SPACE SHUTTLE GN&C EQUATION DOCUMENT No.17 (Revision 3) Entry and Transition Guidance

摘要

There are four basic guidance modes:n(1.) An initial programmed-maneuver mode in which the vehicle is oriented with a constant roll angle and angle-of-attack.n(2.) A constant heating-rate mode during which the stag¬nation-point heating rate is held constant at a pre¬selected value, chosen essentially to minimize heat loads on the vehicle without violating maximum temperature constraints.n(3.) A reference trajectory mode during which the vehicle follows a pre-stored trajectory designed to get the vehicle to the terminál point with a minimum re¬quired T PS weight, and without violating operational constraints on the vehicle.