Method of determining navigation parameters for a carrier and hybridization device associated with Kalman filter bank

A hybridisation device comprising a platform (2) capable of calculating inertial measurements, a Kalman filter (3) designed to devise a hybrid navigation solution from inertial measurements and raw measurements of signals emitted by constellations of satellites delivered by a satellite-positioning system (GNSS), each satellite being potentially affected bv a breakdown each breakdown being defined by a type of breakdown, further comprising:

• a detection module (41) configured to
• determine for each satellite at least one (Ir, Ir′) probability ratio which represents the probability that a breakdown of a given type affects said satellite, the probability ratio being computed based on data provided by the bank of Kalman filters, and declare a breakdown of given type on a satellite by comparison of the probability ratio associated with this breakdown with a threshold value, and
• an accommodation module (5) configured to estimate the impact of the declared breakdown on the hybrid navigation solution devised by the Kalman filter, and to correct the hybrid navigation solution as a function of the estimation of the impact of the declared breakdown.