GNSS Dynamic PPP Based on Additional Priori Coordinate and Epoch Constraints Information
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With real-time communication transmission technology development and global GNSS gradually increasing the number of continuous tracking station, No base station to support real-time Precise Point Positioning (RTPPP) technology gradually been widespread concern and applications. Especially in some type of slowly varying time monitoring and early warning of geological disasters. Disasters such as landslides, mine subsidence, earthquake monitoring. In order to avoid divergent positioning results, real-time precise point positioning technology in general can be sequential adjustment method solver. Since real-time PPP technology is a dynamic PPP positioning, coordinates are not generally adding constraints but choosing single epoch estimation. Considering some the motion characteristics of low moving carriers, the carrier has known more precise priori coordinates before positioning itself. At the same time the carrier at a certain fixed length of time (e.g. 2 h) can be considered stationary. The a priori information can be used to help improve the positioning accuracy of the carrier real-time PPP. Based on this starting point, in this paper, A real-time precise point positioning (PPP) technology based on priori coordinate and epoch constraints information. And use the Chang’an University Compass Analysis Center provides real-time BDS orbit and clock products. Combined with BDS monitoring data for experimental verification. Demonstrated the effectiveness of the algorithm and accuracy.
KeywordsReal-time Precise point positioning Priori coordinate Epoch constraint
Geographic Information Engineering National Key Laboratory Fund (SKLGIE2013-Z-2-1), State Key Laboratory of Aerospace Dynamics Fund (2013ADL-DW0103), National Natural Science Foundation Youth Foundation (41304033, 41104019,41274005), second navigation significant special issue (GFZX0301040308), China geological Survey geological survey project (1212011220186).
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