Approach guidance for outer planet Pioneer missions

Details Approach guidance for outer planet Pioneer missions Approach guidance for outer planet Pioneer missions

Sep 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974amst.iafcv....b&link_type=abstract

International Astronautical Federation, International Astronautical Congress, 25th, Amsterdam, Netherlands, Sept. 30-Oct. 5, 197

Physics

Optics

Approach Control, Mission Planning, Natural Satellites, Outer Planets Explorers, Pioneer Space Probes, Electro-Optics, Flyby Missions, Reference Stars, Saturn (Planet), Spaceborne Telescopes, Star Trackers, Uranus (Planet)

Scientific paper

An overall parametric system analysis of the use of an optical approach guidance measurement system (using a V-slit electrooptical 'star-pipper') onboard a Pioneer-type spin-stabilized spacecraft for outer planet missions. Optical measurements of satellites of Saturn and Uranus against the star background are considered. Measurement geometry and spacecraft attitude are evaluated in depth with respect to two Pioneer missions: Saturn-Uranus and Jupiter-Uranus atmospheric entry probe missions with departure from Earth in November/December, 1980. A preliminary evaluation of long-term attitude stability measurements of Pioneer 10 is presented in the Appendix. The major conclusions are: (1) at Saturn flyby, viewing some medium period satellites can provide the best measurement results. (2) At Uranus approach, viewing the planet may give best measurements if early bus-probe separation is required. (3) Final measurement accuracy depends on the data format transmitted to Earth and the applied data interpretation techniques.-

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