Method and apparatus for satellite positioning

Details Method and apparatus for satellite positioning Method and apparatus for satellite positioning

2006-11-14

2006-11-14

Phan, Dao (Department: 3662)

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

Directive

Including a satellite

C342S357490

Reexamination Certificate

active

07136015

ABSTRACT:
When there is a large difference greater than a threshold value between a position determined at a time in satellite positioning by a GPS receiver based on a propagation delay of signals received from a GPS satellite, and an anterior position determined at an anterior time in satellite positioning by the GPS receiver, in position determination in a first period after the times, a present position is found based on a velocity vector found at the anterior time by the GPS receiver based on a Doppler shift occurring in the signals received from the GPS satellite and a previously determined position. In position determination in a second period after the first period, the present position is found based on a velocity vector found in the second period and the previously determined position. After that, processing is returned in which a satellite-determined position is used as a determined position.

REFERENCES:
patent: 6191731 (2001-02-01), McBurney et al.
patent: 6211819 (2001-04-01), King et al.
patent: 6415229 (2002-07-01), Diekhans
patent: 2005/0055160 (2005-03-01), King
patent: 2005/0143949 (2005-06-01), Hagstedt
patent: H05-297104 (1993-11-01), None
patent: H06-011560 (1994-01-01), None
patent: H06-066916 (1994-03-01), None

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