Azimuth and Elevation of Slightly Inclined Geostationary-satellite Orbits

Geostationary satellite working life must take into account various factors. When it is close to the end of life, although the satellite payload will still be effective, the remaining fuel is not sufficient to maintain their positions of latitude, but only enough for keeping their station of longitude. If they can be used for slightly inclined geostationary orbit (SIGSO) satellite communication, their working life will be effectively extended. This paper introduces the orbital characteristics of the SIGSO, and discusses the variation trend of the earth station antenna azimuth and elevation in such SIGSO satellite communication system. And the antenna pattern for the low-rate communication is put forward. Finally, the system experiments and results are given.