| 摘要 |
PROBLEM TO BE SOLVED: To provide a position measuring method for a mobile station during the loss of a satellite radio wave (when there are less than three supplementary satellites). SOLUTION: By this position measuring method, the position (XB, YB) of the mobile station is found by a regular analysis expression which is used when carrier waves can be received from four satellites while the elliptic body height of the mobile station is made constant. The position (XA, YA, ZA) of a base station in an earth coordinate system is already known, a pseudo-noise code signal of an L1 band (1575.42 MHz) or an L2 band (1227.6 MHz) from an artificial satellite is received by a GPS receiving antenna and decoded by the GPS receiver, and its corrected data are sent to the mobile station through a corrected data transmitter and a transmitting antenna.
|
