Patent ID: 8514127
Filing Date: 2013-08-20
Classification: G01S

Abstract:
1. A method of calculating low probability events for evaluation of precision performance of a satellite navigation system comprising a space segment transmitting radiolocation signals to a receiver segment, comprising the steps: measuring, with a system, an estimated error of location of a receiver of the system for a plurality of samples and calculating a maximum location error threshold, being a protection radius, that can be guaranteed by the system for said samples, the estimated error and the protection radius being defined in a dimension of a position frame of reference, calculating, with the system, a first proportion of a distribution of samples satisfying the conditions: calculating, with the system, a second proportion of the distribution of samples satisfying the conditions: modelling, with the system, at least one component of the distribution of samples, the component representing the samples of low probability of occurrence of the distribution and the modelling being calculated by applying the theory of extreme values on the basis of observed samples of the distribution.