A demonstration of dual spacecraft tracking conducted with the Viking spacecraft during the approach phase

Details A demonstration of dual spacecraft tracking conducted with the Viking spacecraft during the approach phase A demonstration of dual spacecraft tracking conducted with the Viking spacecraft during the approach phase

Feb 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978dsn..nasa...50c&link_type=abstract

In its The Deep Space Network p 50-66 (SEE N78-24187 15-12)

Physics

Interplanetary Transfer Orbits, Orbit Calculation, Spacecraft Tracking, Spacecraft Trajectories, Viking Orbiter Spacecraft, Data Reduction, Orbital Mechanics, Space Navigation, Trajectory Analysis

Scientific paper

The potential improvements in navigation capability of dual spacecraft tracking were demonstrated using Viking approach data. Under unfavorable conditions of large plasma noise, low spacecraft declination and large earth-spacecraft distance, the dual spacecraft tracking technique improved the Viking B approach accuracy based on short-arc radio metric data, by a factor of 7, to less than 200 km at Mars orbit insertion minus 3 days. From the results of an analytical expansion and the Viking demonstration with a large intentional error in Mars ephemeris, that dual spacecraft data types are shown to be insensitive to ephemeris error. Results also reveal the potential reduction of tracking time requirements during planet approach.

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