GPS position-finding system and method of finding position...

Details GPS position-finding system and method of finding position... GPS position-finding system and method of finding position...

2007-07-17

2007-07-17

Tarcza, Thomas H. (Department: 3662)

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

Directive

Including a satellite

Reexamination Certificate

active

10980825

ABSTRACT:
A position-finding system is comprised of a terminal having a global positioning system (GPS) for finding a position thereof, and a server which calculates altitude data, based on terrain data in an area in which the terminal is. The terminal includes a controller which selects one of three-dimensional position-finding in which a position is calculated through the use of four or more satellites and two-dimensional position-finding in which a position is calculated in a circumference in which only three satellites can be captured, in accordance with the altitude data provided from the server.

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patent: 7096233 (2006-08-01), Mori et al.
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patent: 4-370711 (1992-12-01), None
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