The Telecommunications and Data Acquisition Progress Report 42-82

April-June 1985

E. C. Posner
Editor


August 15, 1985

NASA Logo
National Aeronautics and
Space Administration

Jet Propulsion Laboratory
California Institute of Technology
Pasadena, California


Contents

Preface

OSTDS TASKS
DSN Advanced Systems
TRACKING AND GROUND-BASED NAVIGATION

A VLBI Survey at 2.29 GHz
D. D. Morabito, R. A. Preston, J. G. Williams, J. Faulkner, D. L. Jauncey, and G. D. Nicolson
NASA Code 310-10-60-26-00

Comparison of the Calibration of Ionospheric Delay in VLBI Data by the Methods of Dual Frequency and Faraday Rotation
J. A. Scheid
NASA Code 310-10-60-60-00

COMMUNICATIONS, SPACECRAFT-GROUND

A New 70-Meter Antenna Quadripod With Reduced RF Blockage
J. J. Cucchissi
NASA Code 310-20-65-64-00

Seismic Analysis of the Large 70-Meter Antenna, Part I: Earthquake Response Spectra Versus Full Transient Analysis
K. Kiedron and C. T. Chian
NASA Code 310-20-65-64-00

An Experimental TE12-TE11 Circular Waveguide Mode Converter
D. Hoppe
NASA Code 310-20-64-22-00

Propagation and Radiation Characteristics of a Multimode Corrugated Waveguide Feedhorn
D. Hoppe
NASA Code 310-20-64-22-00

Load-Deflection Tests and Computer Analyses of a High-Precision Adhesive-Bonded Antenna Reflector Panel
C. T. Chian and R. Levy
NASA Code 310-20-65-05-10

STATION CONTROL AND SYSTEM TECHNOLOGY

A Sequential Decoding Performance Analysis for International Comet Explorer
D. Divsalar
NASA Code 310-30-71-63-04

The VLSI Design of Error-Trellis Syndrome Decoding for Convolutional Codes
I. S. Reed, J. M. Jensen, T. K. Truong, and I. S. Hsu
NASA Code 310-30-70-84-08

High-Rate Convolutional Code Construction With the Minimum Required SNR Criterion
P. J. Lee
NASA Code 310-30-71-83-02

DSN Systems Implementation
NETWORK SUSTAINING

DSN Frequency and Timing System, MarkIV-85
B. W. Falin
NASA Code 314-40-41-81-13

DSN Operations
MISSION INTERFACE AND SUPPORT

JPL Emergency Support of TDRSS and Compatible Satellites
N. A. Fanelli
NASA Code 314-40-22-34-01

TDA PROGRAM MANAGEMENT AND ANALYSIS

Planning for VLA/DSN Arrayed Support to the Voyager at Neptune
J. W. Layland and D. W. Brown
NASA Code 314-40-31-30-03

A VLA Experiment - Planning for Voyager at Neptune
J. W. Layland, P. J. Napier, and A. R. Thompson
NASA Code 314-40-31-30-03

Periodic Binary Sequences With Very Good Autocorrelation Properties
S. Tyler and J. Loftsson
NASA Code 055-47-11-10-01

A Binary Sequence of Period 60 With Better Autocorrelation Properties Than the Barker Sequence of Period 13
J. Watkins, J. Loftsson, and S. Tyler
NASA Code 055-47-11-10-01

GCF Implementation and Operations

The GCF Mark IV Implementation and Beyond
R. A. Crowe
NASA Code 314-20-40-00-08

OSSA TASKS
Search for Extraterrestrial Intelligence

SETI Radio Spectrum Surveillance System
B. Crow, A. Lokshin, M. Marina, and L. Ching
NASA Code 199-50-62-10-04

Mobile VLBI and GPS Measurement of Vertical Crustal Motion
P. M. Kroger, J. M. Davidson, and E. C. Gardner
NASA Code 692-40-40-00-07

DISCRETIONARY FUNDED TASKS

Improved Mapping of Radio Sources From VLBI Data by Least-Squares Fit
E. R. Rodemich
NASA Code 404-00-73-02-55

Referees


The research described in this publication was carried out by the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration. Reference herein to any specific commercial product, service, process, or service by trade name, trademark, manufacturer, or otherwise, does not constitute or imply its endorsement by the United States Government or the Jet Propulsion Laboratory, California Institute of Technology.


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