Navigation system, GPS terminal and navigation method using supplementary data in broadcast radio wave signal

摘要

A navigation system is constructed to set up navigation function of a GPS terminal by using radio signals of broadcast station before receiving GPS signals from GPS satellites. A GPS monitor server receives on the ground GPS signals transmitted from GPS satellites, a FM multiplex broadcast station transmits, using the radio signals, GPS supplementary information including the Almanac and Ephemeris data in a navigation message of the GPS signals received by the GPS monitor server. A GPS terminal starts, upon reception of the GPS supplementary information, reception of the GPS signals transmitted from the GPS satellites.