SATELLITE RADIO DETERMINATION

摘要

PROBLEM TO BE SOLVED: To precisely compute the position and the time by using a distance- measuring signal which is indicated by extended data and region extended data and in which an ionosphere delay and an error are corrected. SOLUTION: The satellite radio positioning system is provided with a global navigation service(GNSS) satellite 2 which generates a GNSS distance-measuring signal Rn , a geostationary satellite 6 which retransmits a distance-measuring signal Rg containing extended data A generated by a navigation land earth station(NLES), and a medium-altitude orbit(MEO) satellite 10 which generates a distance-measuring signal Ra containing region extended data RA transmitted from a satellite access node(SAN) 14. A navigation receiver 11 receives the distance-measuring signals Rg , Ra , Rn , and it computes ionosphere delay values regarding the distance-measuring signals provided at a double frequency. The receiver estimates ionosphere delay values regarding the distance-measuring signals provided at a single frequency by using the ionosphere delay values, the region extended data RA and the extended data A.