MUMBAI, India, Aug. 10 -- Intellectual Property India has published a patent application (202617073564 A) filed by Safran Electronics & Defense on June 13, 2026, for Method And Device For Detecting And Excluding A Satellite Failure.
Inventors include Fouin, Nathan; Nguyen, Maxime; Nguyen, Julien; and Demange, Jean-Luc.
The application for the patent was published on July 31, 2026, under issue no. 31/2026.
Abstract: The present invention relates to a method and a device for detecting and excluding a satellite failure, the device comprising a plurality of Kalman filters Fs1,...,FsN, each filter Fsi determining navigation data (NAV) of a mobile (AC) from pseudo-distances (PR) relating to a set of satellites S1,...,SN except for the satellite Si. In particular, the proposed method comprises, following the detection (S200) of a satellite failure, a step of identifying (S300) a faulty satellite Sx among the set of satellites S1,...,SN, this step (S300) comprising, for at least one satellite Sj assumed to be faulty: a step of identifying the filter Fsk excluding a satellite Sk distinct from the satellite Sj assumed to be faulty and a satellite failure indicator Rsk of which is at a maximum; a step of configuring (S320) an additional Kalman filter FA distinct from the filters Fs1,...,FsN, this additional filter FA being configured based on the filter Fsk; a step of resetting (S330) the additional filter FA, this additional filter FA excluding the satellite Sk and the satellite Sj assumed to be faulty; and a step of determining (S350) whether the satellite Sj is faulty based on a satellite failure indicator RA of the additional filter FA computed after a determined duration (TE).
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