RFI Memos Series

Memo Submission

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Memo Number Cross-Posted Memo Title Original Memo Date
1 The Level of Noise and Interference Between 216 and 420 MHz,and the Best Frequencies for Lunar Occulation Work MISC UNUM 0663 04/01/63
2 A Proposed Interference Measurement System MISC UNUM 0167 01/25/67
3 Interference Between Telescopes MISC UNUM 0569 05/19/69
4 Radio Frequency Interference Suppression on the 1972 Chevrolet Vega MISC UNUM 0872 08/01/72
5 The Effect of CW Interference on the Three Element Interferometer VLAS 104 02/01/73
6 Design of the Electronic System To Minimize the Effects of Interference VLAE 111 03/01/73
7 The Effect of Radio Interference on the VLA VLAE 110 03/28/73
8 RFI Surveillance Computer Interface EDIR 133 10/01/73
9 Front End To LO/IF Interference Tests VLAE 130 03/01/75
10 Interference Potential for Radio Astronomy Observations at Green Bank, West Virginia EDIR 159 05/01/75
11 Results of Interference Survey 25M 054 08/23/76
12 Study of Self-Generated Interference in the VLA at L-Band VLAE 176 08/01/78
13 Harmful Interference Levels for the VLA VLAE 183 07/01/79
14 The VLA Interference Monitoring System VLAE 195 08/01/80
15 Draft Specifications for a Proposed RFI-Cancelling Pulsar Spectrometer SPM 001 09/10/81
16 Interference Characteristics SPM 008 01/15/82
17 Radio Interference at the VLA Site VLAE 205 03/01/82
18 Intermodulation RFI in Receiver Systems EDTN 108 03/31/82
19 400 MHz Interference Survey SPM 016 12/21/82
20 Radio Interference in the 20 cm Band VLAT 139 01/05/83
21 RFI and Meteorological Environments at Haleakala Observatory, Maui,Hawaii VLBA 209 04/13/83
22 Measurement of Potential Interference From the IONDS Transmissions of the Navstar Series of Satellites VLAE 210 09/01/83
23 Site RFI Potential - Possible On-Site Spectrum Measurements by the U.S. Department of Commerce NTIA/ITS RSMS Van VLBA 301 12/09/83
24 NTIA RFI Evaluation for VLBA Sites VLBACC 19 12/13/83
25 Radio Interference from High Voltage Power Lines VLAE 211 07/01/84
26 RFI at the Haystack Site VLBA 383 08/23/84
27 RFI Survey for the VLBA Los Alamos, NM Site (TA 33) August 20 to September 28,1984 VLBA 401 10/01/84
28 RFI Survey for the VLBA Pie Town, NM Site June 19 to October 19,1984 VLBA 407 11/01/84
29 RFI Survey for the VLBA Kitt Peak, AZ Site VLBA 423 12/01/84
30 50 cm Lambda; RFI in Massachusetts VLBA 415 12/14/84
31 RFI Survey for the VLBA Three Points, AZ Site (Robles Junction) VLBA 433 01/01/85
32 Dynamic Range and Interference Thresholds in the Front-End and IF Units VLBAE 39 03/01/85
33 RFI Survey for the VLBA Ft. Davis, TX Site VLBA 446 03/01/85
34 RFI Survey for the VLBA North Liberty Radio Observatory Site VLBA 455 04/01/85
35 RFI Survey for the VLBA North Central Washington Site VLBA 494 07/01/85
36 Interference To Radio Astronomy from GLONASS Transmissions in the Frequency Band 1600-1615 MHz VLAT 146 08/01/85
37 RFI Survey for the University of Arizona Mt. Graham Radio Observatory Site VLAE 214 08/01/85
38 RFI Survey for the VLBA Owens Valley Radio Observatory VLBA 495 08/01/85
39 Interference from Current Loops VLBAE 54 10/04/85
40 RFI Survey for the VLBA Locations on the Island of Hawaii VLBA 519 11/01/85
41 Susceptibility of VLBA Data Acquisition System To Interference in the I.F. (500-1000 MHz) Band VLBAD 058 11/18/85
42 RFI Survey for the VLBA West Indies Laboratory VLBA 563 06/01/86
43 RFI Interference Survey for the VLBA Northeast Site VLBA 609 10/01/87
