The use of resistive electric heaters or radioisotope heaters to keep a reentry vehicle’s heat shield which melts orĪBMA: Army Ballistic Missile Agency (USA).Ībsolute zero: The temperature at which all heat action ceases, -273.16 oC (-459.69 oF).Īcceleration: A change in velocity, including changes of direction and decreases as well as increases in speed.Īccelerometer: A device that senses changes in speed along its axis. The erosion of a solid body by a high-temperature gas stream moving AACS: Attitude & Articulation Control Subsystem.ĪAF: Association Astronautique Francaise.
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