On-Board Image Compression for the RAE Lunar Mission |
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Authors: | Miller WH Lynch TJ |
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Institution: | NASA-Goddard Space Flight Center Greenbelt, Md. 20771; |
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Abstract: | The requirements, design, implementation, and flight performance of an on-board image compression system for the lunar orbiting Radio Astronomy Explorer-2 (RAE-2) spacecraft are described. The image to be compressed is a panoramic camera view of the long radio astronomy antenna booms used for gravity-gradient stabilization of the spacecraft. A compression ratio of 32 to 1 is obtained by a combination of scan line skipping and adaptive run-length coding. The compressed imagery data are convolutionally encoded for error protection. This image compression system occupies about 1000 cm2 and consumes 0.4 W. |
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