Amv. Monteiro et al., A SMART TELEMETRY COMPRESSION SYSTEM FOR A SPACE INSTRUMENT - MARS-96ELISMA INSTRUMENT COMPLEX, Microprocessors and microsystems, 20(1), 1996, pp. 17-30
A smart telemetry compression system has been developed for the ELISMA
complex of instruments on MARS-96. Most of the data generated by the
individual instruments of the complex require compression before trans
mission back to Earth since the complex is capable of producing data a
t many times the allocated ELISMA telemetry data rate. A compression a
lgorithm was produced that could achieve a selectable compression rati
o of 5: 1, 6: 1, or 7: 1. An equivalent fuzzy logic controller sets th
e compression ratio for each data record of each individual instrument
depending on: (i) the best ratio as determined by the variability of
the data in that record; (ii) the instantaneous level of the data held
in the telemetry buffer; and (iii) on the current usage of that instr
ument's data allocation for the present orbit around Mars.