Lyle D. Filkins

Peer Reviewed

Abstract: The concept, hypothetical performance and potential uses of a position-fixing system applicable to both surface ships and objects and to air and space vehicles are presented. This system concept has been named LOCATES, for Location of Air Traffic Enroute by Satellite. Three spherical survaces of positio, each containing the vehicle whose position is unknown, are established. Two of these are formed by simultaneously measuring the range from each of two stationary satellites (with known position) to the vehicle in question. The third is formed by knowledge of the vehicle altitude and its general geographic location; these may be known beforehand, as with ships, or may be measured on the venicle and transmitted to a central computing facility, as with aircraft. The intersection of these three surfacs uniquely establishes the required position, except for one easily resolved ambiguity.
Published in: NAVIGATION: Journal of the Institute of Navigation, Volume 11, Number 4
Pages: 379 - 386
Cite this article: Filkins, Lyle D., "LOCATES: A WAY-OUT APPROACH TO NEAR-BY POSITION FINDING", NAVIGATION: Journal of The Institute of Navigation, Vol. 11, No. 4, Winter 1964-1965, pp. 379-386.
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