SATELLITE POSITIONING SYSTEM, GROUND STATION, AND GROUND TERMINAL THEREOF

摘要

PROBLEM TO BE SOLVED: To solve the problem that the constitution of a terminal becomes complicated since a D-GPS requires a GPS antenna for receiving radio waves from satellites and an antenna for receiving FM radio waves. SOLUTION: Satellite orbit information and error information are included in radio wave signals from the satellites 101 and transmitted to the terminal 104. A ground station 102 is provided with an orbit computing device 104 and a positioning error estimating device 105 for including the function parameters of positioning errors. Data from the two devices is composed, coded, and transmitted to the satellites 101 from a transmitting device 106. The data is interpreted, and positioning computations including error correction computations are performed at the terminal 103. The positioning errors are computed area by area from data on meteorological information, etc.