METHOD FOR ESTIMATING THE POSITION AND SPEED ERRORS OF AN INERTIAL PLATFORM WITH THE AID OF AN SAR IMAGING RADAR

METHOD FOR ESTIMATING THE POSITION AND SPEED ERRORS OF AN INERTIAL PLATFORM WITH THE AID OF AN SAR IMAGING RADAR The subject of the invention is a method for determining the position error and the speed bias of an inertial platform aboard a carrier pusuing a trajectory towards a target, characterized in that it furthermore comprises the following steps: acquiring aboard the carrier a series of SAR-type images of the target; utilizing the said images to measure on the basis of each of the images a measurement of the distance and a measurement of the Doppler of the target; estimating the precise position of the carrier with respect to the target and the speed error (corresponding to a bias over a small duration), on the basis of the measurements of distance and of the Doppler of the target with an estimator filter.