Abstract
T motion of slender vehicles during entry into a planetary atmosphere is oscillatory in nature unless positive means are employed to supply stabilization (some form of attitude control such as control surfaces or jets). Vehicles that are passive in their method of stabilization would be expected to oscillate during entry. Typically, the decay in the amplitude of oscillation of a vehicle descending into the atmosphere will be governed by two factors: the effective increase in the aerodynamic stiffness (pCTOa) due to the increase in density during descent, and the aerodynamic damping of the vehicle, which, for a slender configuration, is proportional to
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