Computer Science – Performance
Scientific paper
Mar 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975elpr.confr....h&link_type=abstract
American Institute of Aeronautics and Astronautics, Electric Propulsion Conference, 11th, New Orleans, La., Mar. 19-21, 1975, 10
Computer Science
Performance
Comets, Rendezvous Spacecraft, Solar Electric Propulsion, Space Navigation, Mariner 9 Space Probe, Mission Planning, Rocket Engines
Scientific paper
Guidance and navigation (G & N) requirements are determined for a rendezvous mission with comet Encke utilizing a Solar Electric Propulsion Stage (SEPS). The most important part of the navigation subsystem and strategy is the use of the onboard optical system, or the approach guidance sensor (AGS). Assuming a Mariner 9 vidicon, a linear G & N analysis was performed and indicates that the AGS measurements overcome effects due to many errors which tend to dominate other SEPS missions. For example, a requirement for a dedicated program of astronomical observations of Encke, the use of multi-station radio data, and stringent accuracies on thruster performance are not as critical for this mission. In addition, a nonlinear guidance analysis was performed, and the results compared favorably with the linear analysis. The nonlinear study does, however, suggest that the role of the AGS in the G & N subsystem, and its ability to reduce target relative error, should be investigated further.
Boain Ronald J.
Hong Philip E.
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