Real-time precise point positioning method based on satellite clock and R-orbit error mixed estimation

Abstract

The invention discloses a real-time precise point positioning method based on the satellite clock and R-orbit error mixed estimation. A real-time satellite clock error estimation terminal and a mobile station client terminal are adopted. The method includes that the real-time satellite clock error estimation terminal estimates the satellite clock errors in real time through broadcast Ephesus and regional CORS continuous observation data and transmits to a mobile station through a mobile network rapidly; the mobile station client terminal receives GNSS observation data and acquires and decodes satellite clock error data through the mobile network, and the precise point positioning is performed after data p reprocessing. By the aid of the method, the positioning precision and convergence time of precise point positioning are improved and increased significantly on the basis of the IGS real-time data flow method, the small-scale CORS application is supported, and the limitation that satellite orbit determination requires a large range of ground stations is overcome; a user of the mobile station only receives the real-time satellite clock error correcting data instead of precise orbit data, and the network communication load is reduced.

Description

technical field [0001] The invention relates to the field of global navigation satellite system (GNSS) satellite positioning, in particular to satellite clock difference inversion and GNSS inter-satellite single-difference precision single-point positioning. Background technique [0002] Precise Point Positioning (PPP) is a frontier theory and a hot issue in the field of satellite navigation and positioning. PPP technology uses the correction information in the parameter domain to achieve precise positioning, and can achieve high-precision positioning at any position under the global ITRF framework through a dual-frequency receiver. The realization of this technology will change the status quo of relying on the double-difference mode to obtain high-precision position information, and it can get rid of the regional restrictions caused by the relative positioning of ground reference stations. It has important and broad application prospects. In the process of PPP calculation,...

AI Technical Summary

Problems solved by technology

Even for the latest real-time data stream products provided by IGS, there is a lag time of about 30 seconds in orbit and clock products, which cannot meet the needs of PPP real-time calculations directly; the fixed sampling interval of real-time data stream products cannot meet the needs of vehicles, ships, The application needs of high sampling rate of aircraft and other carriers; the broadcast stability of real-time data stream products is easily affected by factors such as network communication

Generally speaking, the PPP positioning method based on the third-party precision orbit and clock error products is suitable for post-event algorithm research, but it is difficult to meet the needs of real-time positioning

Images