Patent ID: 9146320
Filing Date: 2015-09-29
Classification: G01S

Abstract:
1. A method for detection and exclusion of at least one pseudorange measured between a satellite and a receiver receiving signals emitted by different satellites of a radio-positioning constellation, when this pseudorange is faulty, characterised in that it comprises steps of: (a) Determining estimation of the position of the receiver from the pseudoranges measured by the receiver; (b) Estimating, from the accordingly estimated position, biases in the pseudoranges measured; (c) Processing accordingly obtained biases to deduce therefrom a value representative of the probability of failure for each pseudorange; (d) Pre-selecting, as a function of the accordingly obtained values, a given number of pseudoranges the likeliest to present failure; (e) Determining, for each combination of pseudoranges among the accordingly pre-selected pseudoranges, a variable test value representative of the likelihood of the failure of the combination; (f) Selecting, as a function of the accordingly obtained variable test values, at least one combination of pseudoranges failure of which is the likeliest; (g) Comparing the test variable associated with the selected combination at a predefined threshold and transmission of a signal to the receiver or outwards as a function of the result of this comparison.