Description: Originally written for use as a textbook in Department of Defense schools. Includes chapters on: The Space environment; Orbital mechanics; Propulsion systems; Space vehicle electrical power; Navigation, guidance, and control; Global communications; Atmospheric penetration; Directed energy systems; Building reliable spacecraft; and Bioastronautics. Five appendices cover: The Deorbiting problem; Determination of the angle between two orbiting planes; Introduction to radar; Orbital coordinate systems; and Signs and symbols.