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. 22, 2009
Filed:
Oct. 05, 2007
Applicant:
Charlie Vacher, Paris, FR;
Inventor:
Charlie Vacher, Paris, FR;
Assignee:
Sagem Defense Securite, Paris, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01S 1/00 (2006.01); G01S 5/14 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method of locating a moving element by determining a reference position and at least one overall protection limit on the basis of data from a group of satellites in a constellation of satellites. The method comprises the steps of selecting from the group of satellites a subgroup comprising at least five satellites, calculating positions from the data from the group and from the data from the subgroup, and calculating corresponding protection limits while distinguishing whether the failure in the constellation does or does not affect the satellites under consideration.