AntennaTom Mozdzen0
302013/09/06Effect of LNA Box on AntennaTom Mozdzen0
312013/09/12Effect of LNA Box on Antenna - UPDATETom Mozdzen0
322013/09/16Performance of Different Top Plate DesignsTom Mozdzen0
332013/11/20Simulation of Antenna Panels with FEKO and CSTTom Mozdzen0
342013/12/08Study of FEKO Meshing for Antenna PanelsTom Mozdzen0
352014/05/02Toward an Accurate Calibration of EDGES Using Temperature ReferencesRaul Monsalve0
362014/05/12Toward an Accurate Calibration of EDGES Using Temperature References: IIRaul Monsalve0
372014/05/30First Look at Good-Quality EDGES DataRaul Monsalve0
382014/06/11Correction of EDGES Data using CST BeamRaul Monsalve0
392014/06/23Comparison Between Global Sky Model and Haslam Map when Convolved with FEKO BeamRaul Monsalve0
402014/06/30Choosing a Test Network for the Forward-Reverse Method of VNA Standard CharacterizationRaul Monsalve0
412014/07/07Studying the Forward-Reverse Method Through SimulationsRaul Monsalve0
422014/07/13Studying the Forward-Reverse Method Through Simulations: IIRaul Monsalve0
432014/08/18Characterization of SPDT RF SwitchRaul Monsalve0
442014/10/30Developments at ASU for the EDGES Deployment of October 2014Raul Monsalve0
452014/11/05S11 Measurements Before and During the EDGES Deployment of October2014Raul Monsalve0
462014/08/18CST Simulation Results Using the New Top Cap DesignTom Mozdzen0
472014/09/05Finite Ground Screen Effects Upon Below Horizon ResponseTom Mozdzen0
482014/09/09Finite Ground Screen Effects Upon Below Horizon Response - Supplemental UpdateTom Mozdzen0
492013/08/22Farfield Vertical Gain Component at the Horizon with and without a ShieldTom Mozdzen0
502014/02/27Ground Pickup From a Seven Degree HorizonTom Mozdzen0
512014/11/08Balun Side View Vertical StackupTom Mozdzen0
522014/11/10Antenna S11 Measured Between Nov 07 and 10, 2014Raul Monsalve0
532014/11/11Finite Length Horizontal Dipole over a Ground Plane: Simulated Beam vs Analytical Beam StudyTom Mozdzen0
542014/11/11Guidelines to Set CST Solver AccuracyTom Mozdzen0
552014/12/08Testing the Temperature Controller on 2014/12/08Raul Monsalve0
562014/12/08EDGES - Temperature Control CircuitRaul Monsalve0
572014/12/11Testing the Temperature Controller on 2014/12/11Raul Monsalve0
582015/02/12Progress Toward a Full Uncertainty Propagation Machinery for EDGESRaul Monsalve0
592015/02/19Progress Toward a Full Uncertainty Propagation Machinery for EDGES: IIRaul Monsalve0
602015/03/05Summary of Antenna S11 Measurements at MRO Starting on 2015/02/27Raul Monsalve0
612015/03/11Highband Blade Antenna CST Simulation Matrix 3x3x3x2 S11 ResultsTom Mozdzen0
622015/03/18Highband Blade Antenna Update:Beam Patterns, Derivatives, and RMS Error Calculations IncludedTom Mozdzen0
632015/05/13Antenna S11 Measurements at MRO, April/May 2015Raul Monsalve0
642015/06/04Comparison of Alternatives for Calibration of the High-Band Receiver 2015 at 25oCRaul Monsalve0
652015/06/11Reflection Coefficient Measurements of the EDGES High-Band Fourpoint Antenna Starting on 2015/06/06Raul Monsalve0
662015/08/04Reflection Coefficient Measurements of the EDGES High-Band BLADE Antenna Starting on 2015/07/31Raul Monsalve0
