AIAA Journal · 1963 · 94 citations · 21 references
EngineeringAerospace EngineeringSystems EngineeringFlight DynamicsFlight MechanicsVehicle DynamicsAerodynamic DesignAtmospheric Drag EffectsAtmospheric Effects On FlightAtmospheric Equations Of MotionFlight PerformanceAtmospheric Entry TrajectoriesDrag CoefficientEntry GuidanceFlight Path AngleFlight Path Angle DynamicsOrbital VelocityRe-entry DynamicsSurface Area
measured acceleration D/W, gr's drag coefficient lift coefficient drag, force along the total velocity vector ( Ib local gravitational acceleration, ft/sec altitude, distance along radial axis, ft constant feedback control gain lift, force normal to the total velocity vector (<7z,$/ 2)PVVb distance from planet center, ft surface area upon which force coefficients are based, ft differential operator notation time circumferential velocity normal to radius vector, fps dimensionless ratio u/(circular orbital velocity), u/ (gr) total velocity, fps vertical velocity along radial axis, fps weight of vehicle, Ib downrange, distance to destination along great circle route, ft vehicle angle of attack atmosphere density decay parameter, ft ~~ variation in quantity from that of nominal trajectory flight-path angle, positive for climb influence function time-varying feedback control gain atmosphere density, slugs /ft* vehicle roll angle heading angle between the instantaneous great circle route and the great circle route to the target damping factor = natural frequency final value initial value : respect to nominal trajectory
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