Computer Science – Performance
Scientific paper
Jun 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978stin...7914136g&link_type=abstract
Unknown
Computer Science
Performance
Atmospheric Entry, Mars Sample Return Missions, Mars Surface Samples, Reentry Vehicles, Spacecraft Reentry, Aerodynamic Brakes, Earth Orbits, Earth-Mars Trajectories, Graphs (Charts), Spacecraft Recovery, Systems Analysis
Scientific paper
The analysis has concerned itself with evaluating alternative methods of recovering a sample module from a trans-earth trajectory originating in the vicinity of Mars. The major modes evaluated are: (1) direct atmospheric entry from trans-earth trajectory; (2) earth orbit insertion by retropropulsion; and (3) atmospheric braking to a capture orbit. In addition, the question of guided vs. unguided entry vehicles was considered, as well as alternative methods of recovery after orbit insertion for modes (2) and (3). A summary of results and conclusions is presented. Analytical results for aerodynamic and propulsive maneuvering vehicles are discussed. System performance requirements and alternatives for inertial systems implementation are also discussed. Orbital recovery operations and further studies required to resolve the recovery mode issue are described.
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