Patent ID: 6941145

Claim:
A radio communication terminal for a position specifying system including a base station, a position information server and GPS satellites, the radio communication terminal comprising: means for receiving, from the position information server through one communication base station, both retrieval timing and retrieval time that have been set with respect to each of the GPS satellites by the position information server; and means for transmitting at least GPS satellite information to the position information server so that the position information server specifies a position of the radio communication terminal based upon the received information, the radio communication terminal further comprising: means for correcting at least any one of the retrieval timing and the retrieval time, which are related to the GPS satellites notified from the position information server, in such a manner that the retrieval timing is moved or the retrieval time is prolonged, and means for retrieving the GPS satellites based upon the corrected retrieval timing and retrieval time to acquire the GPS satellite information so that the acquired GPS satellite information is transmitted to the position information'server via the communication base station, wherein the correcting means sorts the GPS satellites notified from the position information server in the order of higher elevation angles, and corrects at least any one of the retrieval timing and the retrieval time, which are related to the GPS satellites notified from the position information server, in the order of the higher elevation angles of the GPS satellites.