Lossless data compression algorithm for satellite packet telemetry data

A brand-new satellite packet telemetry data compression algorithm is proposed by this paper, which utilizes the slowly-changing characteristic of satellite telemetry data. Unchanged bytes are removed from the original data and the other bytes are reorganized with position. If unchanged bytes are outnumbered by the changed ones in one packet, the whole packet data remains uncompressed. The compression algorithm is lossless. Bit error scatter is restricted within two bytes. Tests revealed that the average compression ratio of the algorithm is about 5. The algorithm can be used in satellite and spacecraft telemetry data process.