Economic potential of communication satellites
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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Dynamic characteristics of gravity gradient stabilization and damping system
Effects of variations in orbital altitude, lens radius of curvature, and lens included angle on physical characteristics of gravity gradient stabilized lenticular satellite configurations
Flexure rigidity and tensile strength of Dacron- glass yarn and fiberglass
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The 85-ft. diameter aerial at Goonhilly Downs, Cornwall uses a focal-plane paraboloidal reflector illuminated from a primary feed at the focus, Circularly polarized waves are transmitted and received. For optimum gain and uniformity of the aerial radiation patterns, circular symmetry of the primary feed radiation pattern is desirable. The primary feed has therefore been made circularly symmetric.
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Doppler compensation for maintaining signal synchronization of time division multiple access
High power transmitters with potential applicability to satellite television broadcasting
Multichannel, continuous audio, still video, TV transmission systems for limited frequency spectrum system
Application of Gunn effect to coaxial and microstrip circuits and development of equivalent circuits
Status, cost/effectiveness, and telecommunication/satellite requirements of computer-based instruction
Audio-Visual Satellite Instruction system (AVSIN) for USA - preliminary considerations
Choice of type and placement of thrusters on spacecraft (s/c) should include consideration of their effects on other subsystems. Models are presented of the exhaust plumes of mercury, cesium, colloid, hydrazine, ammonia, and Teflon rockets. Effects arising from plume impingement on s/c surfaces, radio frequency interference, optical interference, and earth environmental contamination are discussed. Some constraints arise in the placement of mercury, cesium, and Teflon thrusters. Few problems exist with other thruster types, nor is earth contamination a problem.
Efforts made to utilize space technology for solving communication and navigation problems faced by mobile users in earth orientated situations are outlined. Applications include transoceanic airline communications, reliable long range ship-shore communications, emergency communications in regions with rough terrain, and military operations.
Educational services which telecommunications satellites can provide and the design of systems used to deliver these services to the user are discussed.