| 摘要 |
<P>PROBLEM TO BE SOLVED: To track the position of a property or object by using GPS as a base. <P>SOLUTION: Reference data are measured regarding the travelling period difference between signals that are transmitting from a plurality of satellites 12 and received by a tracking object 14. These data are transmitted to a central station 16, the position of the tracking object is calculated, based on transmitted data at the central station. In this case, a step which calculates the position of the tracking object is conducted, based on a satellite identification number, including data which identify each related satellite, based to the satellite identification number in the received data by the tracking object. <P>COPYRIGHT: (C)2007,JPO&INPIT |
