【作者】 高旭光；

【导师】 高飞； 胡小华；

【作者基本信息】 合肥工业大学 ， 大地测量学与测量工程， 2009， 硕士

【摘要】 GPS动态精密单点定位以其作业简便,不依赖于其他基准站系统等优点,可广泛应用于精密导航定位、GIS数据采集、科学考察等领域,成为近年来一个研究热点。GPS精密单点定位是利用从IGS网站下载的精密星历和精密卫星钟差通过拉格朗日多项式进行内插处理和双频观测值,通过对双频观测值进行组合可以消除电离层延迟的影响,并利用组合模型对载波相观测值的周跳进行探测。利用Saastamoinen模型对对流层延迟进行改正。同时对地球自转影响、相对论效应等进行改正。通过组合观测值模型利用最小二乘估计法获得测站点在ITRF下高精度坐标。本文分析了常用的精密单点定位的数学模型,通过编写程序并利用观测数据进行实验分析。经计算证明,动态精密单点定位单历元解算可以获得优于1米的点位精度。更多还原

【Abstract】 Kinematic Precise Point Positioning(PPP) could be widely used in precise navigation and positioning, data collection for GIS, science investigation owing to its strongpoint of convenient operating and non base station. At present, PPP is one of focuses in GPS research.We interpolate the precise orbit and satellite clock errors which downloaded from IGS with Lagrange , and use the dual frequency carrier phase and pseudo-range observations. The combination of dual carrier phase can be used to eliminate the delay influence of ionosphere delay, and also be used to detect the cycle slip. In PPP, the delay of troposphere can be corrected with the Saastamoinen model. Besides, the influence of the earth rotation and relativity effect will affect the range and the satellite clock, also should be corrected. Build the PPP observation equation, then we could get the coordinate in ITRF by Least Square evaluation.In this paper, three model of PPP were analysed by programimg to manage the observe data. It is proved that, by single epoch solution, kinematic Precise Point Positioning can get the coordinate with less than one meter precision.更多还原