44 RFI Interference Survey for the VLBA Northeast Site VLBA 609 10/01/87
45 Green Bank RFI Environment VLBA 612 11/17/87
46 An Overview of the RFI Monitoring System for the VLBA Project VLBA 643 04/01/89
47 Measurements of RFI from the SOWRBALL Aerostat VLBA 654 12/16/89
48 Radio-Frequency Interference and the MMA ALMA 76 01/22/92
49 Suppressing Interference at 1351 and 1361 MHz or How To get Rid of Crane the Forest Service Birdies VLAT 162 05/01/92
50 RFI Tests on PowerTec Brushless Motor and Controller GBT 076 05/01/92
51 RFI Tests on Magnetostrictive Position Sensors GBT 077 05/05/92
52 RFI Testing of Power Drive Unit and Six Motors GBT 086 10/01/92
53 RFI Emissions from Vac Ion Pumps VLAI 01 11/01/92
54 FI Emissions from Vac Ion Pumps VLAT 187 11/01/92
55 RFI at Saint Croix due To FAA RADAR at L-Band VLAI 02 11/11/92
56 RFI at Saint Croix due To FAA RADAR at L-Band VLBAE 135 11/11/92
57 Active Surface Actuator RFI Problems GBT 095 12/18/92
58 Information and Services Available from the Interference Office, National Radio Astronomy Observatory, Green Bank, West Virginia GBIO 01 11/15/93
59 Green Bank RFI Monitoring Station GBIO 03 03/07/94
60 Interference at 1330 MHz VLAI 11 04/05/94
61 Interference at 1330 MHz VLAT 185 04/05/94
62 A Proposal To Control Local Interference at the VLA VLAI 12 04/25/94
63 A Proposal To Control Local Interference at the VLA VLAT 188 04/25/94
64 Problems with Internet at Kitt Peak VLBA from RFI VLBAT 48 06/20/94
65 Evaluation of Electrical Device Interference Portential To Radio Astronomy Observations EDIR 296 08/01/94
66 Strong Interference at the VLA,1994 VLAI 05 02/01/95
67 Index of Interference Memos VLAI 06 02/01/95
68 The VLA IF Interference Monitor VLAI 08 06/01/95
69 Digital Spectrometer / Autocorrelator for Monitoring RFI VLAI 07 06/01/95
70 System Generated RFI in the VLA at L-Band VLAT 194 07/21/95
71 Presentation of VLA Interference Information on the Web VLAI 09 09/01/95
72 System Generated RFI at high frequency Bands and Spurious Signals Due To Intermodulations VLAT 197 10/31/95
73 Reduction of 1400 MHz RFI in the VLA VLAT 200 10/27/96
74 An Adaptive Interference Canceling Receiver for Radio Astronomy - Theory EDIR 305 11/01/96
75 Performance Characterization of the 1-18 GHz Ailtech-Stoddart NM67-CC17 Reciever System Used as Part of the Continous RFI Environmental Monitoring System (EMS) at the VLA VLAI 15 10/02/00
76 Simulation Tests To Quantify the Spectral Dynamic Range and Narrowband Interference Robustness of the WIDAR Correlator for the EVLA EVLAM 19 11/01/00
77 Quietzone Interference Analysis Program CDIR 14 11/15/00
78 Radiated RFI Emissions from the ALMA Test Correlator and 1.6 GHz Digitizers and Comparison To Harmful Levels To VLA Observations VLAI 14 11/15/00
79 Local RFI Mitigation Interference Protection Group GBTM 3 04/01/01
80 RFI Excision Research (MRI) GBTM 26 04/01/01
81 Local RFI Mitigation Interference Protection Group GBTM 3 04/01/01
82 Radio Frequency Interference Satellite Tracking System (STS) VLAI 18 05/05/01
83 Radio Frequency Interference Environmental Monitoring System (EMS) VLAI 19 05/05/01
84 Radiated RFI Emission Tests of the Motorola 162.025 MHz Radios Currently Used at the VLA and of the Kenwood 410.55/419.55 MHz Radios Proposed as a Replacement VLAI 22 06/18/01
85 KP-VLBA RFI at 610.75 MHz in Radio Astronomy Primary Allocated Band VLAI 20 07/26/01
