05433726 is referenced by 86 patents and cites 67 patents.

A satellite-based cellular telecommunications system employing a constellation of telecommunications satellites in medium earth orbit to provide multibeam radio frequency (rf) communications links for worldwide cellular telephone service with a minimum number of satellites. The telecommunications satellites are placed in a plurality of inclined orbits about the earth at an altitude of between approximately 5600 and 10,000 nautical miles. The characteristics of the orbits, such as the number of orbits, the inclination of each orbit, the number of satellites in each orbit and the altitude of the satellites, are tailored to maximize the coverage area of the satellites and their related line-of-sight elevation angles, while minimizing propagation time delays, the number of beam-to-beam and satellite-to-satellite handovers, and the total number of satellites. The present invention also includes several additional features which essentially eliminate beam-to-beam and satellite-to-satellite handovers, thus dramatically reducing the likelihood of dropouts. between the plug and the anchor to prevent the plug from entering the opening in the vessel.

Title
Medium-earth-altitude satellite-based cellular telecommunications system
Application Number
688412
Publication Number
5433726
Application Date
May 28, 1992
Publication Date
July 18, 1995
Inventor
Roger J Rusch
Palos Verdes Estates
CA, US
Peter H Cress
Manhattan Beach
CA, US
Michael Horstein
Los Angeles
CA, US
Agent
Sol L Goldstein
William J Coughlin
Assignee
TRW
CA, US
IPC
H04B 7/185
B64G 1/100
View Original Source