Method and apparatus for operating a satellite positioning syste

Details Method and apparatus for operating a satellite positioning syste Method and apparatus for operating a satellite positioning syste

1998-05-04

2000-08-15

Tarcza, Thomas H.

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

Directive

Including a satellite

34235701, 701213, G01S 502, H04B 7185

Patent

active

061043389

ABSTRACT:
A method and an apparatus for operating a satellite positioning system (SPS) receiver in a client/server architecture. In one example of a method, a first plurality of pseudoranges is determined at a first time and a second plurality of pseudoranges is determined at a second time which is after the first time. The first and the second pluralities of pseudoranges are stored. After the second time, the first and the second pluralities of pseudoranges are transmitted to a location server, normally in one transmission. The location server then determines a first position from the first plurality of pseudoranges and a second position from the second plurality of pseudoranges. In one particular example, the first and second pseudoranges are transmitted in response to a predetermined type of event, and the location server stores a collection of differential GPS data which has been collected over time.

REFERENCES:
patent: 5225842 (1993-07-01), Brown et al.
patent: 5563607 (1996-10-01), Loomis et al.
patent: 5621646 (1997-04-01), Enge et al.
patent: 5663734 (1997-09-01), Krasner
patent: 5702070 (1997-12-01), Waid
patent: 5786773 (1998-07-01), Murphy
patent: 5812087 (1998-09-01), Krasner

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