Positioning. Carrier Phase Measurements Solver Algorithm Research

As the most advanced navigation and positioning system in the world nowadays,GPS is used widely especially on martial aspects,satellite positioning technology is becoming a hot spot.In the war of navigation,usage of GPS has become essential for precise command control and the precision of attacks and armed force deployment and influence the means and effects of the war at its every phase.So research on the technology of the GPS positioning has become the urgent task.In this thesis, the problems in resolving position of GPS carrier phase measurement are studied and the improving algorithm is proposed and simulated. There are two purposes of my paper:one is searching for how to increase the accuracy of the pseudorange and the speed of solutions;the other is detect and compensate the cycle slip of GPS carrier in the period of navigation process.Firstly, the principle of GPS positioning, Integer Ambiguity and cycle slip is introduced concisely. And then new methods for increasing the accuracy of the pseudorange and the speed of solutions are presented. They are using recursive emendatory Gram-Schmidt method or recursive Householder transformation to solve which based on QR-factorization. Thirdly, introduce kinds of OTF methods. Fourthly, new methods for enhancing detection capability are presented. Firstly, using Kalman filter in the model of the 3rd order polynomial to pretreat the carrier phase, and then a parity vector test method is used to detect cycle slips. Finally, some conclusions are obtained, some new ideals are provided.