Method and apparatus for an acquisition-aided Geo-locating subsc

Details Method and apparatus for an acquisition-aided Geo-locating subsc Method and apparatus for an acquisition-aided Geo-locating subsc

1996-07-31

1999-03-30

Issing, Gregory C.

Communications: directive radio wave systems and devices (e.g.,

Directive

Including a satellite

455456, G01S 502

Patent

active

058894926

ABSTRACT:
In a telecommunication system (15) with at least one gateway (1), at least one subscriber unit (2), a system controller (3), at least one communication satellite (4) and global positioning satellites (5), communication satellite (4) provides positioning information to subscriber units (2). System controller (3) uses links (13,14) with communication satellites (4) to control links (10,11) and links (8,9). Subscriber unit (2) receives on link (6) positioning information which is used by subscriber unit (2) to determine which global positioning satellites (5) are overhead. Knowing which global positioning satellites (5) are overhead allows subscriber unit (2) to more quickly acquire and track the global positioning satellites (5) required to accurately geo-locate itself. Subscriber unit (2) computes accurate location data and can transmit this data to gateway (1).

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