BeiDou/GNSS Wide-Area Precise Positioning Technology and Service: Current Situation and Prospects

Global navigation satellite system (GNSS) precise positioning service have been widely applied in various industries such as national defense construction, smart cities, transportation, smart robots, unmanned aerial vehicle (UAV), etc., the technology and service application of precise positioning continue to develop in recent years. Firstly, it summarizes separately the research progress of precise positioning technologies represented by precise point positioning, precise point positioning with ambiguity resolution, and precise point positioning and real time kinematic in the aspect of multi-system and multi-frequency, atmospheric correction and ambiguity resolution. Secondly, it reviews the service capacity, scope and other aspects and long-term development plan of precise positioning service for major satellite navigation systems; Then, the characteristics, service capabilities, and application progress of precise positioning service and technology provided by mainstream commercial companies were discussed; Finally, the challenges faced by GNSS precise positioning service at present, their development trends, and future prospects were analyzed.