Orbiting VLBI Memo SeriesThe Orbiting VLBI memo series describing the design and construction of the tracking station is summarized here. Many memos are available on-line.
NO. DATE STATUS CODE AUTHOR(S)/TITLE 1 5/27/90 C L. D'Addario OVLBI Earth Station Memo Series 2 5/27/90 O L. D'Addario Radioastron Communication Link Parameters 3 8/1/90 C L. D'Addario OVLBI Timekeeping with the VLBA Formatter 4 9/7/90 C, A5 L. D'Addario Requirements for Feeds and Optics on the 45-foot Antenna in Green Bank 5 11/27/90 C, A4 S. Srikanth A Possible Optics Scheme for the 45-Foot Antenna in Green Bank 6 10/19/90 O, S15 R. Linfield Orbit Determination Requirements for VSOP and Radioastron 7 8/31/90 C R. Linfield Several Potential Error Sources for Round Trip Doppler Measurements ... 8 1/11/91 C, A13 L. D'Addario Software Requirements for the Green Bank OVLBI Earth Station 9 1/10/91 C R. Linfield and J. Springett The Need for Doppler Compensation in the Phase Uplink for VSOP and ... 10 4/9/91 C L. D'Addario Recovery from Communication Dropouts 11 4/24/91 O, A3, A10 L. D'Addario Two-Way Timing Measurement with Uplink Compensation 12 6/4/91 C L. D'Addario Green Bank Earth Station: System Design Principles 13 6/11/91 C, A8 D. Varney and L. D'Addario Earth Station Control Computer - Operating System Selection 14 6/13/91 C L. D'Addario Performance Measurements of the Green Bank 45-Foot (13.7-M) Antenna 15 6/6/91 C R. Linfield Orbit Determination Requirements for VSOP and Radioastron 16 7/19/91 C R. Linfield Data Loss as a Function of Orbit Prediction Accuracy for VSOP 17 10/8/91 C B. Shillue Low-Noise Amplifier Gain Compression and Intermodulation Distortion 18 11/20/91 C B. Shillue A Frequency-Selective Surface for the OVLBI Earth Station: Initial 19 7/10/91 C L. D'Addario Proposed Earth Station to Correlator Interface for Timing Corrections 20 12/6/91 C L. D'Addario Two-Way Timing Residuals: Data Characteristics and Methods of Handling 21 Dec. 91 C A. Novikov Radioastron Downlink Decoder Specification for USSR Earth Stations 22 12/12/91 C L. D'Addario Notes on Phase Downlink Signal Processing 23 12/30/91 C R. Hudson and D. A. Czenkusch Gravitational Effects on OVLBI Timing Link 24 Feb. '92 C A. Novikov and V. Promislov IBM PC VLBA Recording Terminal Control Software Working Under MS-DOS 25 3/11/92 C L. D'Addario Real-Time Processing of Downlink Phase Measurements 26 4/24/92 C B. Shillue Measurement Results of Sandwich FSS 27 4/27/92 C B. Shillue Feed and Optics Design for the Green Bank OVLBI Earth Station 28 5/14/92 C L. D'Addario and D. Varney Decision to Change Operating System of the Control Computer 29 May 1992 C V. Altunin et al. Comparison of RF Methods for Testing of a Space Radio Telescope ... 30 7/25/92 C L. D'Addario Polarizations of VSOP and RADIOASTRON Radio Links 31 7/24/92 C T. Murphy Pointing Accuracy of the 45-Foot Antennna 33 8/31/92 C L. D'Addario Software Code Control Procedures for Green Bank OVLBI Earth Station 34 8/30/92 C R. Hudson Recorder Acceptance Tests Report 35 7/20/92 C R. Hudson Decoder Preliminary Design 36 9/14/92 C L. D'Addario Synchronization of Slow & Fast Reference Signals After Long Transmission 37 1/6/93 C L. D'Addario Notes on Internal Software Design Review Meeting of 12/18/92 38 2/4/93 O, A64 L. D'Addario Post-Pass Processing of Two-Way Timing Measurements 39 4/12/93 C L. D'Addario Notes