Error Analysis And Processing Of RTK Technology In GPS/BDS Combined Positioning

At present,the application of satellite navigation and positioning system in all walks of life.Because of its global,all-weather,continuous,real-time and other advantages.Therefore,the accuracy of navigation and positioning is to restrict its extension to a wider area of the constraints of the bottleneck.With the gradual maturity of Navigation Satellite System GNSS(Global),the combined positioning system of multi satellite system has stronger survivability and broad application prospects.RTK(Time Kinematic Real)technology is an important technology to improve the positioning accuracy and lower terminal costs.Reducing or eliminating the error of RTK technology is the key to improve the positioning accuracy.In this paper,based on the practical application of RTK technology in GPS/BDS combination positioning,the error of RTK technology in the combined positioning system is studied.The main contents are as follows:1)on GPS,BDS time,the coordinate system briefly,and the relationship between the combination system and single system between the time and the coordinate system is discussed to illustrate.The positioning theory of RTK technology in the integrated positioning system were derived.2)the error of the RTK technology in the combined positioning system is analyzed,and the advantages and disadvantages of various error correction models and methods are discussed.3)the core problem of RTK technology is derived-the integer ambiguity resolution and the detection and repair of cycle slip are derived.4)discusses the problems of RTK Technology in the random model GPS/BDS integrated positioning system of fixed weight,through on a variety of model in which the contrast analysis,obtained by Helmert variance component estimation to determine the combination system of the weight matrix is more reasonable.5)the influence of Helmert variance component estimation on the performance of the different satellite altitude angle and different location systems is analyzed.6)the influence of some error correction models on the positioning accuracy and the positioning accuracy of GPS,BDS and GPS/BDS combined positioning system is verifiedby example.