Optimizing the Galileo space communication link

Details Optimizing the Galileo space communication link Optimizing the Galileo space communication link

Feb 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994tdar.nasa..114s&link_type=abstract

In its The Telecommunications and Data Acquisition Report p 114-120 (SEE N94-29652 08-32)

Computer Science

Communication Networks, Data Compression, Data Reduction, Decoding, Downlinking, Galileo Project, Radio Communication, Reed-Solomon Codes, Space Communication, Superhigh Frequencies, Galileo Spacecraft, High Gain, Microwave Antennas, System Failures, Ultrahigh Frequencies

Scientific paper

The Galileo mission was originally designed to investigate Jupiter and its moons utilizing a high-rate, X-band (8415 MHz) communication downlink with a maximum rate of 134.4 kb/sec. However, following the failure of the high-gain antenna (HGA) to fully deploy, a completely new communication link design was established that is based on Galileo's S-band (2295 MHz), low-gain antenna (LGA). The new link relies on data compression, local and intercontinental arraying of antennas, a (14,1/4) convolutional code, a (255,M) variable-redundancy Reed-Solomon code, decoding feedback, and techniques to reprocess recorded data to greatly reduce data losses during signal acquisition. The combination of these techniques will enable return of significant science data from the mission.

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