Patent ID: 7646338
Filing Date: 2010-01-12
Classification: G01S

Abstract:
1. Method of management of positioning satellite signals ( 15 a , 15 b , 15 c ) coming from a first constellation of satellites (GPS, 26 ) and a second constellation of satellites (Galileo, 25 ) of a first and a second satellite location system for locating a mobile terminal ( 27 ) of a cellular communication network capable of exchanging satellite signals with the first and second satellite location systems (GPS, Assisted GPS, Galileo, Assisted Galileo), said method comprising: determining an approximate pre-location of the terminal; estimating the position of the satellites of said first and second constellations; resolving a list of satellites visible from the terminal as a function of the approximate pre-location of the terminal and the estimated position of the satellites; calculating the elevation and the azimuth of each satellite from the list of satellites visible from the terminal as a function of the approximate pre-location of the terminal; and sorting the satellites from the list of visible satellites by: giving preference to one of said satellite constellations on the basis of a performance criterion, excluding (