06941138 is referenced by 31 patents and cites 408 patents.

A method for communicating between a user terminal and multiple stratospheric transponder platforms includes the steps of positioning a plurality of stratospheric transponder platforms (102, 104, 106, 108) in a substantially fixed position (152) with respect to a user terminal antenna (116) coupled to a user terminal (117) and communicating between the user terminal (117) and at least two of the plurality of stratospheric transponder platforms (102, 104, 106, 108) concurrently.

Title
Concurrent communications between a user terminal and multiple stratospheric transponder platforms
Application Number
9/655498
Publication Number
6941138 (B1)
Application Date
September 5, 2000
Publication Date
September 6, 2005
Inventor
Alan Cha
Glendale
CA, US
Donald C D Chang
Thousand Oaks
CA, US
Agent
Georgann S Grunebach
Assignee
The DIRECTV Group
CA, US
IPC
H04Q 007/20
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