gps事后相位差分解算数据处理中相关问题研究-载运工具运用工程专业毕业论文.docx

Abstract
GPS(Global Positioning System)cagier phase observable is the most accurate observation obtained from the the technique of relative positioning by GPS cartier phase develops,the positioning method using GPS carrier phase is used broadly such as project reconnaissance and land example,GPS RTK mode can be used to layout the middle stakes of highway in real time and to survey the plane position in hydrographic mode can also be applied to boundary mark and plot surveying in land inventory.
The key of relative positioning by GPS cartier phase is the data processing,in which the data format
exchange、the base—line resolution and the integer ambiguity resolution are three very important pans.
First,the data format exchange is GPS data received from GPS receiver and RINEX are analyzed is also a detailed introduce aiming to how to achieve the format exchange from CMC data generated by GPS receiver to RINEX data.
The double differential carrier phase observation equation has been researched systematically,and a new method called“the definite weigh method of high angle”is the data of surveyed in a large·scale water-power station to analysis affection of base-line coordinate result accuracy by three definite weigh methods, the data result indicated clearly that“the definite weigh method of high angle”can raise precision of base—line coordinate resolution result effectively.
The LAMBDA algorithm is more effective than any other algorithm for ambiguity is analyzed in the the basis of the analysis of two important parts:integer transform and LAMBDA search, the improved LAMBDA algorithm is presented,which aim to enhance the efficiency of ambiguity resolution. Verified by a lot of actual data,the improved LAMBDA algorithm is considered effective.
Key word:GPS post phase difference,base-line resolution,LAMBDA,FARA,FASE integer ambiguity,
land resources investigation