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METHOD OF DETERMINING NAVIGATION PARAMETERS FOR A CARRIER AND HYBRIDIZATION DEVICE

  • US 20120123679A1
  • Filed: 07/09/2010
  • Published: 05/17/2012
  • Est. Priority Date: 07/10/2009
  • Status: Active Grant
First Claim
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1. A process for determination of navigation parameters of a carrier by a hybridisation device comprising a Kalman filter (3) working out a hybrid navigation solution from inertial measurements calculated by a virtual platform (2) and raw measurements of signals emitted by constellations of satellites delivered by a satellite-positioning system (GNSS), characterised in that it comprises the steps of:

  • determination for each satellite of at least one (Ir, Ir′

    ) probability ratio between a hypothetical breakdown of a given type of the satellite and a hypothetical absence of breakdown of the satellite,declaration of a breakdown of given type on a satellite as a function of the (Ir, Ir′

    ) probability ratio associated with this breakdown and a threshold value,estimation of the impact of the declared breakdown on the hybrid navigation solution, andcorrection of the hybrid navigation solution as a function of the estimation of the impact of the declared breakdown.

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