METHOD OF DETERMINING NAVIGATION PARAMETERS FOR A CARRIER AND HYBRIDIZATION DEVICE ASSOCIATED WITH KALMAN FILTER BANK

摘要

Method of determining navigation parameters for a carrier by a hybridization device comprising a bank (3) of Kalman filters each formulating a hybrid navigation solution on the basis of inertial measurements calculated by a virtual platform (2) and of raw measurements of signals emitted by a constellation of satellites delivered by a satellite positioning system (GNSS), characterized in that it comprises the steps of: - determination, for each satellite, of at least one likelihood ratio between a hypothesis regarding a fault of a given nature of the satellite and a hypothesis regarding absence of fault of the satellite, - declaration, of a fault of a given nature on a satellite as a function of the likelihood ratio associated with this fault and of a threshold value, - estimation of the impact of the declared fault on each hybrid navigation solution, and – correction of the hybrid navigation solutions as a function of the estimation of the impact of the declared fault.