Aerobraking for capture into Martian orbit

Details Aerobraking for capture into Martian orbit Aerobraking for capture into Martian orbit

Dec 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990fmet.symp..491s&link_type=abstract

In NASA, Goddard Space Flight Center, Flight Mechanics/Estimation Theory Symposium, 1990 p 491-510 (SEE N91-17073 09-13)

Physics

Aerobraking, Aerocapture, Flight Paths, Manned Spacecraft, Mars (Planet), Mars Atmosphere, Spacecraft Trajectories, Atmospheric Effects, Atmospheric Models, Random Processes

Scientific paper

A summary is given of several studies into problems associated with aerobraking a manned vehicle into a Martian capture orbit. The problems investigated are the establishment of entry flight path angle windows that allow aerocapture; the determination of the sensitivity of the entry trajectory to initial flight path angle; the determination of the effect on aerocapture of the assumed Martian atmosphere model; and the determination of the effect of random atmosphere disturbances on adaptive guidance systems that may be used for aerocapture. As a result of investigating the above problem areas, entry windows were established for three different vehicle configurations. Sensitivities to changes in initial flight path angle were also obtained for these three configurations. One configuration was chosen to determine the effect of Martian atmospheric model changes and random variations of density within a specific atmospheric model. Of particular interest was the effect of random density variations on adaptive guidance techniques. The effect of entry velocity on the size of the entry window was also examined.

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