High precision single point positioning system of single frequency global positioning system (GPS) and method

Abstract

The invention provides a high precision single point positioning system of a single frequency global positioning system (GPS) and a method, which belong to the technical field of GPS positioning. The positioning system is provided with a single frequency GPS receiver which finishes the processing of a GPS baseband signal, tracing of a GPS signal and pressure-volume-temperature (PVT) resolving and provides required GPS observation data and various error correcting information for a precision single point positioning solving module. The receiving of various correction data and loading of information of international GPS service (IGS) precise ephemeris, clock error, ionospheric delay and the like are finished by wireless communication module general packet radio service (GPRS) through wireless networks. The wireless communication module GPRS performs ionospheric delay error correction, satellite clock error correction and satellite track error correction, and utilizes IGS network data to finish precision single point positioning processing. An ARM core plate receives various observation data, satellite-based augmentation system (SBAS) observation data and various correction data of the wireless communication module and performs automatic processing computing of precision single point positioning algorithm. The single frequency GPS high precision single point positioning system and the method have the advantages of being simple in data collection and high in precision, and the feasibility and flexibility of the precision positioning are improved.

Description

technical field [0001] The invention relates to the technical field of GPS positioning, in particular to a single-frequency GPS high-precision single-point positioning system and method. Background technique [0002] Since the establishment of GPS in 1993, satellite positioning technology has been widely used in navigation, measurement, timing, space technology, etc., and has become the third new growth point of IT after communication and Internet. GPS positioning methods are divided into relative positioning and absolute positioning. The latter is also called single point positioning. Since GPS was put into use, its relative positioning positioning method has developed rapidly. From the first code relative positioning to the current RTK positioning, the positioning accuracy of GPS has been continuously improved. However, the development of absolute positioning, that is, single-point positioning, is relatively slow. Traditional GPS single-point positioning is carried out by...

AI Technical Summary

Problems solved by technology

However, the pseudo-range differential positioning can only provide sub-meter positioning accuracy. If the RTK function is used, the operating range generally does not exceed 15 kilometers, so the working distance cannot meet the requirements.

Research on dual-frequency single-point positioning is quite mature, but dual-frequency receivers are expensive and not suitable for promotion

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