This study investigated the use of ballistic and Double-Dip' aerobraking reentry to return the Space Maneuver Vehicle (SMV) from geotransfer orbit in no more than two atmosphere passes. Lift and drag accelerations were applied to the two body problem when either of their magnitudes exceeded 111000 g. Lft and drag coefficients, along with the SMV model, were taken from Investigation of Atmospheric Reentry tor the Space Maneuver Vehicle by Captain McNabb, AFIT/GA/ENY/O4-M03. Target perigees were formulated using the two-body problem. The orbit from each target perigee was numerally integrated around a planar earth model using a fourth order Runge-Kutta method. Ballistic and 'Double-Dip' reentry schemes were attempted with 45 and 70 km altitude floors. Ballistic reentry produced a near circular, low earth orbit when the SMV's true perigee altitude resided between 66.801 and 68.449 km for a one pass reentry and between 72.226 and 73.445 km for a two pass reentry. 'Double-Dip' reentry produced a near circular, low earth orbit when the SMV's perigee altitude rested between 62.416 and 64.962 km. The resulting perigee windows, their respective heating rates, and experienced accelerations were analyzed. Effects of uncertainty in the atmosphere model on successful perigee windows for each reentry scheme were analyzed by repeating the simulation with an increased atmospheric density.
Investigation of Aerobraking to Return the Space Maneuver Vehicle to Low Earth Orbit from Geotransfer Orbit (CD-ROM)
2005
pages
Report
Keine Angabe
Englisch
Spacecraft Trajectories & Flight Mechanics , Reentry vehicles , Atmosphere entry , Aerodynamic lift , Aerodynamic drag , Uncertainty , Earth orbits , Acceleration , Altitude , Runge kutta method , Perigee , Atmospheric density , Ballistics , Planar structures , Heating , Low orbit trajectories , Maneuverability , Spacecraft , Multimedia(Cd-rom)
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