| 摘要 |
PURPOSE:To perform a positioning operation with high accuracy by a method wherein a propagation distance error which has been measured by a fixed reference station is transmitted to a mobile station and a piece of information on the position of the mobile station is obtained from a piece of information on the distance, between a GPS satellite and the mobile station, which has been measured by the mobile station and from the propagation distance error. CONSTITUTION:A fixed reference station A is composed of a GPS receiver 1, an interface 2 for positioning data processing use and a fixed wireless apparatus 3. The interface 2 computes the true distance between GPS satellites 4a to 4c and the fixed reference station by using a piece of starting data S1, for the GPS satellites, which is obtained from the receiver 1. At the same time, a propagation distance error included in the measured distance, between the GPS satellites and the fixed reference station, which is obtained by the receiver 1 is drawn; it is formed as a piece of data so that satellite numbers for the satellites 4a to 4c and the propagation distance error coincide with the frame format of a control channel 5. A piece of information on an error which is transmitted through the control channel 5 from the reference station A is received and demodulated by a wireless apparatus 3 in a mobile station B; it is input to an interface 2; the propagation error is eliminated by using a piece of information S2 on an error; a piece of new data in obtained. |
