MESSAGE BROADCAST APPARATUS AND METHOD FOR ENHANCED PARAMETER BROADCAST IN A SATELLITE NAVIGATION SYSTEM

摘要

The present application provides a satellite positioning method and a satellite positioning system. The system comprises a satellite, a base station, an observation station. The observation station is provided with a monitoring terminal and a correction parameters information generating apparatus, the monitoring terminal receiving observation data transmitted from the satellite; the correction parameters information generating apparatus generating a correction parameters based on the observation data, the correction parameters being transmitted to the base station. The base station is provided with a switch and a message parameter superimposition-encoding-and-broadcasting apparatus, the switch receiving a basic navigation message from the satellite; the message parameter superimposition-encoding-and-broadcasting apparatus encoding the correction parameters into the basic navigation message by protocol superimposition, and setting the broadcasting of the integrated-encoded message into which the correction parameters is encoded, the integrated-encoded message being transmitted to the satellite by the switch via an uplink injection link. The satellite broadcasts the integrated-encoded message received from the base station, wherein the correction parameters comprises a partition comprehensive correction and one or more of a satellite orbit correction, a satellite clock difference correction and an ionosphere correction.