GPS动态变形监测的单历元数据处理方法研究与软件实现-地图学与地理信息系统专业毕论文.docx

中南大学硕士学位论文 中南大学硕士学位论文 摘要 AB STRACT With the development of GPS(Global Positioning System)hardware and software technologies．GPS iS more and more used in dynamic deformation monoriting domain．Fixing the phase ambiguities rapidly is the first step and most important for both general RTK(Real Time Kinematic)and Network RTK technologies．Unfortunately,cycle slips occur frequently in the deformation monitoring environment，and results in frequent initialization or even wrong ambiguity resolution．It affects the reliability and stability of the deformation monitoring result very much． Single epoch ambiguity resolution Can avoid cycle slips and becomes a best way to resolve the ambiguity problem in deformation monitoring．A new single epoch ambiguity resolution algorithm for dynamic deformation monitoring was developed based on the former researches．The restrictions of max deformation size，main deformation directions and dual-freuency ambiguity relationship were used in this new algorithm．The errors such as strong multipath and diffraction results in failed single印ch ambiguity resolution，SO the stochastic modeles of GPS measurements were analyzed and used in the single epoch resolution method to improve success rate further．RecentlB the technology of GPS Network RTK Was made a large progress．It is a good idea tO use this technology for dynamic deformation monitoring．So the corresponding single epoch ambiguity algorithm for dynamic deformation monitoring using Network I汀K Was developed in this paper From the experiments using real GPS measurements，it shows that the new single epoch ambiguity resolution algorithm is very efficient and reliable，and the success rate iS more than 99％．The stochastic model based on C／No Can help to reduce the effects of some errors such as multipath，diffraction and residual tropospheric delay．The success rate of single e