Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aiaa.conf..465l&link_type=abstract
IN: 1992 AIAA/AAS Astrodynamics Conference, Hilton Head Island, SC, Aug. 10-12, 1992, Technical Papers (A92-52051 22-13). Washin
Astronomy and Astrophysics
Astronomy
Astrodynamics, Atmospheric Entry, Landing Sites, Mars Landing, Site Selection, Three Body Problem, European Space Programs, Nasa Space Programs, Planetary Orbits, Spacecraft Maneuvers
Scientific paper
The feasibility of delivering several landers to the surface of Mars by separation from an approaching spacecraft (S/C) is investigated. The S/C has to perform a maneuver sequence to provide the correct initial conditions for the probes to reach preselected points. The relative position of the landing sites is strongly restricted by imposed entry conditions. For an arrival in October 2001 and a triple of landing sites placed around the Tharsis region about 3000 km apart a total amount of 65 m/s is needed if the targeting maneuvers take place five and two days before entry and the entry angles are restricted to -45 to -15 deg. For the accurate orbit integration near Mars the motion of the S/C is modeled by the differential equations of the restricted three-body problem with a suitable type of regularization to remove the singularity.
Hechler Martin
Lauer Mark
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