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Earth recovery mode analysis for a Martian sample return missionThe 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.
Document ID
19790005965
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Green, J. P. (Intermetrics, Inc. Cambridge, MA, United States)
Date Acquired
September 3, 2013
Publication Date
June 23, 1978
Subject Category
Astrodynamics
Report/Patent Number
NASA-CR-158047
IR-287
Accession Number
79N14136
Funding Number(s)
CONTRACT_GRANT: JPL-955036
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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