A new kind of real-time PPP method for GPS single-frequency receiver using CORS network

The method of rapid and precise positioning using relatively cheaper single-frequency receivers in a wide area Has become one of the research hot spot in the present satellite geodesy at home and abroad. The author has proposed a new real-time modeling method based on the regional CORS network. And a new precise point positioning service for single-frequency receiver is also designed and realized. Through serial analysis of practical examples from the CORS networks of Shanxi Province, Hubei Province and Wuhan in China, this paper testifies the feasibility of providing real-time positioning service for single-frequency users based on the methods developed. The results verify that, for the reference network with a station separation of less than 71 km, user's single-differenced L1 ambiguity can be fixed within several seconds. Once the ambiguity is fixed, the single-frequency user could gain rapid and cm-level positioning service in absolute positioning mode. Our work provides a new way for the research of single-frequency rapid and precise point positioning.