672015/09/22Reflection Coefficient Measurements of the EDGES High-Band BLADE Antenna Starting on 2015/09/19Raul Monsalve0
682015/09/25Stability of the Antenna Reflection Coefficient Measurements at the MRORaul Monsalve0
692015/09/26Pictures of the Low-band Receiver AssemblyRaul Monsalve0
702015/12/10Reflection Coefficient Measurements of the EDGES Low-Band BLADE Antenna Starting on 2015/12/08Raul Monsalve0
712016/03/16Estimates for the Sky Polarization Intensity at ~150 MHz averaged over Wide Solid AnglesRaul Monsalve0
722016/03/16Spectral Index Estimation Using Fourpoint Antenna DataTom Mozdzen0
732016/03/16Spectral Index Estimation Using Blade Highband and Lowband Antenna DataTom Mozdzen0
742016/07/20Estimating the Accuracy of the Antenna S11 Measurements at the MRORaul Monsalve0
752016/04/20Spectral Index Comparisons Between GSM and EDGES High-Band MeasurementsRaul Monsalve0
762016/09/02Measurements of Low- and High-band Antenna S11 at the MRO on August 30-31, 2016Raul Monsalve0
772016/11/17EDGES High-Band Average Spectrum (ongoing work)Raul Monsalve0
782016/11/23Preliminary Rejection of Global 21-cm Models with EDGES High-Band (ongoing work)Raul Monsalve0
792016/12/13Preliminary Rejection of Gaussian Models for the Global 21-cm with EDGES High-Band (ongoing workRaul Monsalve0
802017/01/31Rejection of Tanh Models for the Global 21-cm Signal from Simulated DataRaul Monsalve0
812017/01/31Comparison of beam models from all solvers for EDGES HighbandNivedita Mahesh0
822017/02/01Rejection of Tanh Models for the Global 21-cm Signal from Simulated Data: PART2Raul Monsalve0
832017/02/07Rejection of Tanh Models for the Global 21-cm Signal from Simulated Data: PART3 Sliding Window ApproachRaul Monsalve0
842017/02/16Rejection of Tanh Models for the Global 21-cm Signal: PART 4, chi^2 Sliding Window Approach (ongoing work)Raul Monsalve0
852017/02/27Estimation of the Reflection Magnitude Accuracy with the Agilent E5061A VNA at −30 dBmRaul Monsalve, Nivedita Mahesh, Thomas Mozdzen0
862017/03/05Initial Calibration Results for Second EDGES Low-Band ReceiverRaul Monsalve, Nivedita Mahesh, Thomas Mozdzen0
872017/03/05Estimation of the Reflection Magnitude Accuracy with the Agilent E5061A VNA: Part 2Raul Monsalve, Nivedita Mahesh, Thomas Mozdzen0
882017/04/03Re-calibration of the EDGES HighBand Receiver at 25C (Jan 2017)Tom Mozdzen, Nivedita Mahesh0
892017/04/19Lowband-2 Calibration Summary 2016Tom Mozdzen, Raul Monsalve, Nivedita Mahesh0
902017/05/11Progress in the Rejection of Physical Global 21 cm ModelsRaul Monsalve0
912017/05/27S-parameters of the Front-end Network in the Low-Band 1 ReceiverRaul Monsalve0
922017/05/29Nominal Calibration Data and Results for the Low Band 1 and 2 Receivers at 25degCRaul Monsalve0
932017/06/1421-cm Parameter Estimation using Markov Chain Monte CarloRaul Monsalve0
942017/06/15Summary of Low-Band ResidualsRaul Monsalve0
952017/04/03Investigation of changes in receiver S11 with back-end cable lengthNivedita Mahesh, Tom Mozdzen0
962017/06/24Lowband 1 recalibrationTom Mozdzen, Nivedita Mahesh0
972017/07/03Measurements of thermal-dependence of 50-Ohm terminatorsLeroy Johnson, Hamdi Mani, Judd Bowman0
