A satellite communication system has a double-layered earth orbit satellite constellation with a lower first orbit altitude and a higher second orbit altitude. In the satellite communication system, first and second communication satellites are deployed in respective earth orbits located ...http://www.google.fr/patents/US5722042?utm_source=gb-gplus-shareBrevet US5722042 - Satellite communication system having double-layered earth orbit satellite constellation with two different altitudes
Satellite communication system having double-layered earth orbit satellite ...