86 EVLA Radio Frequency Interference Survey from 1-8 GHz,Analysis of EMS System Noise Figure and VLA L-Band Feed Horns VLAI 23 12/28/01
87 RFI survey at S-Band (1.7-2.6 GHz) GBTCM 019 02/25/02
88 Tests of DW8 RFI Monitor VLAI 24 07/01/02
89 RFI Emission Goals for EVLA Electronics EVLAM 46 10/15/02
90 Attenuation of Radio Frequency Interference by Interferometric Fringe Rotation EVLAM 49 11/15/02
91 Cancellation of TV Interference EDTN 193 12/27/02
92 RFI Survey At the ALMA Site At Chajnantor memo470 07/15/03
93 Removing RFI Through Astronomical Image Processing EVLAM 61 07/21/03
94 Signal Analysis and Blanking Experiments on DME Interference EDIR 313 04/07/04
95 EVLA Chamber Characterization Confirms PCB RFI Emissions Levels and Module Shielding Goals EVLAM 78 06/10/04
96 RFI excision in synthesis imaging without a reference signal EVLAM 86 12/08/04
97 Functional Description ofPIC16F877A Functions and Interfaces To GBT RFI Monitor Station EDTN 208 04/26/05
98 RFI from VoIP phones EVLAM 99 01/01/06
99 RFI Emission Goals on Internally-Coupled Signals EVLAM 104 08/25/06
100 RFI Emission Limits For Equipment at the VLA Site EVLAM 106 09/08/06
101 VLA Site Generated RFI Control Plan VLAI 35 12/11/06
102 Notes on RFI Emissions Levels VLAI 34 12/21/06
103 The Effect of Amplifier Compression by Narrowband RFI on Radio Interferometer Imaging EVLAM 110 04/25/07
104 Sensitivity Comparison of RFI MonitorStation and GBT L-Band Receiver EDTN 209 08/24/07
105 RFI Mitigation in AIPS; The New Task UVRFI AIPSM 116 06/01/10
106 RFI Mitigation in AIPS. The New Task UVRFI EVLAM 146 06/02/10
107 The Effects of Automated RFI Mitigation on Source Intensity EVLAM 161 05/08/12
108 Clock Signal Harmonics in EVLA Baselines EVLAM 183 09/16/14
109 The effect of RFI on 3-bit data at C-band EVLAM 187 10/09/14
110 Interference Potential of the 140-ft Telescope's 7.2075 GHz RadioAstron Transmitter GBT 291 08/18/15
111 EVLA Ka-band Receiver Down Converter Module Harmonics: The “Mega-Birdie” at 29440 MHz EVLAM 194 02/05/16
112 Subarray Processing for Projection-Based RFI Mitigation in Radio Astronomical Interferometers ngVLA 38 03/12/18
113 ngVLA Radio Frequency Interference Forecast ngVLA 48 07/01/18
114 S-band Radio Frequency Interference from Geostationary Satellites EVLAM 206 07/20/18
115 Radio Frequency Interference Cancellation, Appraisal,Detection,and Correction ngVLA 56 02/01/19
116 RFI Mitigation for the ngVLA: A Cost-Benefit Analysis ngVLA 70 12/10/19
117 RFI Mitigation in the ngVLA System Architecture ngVLA 71 02/06/20
118 Plan for VLBA RFI monitoring VLBAO 58 03/08/21
119 Software Requirements for RFI Management ngVLAC 03 08/04/21
120 Coordinated Starlink User Terminal Testing Near the VLA EVLA 222 04/15/23
121 SpaceX-VLA Alamo Pilot Testing EVLA 223 04/15/23
122 Updated RFI Impact Estimates & Influence on the System Design ngVLA 109 04/24/23
123 The Potential Effect on GBT Science of WiFi at Green Bank Elementary Middle School GBT 309 09/27/23
124 Results from Green Bank Observatory’s Chamber Day 28 September, 2023 GBT 310 10/11/23

Memo Number Title Authors Date
151 RFI Memo Series C. De Pree, S. Wasik 06/26/23
152 ALMA Spectrum and Radio Frequency Interference G. Siringo, S. Dougherty 07/01/23
153 Detrimental Emission Levels for Orbital RFI R. Selina, C. De Pree 10/04/23
154 Coordinated GBT-Starlink Tests (April-July 2023) C. De Pree, et al. 10/06/23
155 On S-band Observations with the VLBA E. W. Greisen 09/27/23




Modified on Monday, 16-Oct-2023 14:52:10 EDT by Library Staff