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:
Mar. 22, 2016
Filed:
Aug. 30, 2011
Sebastien Vourc'h, Paris, FR;
Sebastien Vourc'h, Paris, FR;
SAGEM DEFENSE SECURITE, Paris, FR;
Abstract
According to a first aspect, the invention relates to a method for checking the integrity of position information output by a satellite (GNSS) positioning device () including a bank () of Kalman filters each producing a navigation solution (dX, dXi, dXn) from raw measurements of signals transmitted by the satellites, characterized in that the method comprises the steps of, for each filter in the bank: (i) correcting the navigation solution produced by the filter according to an estimate of the impact of a failure of a satellite on the navigation solution; (ii) calculating a cross-innovation reflecting the deviation between an observation corresponding to a raw measurement from a satellite not used by the filter and an a posteriori estimate of said observation from the navigation solution produced by the filter and corrected in accordance with step (i); and (iii) performing a statistical test of the cross-innovation in order to declare whether or not the satellite, the raw measurement of which is not used by the filter, is faulty.