The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 03, 1996
Filed:
Apr. 29, 1994
Applicant:
Inventors:
Jaime B Colley, Laguna Niguel, CA (US);
Thomas A Niemi, DeWitt, IA (US);
Assignee:
Rockwell International Corporation, Seal Beach, CA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01S / ;
U.S. Cl.
CPC ...
342357 ; 342352 ;
Abstract
A method for using a value of range rate observed by a receiver, such as a GPS receiver, to determine the coordinates of points on the surface of the earth from which this value of range rate would be observed. These coordinates are given in an earth-centered, earth-fixed (ECEF) coordinate system, and they form a locus of points of equal range rate. The coordinates of these points provide general estimates of the location of the receiver. By calculating multiple loci of points which intersect each other, a more precise determination of the location of the receiver may be made.