High altitude satellite communications, with crosslinks

Computer Science

Scientific paper

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Communication Satellites, Computer Programs, Data Links, Central Processing Units, Orbit Perturbation, Satellite Communication, Satellite Orbits

Scientific paper

Analysis and FORTRAN programs that quantitatively describe the uplink, crosslinks, and down links for a 10 satellite, two ground-station satellite communications system are described. The existence of each link (accounting for earth obstruction for crosslinks and coverage for up/downlinks), angles, ranges, and Dopplers are given as outputs of the programs listed in less than one minute central processing unit (CPU) time on a 370/158 computer. General Keplerian orbits are allowed (0 equal to or less than eccentricity equal to or less than 0.99). A new analysis is presented, which results in simple estimates of orbital stability as a function of lunar perturbations. Thus, very general satellite communication orbits (altitude range 3000 to 250,000 nautical miles) can be analyzed with little additional CPU time.

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