Block adaptive quantization of Magellan SAR data

Details Block adaptive quantization of Magellan SAR data Block adaptive quantization of Magellan SAR data

Jul 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989itgrs..27..375k&link_type=abstract

IEEE Transactions on Geoscience and Remote Sensing (ISSN 0196-2892), vol. 27, July 1989, p. 375-383.

Computer Science

18

Data Compression, Data Simulation, Magellan Project (Nasa), Space Based Radar, Synthetic Aperture Radar, Analog To Digital Converters, Radar Echoes, Signal To Noise Ratios

Scientific paper

A report is presented on a data compression scheme that will be used to reduce the SAR data rate on the NASA Magellan mission to Venus. The spacecraft has only one scientific instrument, a radar system for imaging the surface, for altimetric profiling of the planet topography, and for measuring radiation from the planet surface. A straightforward implementation of the scientific requirements of the mission results in a data rate higher than can be accommodated by the available system bandwidth. A data-rate-reduction scheme which includes operation of the radar in burst mode and block-adaptive quantization of the SAR data is selected to satisfy the scientific requirements. Descriptions of the quantization scheme and its hardware implementation are given. Burst-mode SAR operation is also briefly discussed.

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