Patent Document ID: 20120274511
Application ID: 13272049
Patent Flag: 0

Claim One:
1. A system for augmenting the performance of a satellite geolocation system including at least one satellite and at least one positioning receiver and defined by a nominal operating range, comprising: at least one system for measuring signals transmitted by said geolocation system, a processing centre receiving the measurements transmitted by the measurement system and producing anomaly correction or alert messages concerning the unavailability of said geolocation system to said receivers, terrestrial or satellite means for broadcasting said correction or alert messages to said receivers, wherein the correction or alert messages comprise a behaviour model of at least one of the satellites of said geolocation system incorporating new parameters with which to augment the operating range of said system, and an indicator of the deviation between said model and the real behaviour of said geolocation satellite, so as to enable the receiver to continue to use said geolocation satellite to determine its position, using the behaviour model, and outside the nominal operating range of the geolocation system, said parameters of the behaviour model comprising a model of distortion of the code chips transmitted by said navigation satellite to said receiver, or a model of distortion of the phase of the signal transmitted by said navigation satellite to said receiver.