Ionosphere Integrity Monitoring Based on the Combined System of GPS and BDS

摘要

The ionosphere delay is one of the main error sources affecting the positioning and its changes are very complicate. Integrity is the ability which the system sending out warning signals to users when navigation system has any failure or error exceeding can't be applied for navigation and positioning service. As far as the user safety is considered, the integrity of the navigation system weights more than its precision. The ionosphere integrity monitoring is indispensable in order to guarantee the reliability and availability of the user positioning. With the increase of the number of the BDS satellites gradually, the BDS is more and more approaching perfection. The combined system data of GPS and BDS of the Hebei CORS were used to conduct ionosphere integrity monitoring in this paper. So the stable of ionosphere were discussed. The results showed that the ionosphere delay calculated by these data was stable and these data were available.