982017/07/16Obtaining a Cold IGM through Modification of the Residual Ionization Fraction Following RecombinationJudd Bowman0
992017/07/27New Test Calibration of a Subset of Low-Band 1 DataRaul Monsalve0
1002017/08/14Cross-check between Calibrations of Two Benchtop Keysight/Agilent VNAsRaul Monsalve, Thomas Mozdzen, Leroy Johnson0
1012017/08/01Verification of 2015 and 2017 Parameters of the Low-Band 1 Front-End NetworkRaul Monsalve, Thomas Mozdzen, Leroy Johnson0
1022017/08/16Comparison of Methods for Reflection Calibration at the Receiver InputRaul Monsalve0
1032017/08/16Reflection Coefficient of Internal Calibration StandardsRaul Monsalve0
1042017/08/16Airline Measurements at the Input of the Low-Band 1 ReceiverRaul Monsalve0
1052017/08/24Summary of Data Analysis: Low-Band 1, Original Ground PlaneRaul Monsalve0
1062017/08/31Summary of Data Analysis: Low-Band 1, Extended Ground PlaneRaul Monsalve0
1072017/08/31Summary of Data Analysis: Low-Band 2, North-South AntennaRaul Monsalve0
1082017/08/31Summary of Data Analysis: Low-Band 2, East-West Antenna, With Balun ShieldRaul Monsalve0
1092017/08/31Summary of Data Analysis: Low-Band 2, East-West Antenna, With NO Balun ShieldRaul Monsalve0
1102017/09/24Fit Configurations for EoR Constraints in Monsalve et al. (2017)Raul Monsalve0
1112017/09/25Revisiting the Signature Extraction from Low-Band 1 Data using MCMCRaul Monsalve0
1122017/09/27Constraining Emission Feature in the Range 85-115 MHz with MCMCRaul Monsalve0
1132018/05/23Receiver Calibration Procedure DocumentTom Mozdzen0
1142018/01/24Constraints on Physical Parameters of 21-cm Models from Cohen/Fialkov/BarkanaRaul Monsalve0
1152018/01/26Constraints on Physical Parameters of 21-cm Models from Cohen/Fialkov/Barkana: Part 2Raul Monsalve0
1162018/04/12First Tests of Absorption Feature Below 90 MHz in EDGES High-Band Data with Blade AntennaRaul Monsalve0
1172018/04/17FEKO & HFSS beam comparisonNivedita Mahesh0
1182018/04/18FEKO & HFSS beam comparison with actual dataNivedita Mahesh0
1192018/04/24Receiver03-Ripple ProblemNivedita Mahesh, Leroy Johnson0
1202018/05/02Alan's Noise source & Receiver01Nivedita Mahesh, Leroy Johnson0
1212018/06/27FASTSPEC spectrometer code to replace PXSPECJudd Bowman0
1222018/07/25Foreground model selection for signal parameter estimationJudd Bowman0
1232018/08/02Open-switch verification test with Low-2Judd Bowman0
1242018/08/29Simple Parameter Estimation with PolyChord and GetDistRaul Monsalve0
1252018/10/24Receiver 03 - Complete S-parameter analysisNivedita Mahesh, Leroy Johnson0
1262018/10/24Receiver 02 - Complete S-parameter analysisNivedita Mahesh, Leroy Johnson0
1272018/10/24Receiver 01 - Re-calibration @ 25 degC in Jan 2018Nivedita Mahesh, Tom Mozdzen, Leroy Johnson0
1282018/10/29Receiver 02 - Re-calibration @ 25 degC in Sept 2018Nivedita Mahesh, Leroy Johnson0
1292018/11/01ANS#2 on Receiver 02 - Lab and Field dataNivedita Mahesh, Leroy Johnson0
1302019/02/14Receiver03 calibration 2018_08 vs 2017Nivedita Mahesh, Leroy Johnson0
1312018/02/14Receiver03 Re-calibration (with Bias-T replacement)Nivedita Mahesh, Leroy Johnson0
1322019/02/27VNA Comparison Copper Mountain R60 (Demo) and Agilent E5061ALeroy Johnson, Raul Monsalve0
