Research On Mobile Target Positioning Algorithm Based On RTK

Real Time Kinematic(RTK)is a difference processing method on carrier phase observation data of two receiver providing centimeter positioning solution.Good operability and wide application are the advantages of the method,which can provide more accurate location for mobile users,such as vehicles,ships or air crafts.In this paper,mobile target positioning algorithm based on RTK is designed.The research mainly includes the following parts.First of all,RTK positioning technology is studied and the observation data and navigation data which were collected near the airport combined with the RINEX data format are stored,parsed and processed.Then the advantages and disadvantages of integer ambiguity are simulated,compered and analyzed including the wide lane and narrow lane ambiguity algorithm,three-frequency ambiguity algorithm and LAMBDA.Choose suitable integer ambiguity resolution algorithm for the Beidou navigation system RTK positioning technology.Finally,a RTK positioning method on mobile target is proposed,which is used under the circumstance without based station or net based on the in-depth study of the RTK positioning model.The regular RTK positioning results is regarded as the true value,and the positioning performance of new RTK algorithm from the data sampling interval and delay time are analyzed.Compared two factors,the sampling intervals have a greater impact on the positioning accuracy of the new RTK positioning algorithm.Compared with the pseudo-range single point positioning method,which also uses one receiver,the new RTK algorithm has better positioning performance in the Beidou system.The RTK positioning accuracy of Beidou system is better than that of GPS.The RTK static and dynamic positioning availability of Beidou system could meet the needs of car navigation,vehicle positioning,static and measurement.