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System Concepts in Astronautics
Ascent Trajectories and Satellite Orbits
Lunar and Interplanetary Trajectories
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acceleration accelerometer aerodynamic altitude Amplitude modulation angle angular antenna ascent atmosphere axis battery capability capsule cell chemical closed ecological system density determined developed device distance drag earth satellites earth's atmosphere effect electric electrons energy equation escape velocity force frequency fuel gimbal gravitational ground station guidance system gyro heat inertial guidance systems initial interplanetary limited liquid lunar magnetic field maneuver mass meteoroids method micrometeoroids miles minimum missile mission modulation moon motion nautical miles nuclear obtained operation optical orbit period orbit plane output oxygen particles payload perigee phase planet planetary position power supply pressure probes produce Project Mercury propellant propulsion systems protons pulse radiation radio ratio re-entry reactor rocket engine rotation shown in Fig signal solar solar cells space flight space vehicle specific impulse stage surface telescope temperature thermal thrust tion torque trajectory transmitter vehicle system vehicle's velocity voltage