1332019/03/28Mid Band data; Days -147 & 148Nivedita Mahesh0
1342019/03/28VNA Comparison Tektronix TTR506A (TEMPORARILY IN LAB DEMO) and Agilent E5061ALeroy Johnson0
1352019/05/09Receiver 01 Re-calibration - Preliminary analysisNivedita Mahesh0
1362019/05/09Receiver01 Recalibration - 2019_05Nivedita Mahesh, Leroy Johnson0
1372019/03/28VNA Comparison Copper Mountain TR1300/1 (TEMPORARILY IN LAB DEMO) and Agilent E5061ALeroy Johnson, Raul Monsalve0
1382019/05/20VNA Comparison Agilent FieldFox N9923A (TEMPORARILY IN LAB DEMO) and Agilent E5061ALeroy Johnson0
1392019/05/20VNA Comparison Pico Technology VNA106 (TEMPORARILY IN LAB DEMO) and Agilent E5061ALeroy Johnson0
1402019/06/05Ant Sim Spectra collected with Receiver-02Nivedita Mahesh0
1412019/06/05ASU Lab (L1-83) RFINivedita Mahesh, Leroy Johnson, David Lewis0
1422019/06/05Fitting Functions - For Beam paperNivedita Mahesh0
1432019/06/13Evaluation of the Keysight P9370A USB VNARaul Monsalve0
1442019/07/08Receiver-01 recalibration - preliminary resultsLeroy Johnson, Nivedita Mahesh0
1452019/08/15Mid-Band 'Metadata': GHA, Sun Elevation, Temperature, and HumidityRaul Monsalve0
1462019/08/15Mid-Band Spectral ResidualsRaul Monsalve0
1472019/08/15Bayesian Framework for Modeling UncertaintySteven Murray0
1482019/08/30Mid-Band Calibration ComparisonRaul Monsalve0
1492019/09/18Adding the absorption feature to the simulated spectraNivedita Mahesh0
1502019/09/25Total gain of the EDGES antenna above the horizonNivedita Mahesh0
1512019/10/16Comparing Antenna Simulations from FEKO, WIPL-D, and HFSS-IERaul Monsalve0
1522019/10/16LST-Binned Low-band Data analysisNivedita Mahesh, Steven Murray0
1532019/10/16SARAS Low-Band SimulationNivedita Mahesh0
1542019/10/25Antenna Simulations with WIPL-D Accounting for SoilRaul Monsalve0
1552019/11/08WIPL-D Simulations of the EDGES Mid- and Low-Band AntennasRaul Monsalve0
1562019/11/21Simulations of Out of band Noise sourceNivedita Mahesh, Titu Samson0
1572019/11/21Complete simulations of EDGES antenna with shield, top cap and balun using FEKONivedita Mahesh0
1582019/11/23Antenna Temperature and Beam Chromaticity CorrectionRaul Monsalve0
1592019/12/04Investigating different ground planes for the EDGES blade antennaNivedita Mahesh0
1602019/12/19Receiver 01 re-calibration done in November 2019Leroy Johnson, Titu Samson, Nivedita Mahesh0
1612020/01/08Planning for MRO site trip in February 2020Judd Bowman, Titu Samson, Nivedita Mahesh0
1622020/01/10Ground plane for Edges-3 and Inner base plate designTitu Samson0
1632020/01/14Receiver02 Re-calibration at 25degC done in December 2019Leroy Johnson, Titu Samson, Nivedita Mahesh0
1642020/01/15Diffuse Foreground Parameters from Mid-Band DataRaul Monsalve0
1652020/01/28Fisher Matrix Analysis of Physical Foreground Model for EDGESRaul Monsalve0
1662020/02/05Fitting Physical Foreground Model and Flattened Gaussian to Simulated Spectra with PolyChordRaul Monsalve0
1672020/02/05Fitting Physical Foreground Model to Mid-Band Data with PolyChordRaul Monsalve0
1682020/02/12Calibration Run of Receiver01 2020-01Steven Murray0
1692020/02/12Cross Check Rcv01 Re-calibration 2019_01Nivedita Mahesh0
