Computer Science – Performance
Scientific paper
Jun 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979aiaa.confs....p&link_type=abstract
American Astronautical Society and American Institute of Aeronautics and Astronautics, Astrodynamics Specialist Conference, Prov
Computer Science
Performance
Celestial Navigation, Circular Orbits, Orbit Calculation, Planetary Orbits, Radio Interferometers, Venus Probes, Very Long Base Interferometry, Accuracy, Graphs (Charts), Orbital Mechanics, Position Errors, Quasars, Spacecraft Guidance, Tables (Data)
Scientific paper
The use of narrowband delta-VLBI to achieve accurate orbit determination is presented by viewing a spacecraft from widely separated stations followed by viewing a nearby quasar from the same stations. Current analysis is examined that establishes the orbit determination accuracy achieved with data arcs spanning up to 3.5 d. Strategies for improving prediction accuracy are given, and the performance of delta-VLBI is compared with conventional radiometric tracking data. It is found that accuracy 'within the fit' is on the order of 0.5 km for data arcs having delta-VLBI on the ends of the arcs and for arc lengths varying from one baseline to 3.5 d. The technique is discussed with reference to the proposed Venus Orbiting Imaging Radar mission.
Ananda M.
Hildebrand C. E.
Poole R. S.
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