The Telecommunications and Data Acquisition Progress Report 42-126

April-June 1996

Joseph H. Yuen
Editor-in-Chief


August 15, 1996


National Aeronautics and
Space Administration

Jet Propulsion Laboratory
California Institute of Technology
Pasadena, California


Contents

Preface

List of Changes

OSC TASKS
DSN Advanced Systems
TRACKING AND GROUND-BASED NAVIGATION

Record Atomic Frequency Standard Stability With Mercury in a Linear Ion Trap
R. L. Tjoelker, J. D. Prestage, and L. Maleki
NASA Code 314-30-11-40-02

Frequency Stability of 1 x 10-13 in a Compensated Sapphire Oscillator Operating Above 77 K
D. G. Santiago, G. J. Dick, and R. T. Wang
NASA Code 314-30-11-50-03

A Demonstration of Precise Calibration of Tropospheric Delay Fluctuations With Water Vapor Radiometers
L. P. Teitelbaum, R. P. Linfield, G. M. Resch, S. J. Keihm, and M. J. Mahoney
NASA Code 314-30-11-90-02

Estimation of Tropospheric Fluctuations Using GPS Data
C. J. Naudet
NASA Code 314-30-11-90-02

COMMUNICATIONS, SPACECRAFT-GROUND

Automated Downlink Analysis for the Deep Space Network
D. Watola and J. B. Hampshire II
NASA Code 314-30-11-70-07

End-to-End System Consideration of the Galileo Image Compression System
K.-M. Cheung, M. Belongie, and K. Tong
NASA Code 314-30-61-02-05

Eigen Theory for Optimal Signal Combining: A Unified Approach
K.-M. Cheung
NASA Code 314-30-11-20-03

The Power Spectrum of Unbalanced NRZ and Biphase Signals in the Presence of Data Asymmetry
M. K. Simon and S. Million
NASA Code 315-90-41-13-05

Serial Concatenation of Interleaved Codes: Performance Analysis, Design, and Iterative Decoding
S. Benedetto, D. Divsalar, G. Montorsi, and F. Pollara
NASA Code 315-91-20-20-53

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. ÿ