on the Hardware Design Review of March 1993 40 5/10/93 C B. Shillue Tests of Digital Attenuators 41 5/18/93 C B. Shillue Measurement Results: Corrugated Horns and FSS 42 6/2/93 C L. D'Addario Software Design Review of May 1993 and Documentation Status 43 7/26/93 C L. D'Addario Software Standards for the GBES Project 44 9/13/93 C G. Langston and L. D'Addario Global Schedule File Design Document 45 9/15/94 C G. Langston Astronomical Surveys with the GBES 46 6/01/94 C L. D'Addario Specification for a Program to Generate Simulation of Downlink Headers 47 7/12/94 C L. D'Addario System Phase Noise Requirements 48 7/02/94 C L. D'Addario Reference Transmission System: Design and Test Results 49 8/29/94 C L. D'Addario OVLBI Decoder Test Fixture 50 10/09/94 C L. D'Addario VSOP Compatibility Tests at Green Bank, September 1994 51 12/07/94 C L. D'Addario Hardware Documentation Standards 52 12/12/94 C G. Langston Plan for Modifications to 45' Access Hatch 53 12/12/94 C G. Langston Modifications to 45' Access Hatch 54 01/24/95 C G. Langston GBES Antenna Efficiency Measurements of April 1994 55 03/22/95 C L. D'Addario Correlating Orbiting Radio Telescope Data with Time Corrections 56 04/03/95 C L. D'Addario Reduction of Phase Residuals to Time Units 57 01/30/95 O G. Langston GBES Antenna Pointing Offsets for 1994 58 11/28/95 C A. Minter, L. D'Addrio, G. Langston GBES Observations of Surfsat 59 03/11/96 C L. D'Addario Pulse Calibration for Orbiting VLBI 60 02/18/96 C L. D'Addario Tone Extraction Using Fanned-Out Data 61 04/04/96 C L. D'Addario VSOP Compatibility Tests at Green Bank, March 96 62 05/14/96 C A. Minter Ionospheric and Tropospheric Corrections for the Deltat T File 63 05/25/96 C A. Minter Estimating the Tropospheric Correction for Delta T Data 64 07/08/96 C L. D'Addario Post-Pass Processing of Two-Way Timing Measurements 65 08/10/96 C L. D'Addario Effects of Earth Station Clock Error on Correlator Time Corrections 66 05/25/96 C A. Minter Conversion of Two-Way Timing Data to Doppler Data 67 12/23/96 C L. D'Addario Compatibility Tests between JPL Data Generator and Usuda Tracking Station 68 01/12/97 C L. D'Addario Comparison of Decoder Designs -- VSOP Mode 69 01/12/97 C L. D'Addario Doppler File Time Tag Offset 70 03/17/97 C G. Langston NRAO Orbiting VLBI Earth Station Coordinates 71 04/24/97 C L. D'Addario Details of Post Pass Processing of the Time Correction Data 72 04/01/98 C A. Minter GBES Tracking Station Summary Report 73 07/02/98 C L. D'Addario RadioAstron Link Budgets for High Orbit 74 02/24/99 C G. Langston Usuda Time Correction File Tests: Phase detection delays (TeX) 75 03/31/99 C G. Langston Usuda - HALCA Range Prediction: The orbitUsuda program (TeX) 76 TBD U G. Langston Topic: Usuda Time Corrections File 77 11/09/99 C A. Minter, D. Pedtke and A. Wester RadioAstron Compatibility Tests At Green Bank, May 1999 (html) (Postscript) (pdf) 78 12/07/99 C A. Minter Installation of the VSOP Tape Recorder in Green Bank. 79 12/09/99 C A. Minter Remove MCB Operation of the VLBA Tape Drives. 80 11/15/00 C G. Behrens, G. Anderson, G. Watts and G. Langston S/X Feed Horn Properties at 2025 to 2120 MHz. 81 10/30/01 C G. Langston GBES Antenna Pointing Offsets for 2001.(The latest memos may not be listed above!) The OVLBI tracking station project is operated by the NRAO for NASA. email@example.com Last updated 01 Nov 14