
Accession Number : AD0433606
Title : EARTH COVERAGE BY SATELLITE CONFIGURATIONS,
Corporate Author : RADIO CORP OF AMERICA BURLINGTON MASS AEROSPACE SYSTEMS DIV
Personal Author(s) : Norwood,Lawrence
Report Date : FEB 1964
Pagination or Media Count : 37
Abstract : The fundamental equations of orbital mechanics are stated, from which interrelationships among satellite altitude, speed, period, kinetic energy, potential energy, and field of view are derived analytically and depicted graphically. Attention is focused upon the northern hemisphere, and equations are derived which express the percentage of time that a satellite will view simultaneously all points north of a given latitude. Grazing incidence is assumed for mathematical convenience. Conclusions are drawn regarding the number of satellites required, as a function of altitude, to insure complete coverage of a polar cap or specific portion thereof, by one, two, or three orbital planes. Some consideration is given to orbital stability. It is demonstrated that the coverage afforded by elliptical orbits at critical inclination is superior to that provided by circular polar orbits. (Author)
Descriptors : (*SATELLITE NETWORKS, OPTIMIZATION), (*CELESTIAL MECHANICS, SATELLITE NETWORKS), EQUATIONS, ELLIPTICAL ORBIT TRAJECTORIES, AERIAL RECONNAISSANCE, POLAR ORBIT TRAJECTORIES, SYNCHRONOUS SATELLITES, MATHEMATICAL ANALYSIS
Distribution Statement : APPROVED FOR PUBLIC RELEASE