GPS整周模糊求解理论分析与方法研究-大地测量学与测量工程专业毕业论文.docx

桂林工学院硕士学位论文Abstract 桂林工学院硕士学位论文 Abstract Precise GPS positioning using carrier phase is one of the hotspots in current geodetic appl ications．It involves many aspects of the theory， including combination of observation，method of parameter estimation and ambiguity resolution used，stochastic models of the observation，influence of the observation errors and SO on．The most pivotal problem is how to search for the integer ambiguities in an accurate and quick way． The part of ambiguity resolution and validation is emphatically discussed in this thesiS，and some new proposals for the key questions are also presented．The main contents and conclusions of this paper are 1isted as f01lows： (1)Principles of ambiguity resolution in common use are analyzed in this article，including Classical eoeffieients Algorithm，Dual Band P—code Pseudo range Algori thm， Fast Ambiguity Resolution Approach(FARA)， Ambiguity Function Method，Least Squares Search Algorithm，ambiguity covariance method and SO on．And the advantages，disadVantages and scope of applications are summed up．At the mean time，the ambiguity resolution in its region is mainly discussed；the processing steps of the approaches are summarized；and some important issues which we should pay special attention to when solving thiS kind of problems are introduced． 钽)Ambiguity resolutions used in scientific software are introduced； the contrasts in features and functions of the scientific software and commerc ial software are 1 i sted and anal yzed。 (3)A new kind of approac呐earching in groups is brought forward， which is based on the LAMBDA method and independence ambiguity．After the completion of parameter estimation，the ambiguities are put into two groups according to the size of the floats’variance．Using this method can reduce the influence caused by the low precision floats and minish the searching space efficiently and increase the searching speed and success rate． (4)Searching outcomes’comparison 1a啊卜-a new checkout method，which is ba