Orbiting VLBI Memo Series

The Orbiting VLBI memo series describing the design and construction of the tracking station is summarized here. Many memos are available on-line.


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

75   03/31/99     C              G. Langston
Usuda - HALCA Range Prediction: The orbitUsuda program

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.

Last updated 01 Nov 14