GPS Integer Ambiguity Resolution Algorithm At Real-time And In The Application Of Dynamic Relative Positioning

With the rapid development of global satellite navigation and positioning system, the requirement of navigation and positioning accuracy is becoming more and more strict, how to improve the precision of satellite navigation and positioning has been becoming the hot issue in the research of navigation and positioning technology. So far, the highest accuracy of the GPS positioning method is based on the carrier phase measurements of precision positioning,which is very important in the air,navigation,the spacecraft rendezvous and docking and precision agriculture and so on.RTK positioning technology and the whole weeks real-time solution are the core of the precise relative positioning technology. This paper starts from the practical application of Double dynamic relative positioning and carries on a thorough research about the two key problems of precise relative positioning technology.First of all, this paper introduces two basic observation quantity, at the same time the observation model is deduced, then the linearization.Then introduces the basic principle of RTK technology, and points out the key issues of the RTK differential relative positioning, namely ambiguity real-time decoding of the whole week.At the same time of RTK positioning error system is analyzed.Secondly, it introduces the most common real-time calculating method of the whole week, and expounds three methods which is available for fuzzy degree of whole weeks real-time decoding: dual-frequency P code pseudo range method, least square adjustment related method(LAMBDA) and fuzzy degree determine method step by step(CAR).Through the simulation and performance analysis, summed up the positioning accuracy of the algorithms and the application characteristics, which gives reference to the calculating method of fuzzy degree selected at the following whole weeks.Finally, the comprehensive research contents above, this paper proposes a dynamic of dynamic GPS relative positioning technology and ambiguity and baseline calculating the comprehensive plan of the whole week, simulation by MATLAB software code, the simulation results show that the scheme preliminary satisfies the requirement of the positioning precision of the double under the dynamic environment.