1702020/02/21Welding Ground Plane at MROCassie Bowman0
1712020/03/03Lowband-1 data analysis in 5 hour GHA binsNivedita Mahesh, Steven Murray0
1722020/03/04Midband spectral indexNivedita Mahesh0
1732020/03/17S11 measurements of the standard dipoleNivedita Mahesh, Titu Samson0
1742020/03/18Low-Band 2 Antenna S11 in February-March 2020Raul Monsalve0
1752020/04/12Preliminary Analysis of Mid-Band Data from Feb to Apr 2020Raul Monsalve0
1762020/04/14Preliminary Analysis of Mid-Band Data from Feb to Apr 2020: Part 2Raul Monsalve0
1772020/04/18Preliminary Fits to Mid-Band Spectrum from GHA=15-18 hrsRaul Monsalve0
1782020/05/06Residuals of Low1, Low2, Low3, and Mid-Band Antenna S11Raul Monsalve0
1792020/05/11Exploring RFI extraction with edges_cal.xrfiSteven Murray0
1802020/05/11Quick Demonstration of the new edges-analysis pipelineSteven Murray0
1812020/05/12Testing for I/Q crosstalk in the lab VNANivedita Mahesh0
1822020/05/12Wiring diagram and photos of Edge-hutTitu Samson0
1832020/10/09Averaging with WeightsSteven Murray0
1842020/12/06Calculating total gain of the antenna above the horizonNivedita Mahesh0
1852020/12/06Features in the Solid Angle of Some EDGES Antenna Beams from FEKORaul Monsalve0
1862020/12/06Revisiting the Sky Observations from Nevada in 2014Raul Monsalve0
1872020/12/09Computation of Tropospheric/Ionospheric Refraction in Single-Antenna MeasurementsRaul Monsalve0
1882021/02/02Optimal GHA Bin SizeDavid Lewis, Steven Murray0
1892021/04/28Alternatives for Beam CorrectionRaul Monsalve0
1902021/06/23LST Analysis of the Beam coverage on the SkyNivedita Mahesh2
1912021/06/21EDGES-low GHA dependent data: cross-checks and null testsPeter Sims0
1922021/08/02Spectral Structure in Low- and Mid-Band Simulated ObservtionsRaul Monsalve0
1932021/08/02Fits of Absorption Feature to Mid-Band 2018 DataRaul Monsalve0
1942021/08/30Simultaneous Calibration and Signal Fits for Different Numbers of Cal TermsSteven Murray0
1952022/01/07Effects of Internal Switch measurements on the Antenna S11 modeling.Nivedita Mahesh, Steven Murray0
1962022/01/10Quantifying correlations between frequency binsSteven Murray0
1972022/01/10Effect of ambient temperature variations on the Long CableSteven Murray0
1982022/03/30Files and resources to generate the figure 1 of Bowman et.al.(2018)Steven Murray, Nivedita Mahesh, Alan Rogers0
1992022/04/11getting_2015_calibration_AlanNewNivedita Mahesh0
2002024/01/31Bench tests for EDGES-3 Ground Plane ResonanceAkshatha Vydula2
2012024/02/26EDGES-3 Ground Plane Resonance testing at the SiteAkshatha Vydula, Nivedita Mahesh2
2022024/03/29EDGES Site Trip Summary Feb 2024Nivedita Mahesh, Akshatha Vydula2
2032024/05/03 Updates on edges software suite for EDGES-3 data analysisAkshatha Vydula, Steven Murray2
2042024/04/18Reflections in long cable calibration sourceAkshatha Vydula, Steven Murray2
2052024/08/16Matching EDGES-3 calibration with C-code using AlanmodeSteven Murray1
2062024/08/16Validation of edges-cal using simulated sky signalAkshatha Vydula1
2072024/07/19Concrete bricks on the EDGES ground planeNivedita Mahesh1
2082024/08/19Testing edges-analysis with the 2018 datasetNivedita Mahesh,steven Murray0