Patent ID: 7646338

Claim:
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 ( 24 ) from the list of visible satellites all of the satellites belonging to the constellations other than the preferred constellation having positions in azimuth and in elevation from the point of view of the terminal confined within a predetermined angular range relative to one of the satellites of the preferred constellation.