Method of estimating the error in the calculation of the positio

Details Method of estimating the error in the calculation of the positio Method of estimating the error in the calculation of the positio

1993-10-05

1994-12-13

Blum, Theodore M.

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

Directive

Including a satellite

455 121, H04B 7185, G01S 502

Patent

active

053732987

ABSTRACT:
In a method of calculation by a GPS receiver of the position of a mobile in space and time relative to a predetermined frame of reference, the position is calculated from data supplied by at least four GPS satellites selected by the GPS receiver to form a calculation constellation. The method includes the step of estimating the error in the position calculation. This error is estimated by the GPS receiver for each calculated position. The estimated error therefore varies with the position of the mobile.

REFERENCES:
Patent Abstracts of Japan, vol. 13, No. 209 (P-871) May 17, 1989 & JP-A-10 26 177 (Furuno Electric Co Ltd) Jul. 21, 1989.
IEEE Plans '88 Position Location and Navigation Symposium, No. 29--Dec. 2, 1988, Kissemmee, Fla., US; Cariveau et al.: "Satellite Data Management in DoD Navstar GPS Receivers", pp. 134-144.
Navigation: Journal of the Institute of Navigation, vol. 25, No. 2, Summer 1978, US., Milliken et al: "Principle of Operation of NAVSTAR and System Characteristics", pp. 95-106.
Proceedings of the IEEE, vol. 71, No. 10, Oct. 1983, New York, US; Parkinson et al: "NAVSTAR: Global Positioning System-Ten Years Later", pp. 1177-1186.
Toute L'Electronique, No. 511, Feb. 1986, Paris, France; "Navigation et positionnement par satellite: le systeme Navstar-GPS", pp. 54-62.

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