【作者】 赵娟；

【导师】 徐爱功；

【作者基本信息】 辽宁工程技术大学 ， 大地测量学与测量工程， 2011， 硕士

【摘要】 GPS精密单点定位是利用IGS及其其他数据中心提供的卫星精密卫星星历和精密卫星钟差,以单台GPS接收机采集的非差相位数据作为主要观测值来进行单点定位计算,其精度可达分米级甚至厘米级。本文首先简要介绍了精密单点定位的发展现状和IGS的概述及其产品说明,分析了精密单点定位中获取实时高精度的卫星星历和钟差的重要性。另外介绍了IGS产品的格式说明、精密单点定位的主要误差源以及误差改正模型、GPS精密单点定位的原理等。论文的主要研究内容为:(1)精密星历的研究,详细介绍了两种插值方法和两种拟合方法的数学原理,通过在matlab上编程实现各种方法并对各种方法的结果进行比较,分析了各种算法的特点和优劣,得出这四种方法所插值的结果均能满足单点定位的要求,两种拟合方法在计算阶数相同时无论精度和坐标差都相同。(2)精密钟差的研究,通过在matlab上编程实现三种算法,对不同钟类型(铯、铷)卫星进行内插和拟合,分析了三种算法得出,对于存在很大抖动的卫星钟差,不适合用切比雪夫拟合法。更多还原

【Abstract】 GPS Precise Point Positioning (PPP) uses un-differenced phase observation along with IGS and other data center to provide precise orbit and the precise satellite clock ,for stand-along geodetic point positioning, Its precision can reach level even cm-level honour. This article is mainly has carried on the development status of Precise point positioning and carriage and product specifications of IGS, Analyzes the importance of the precise point positioning in get real-time high-precision satellite star calendar. In addition Introduces the IGS product format indicates, Precise Point Positioning the main error sources and error correction model, GPS the difference of Precise Point Positioning principle, etc. the primary coverage includes:(1) Precision star calendar research, Detailed introduces two kind of interpolation methods and two fitting methods, achieves various methods through matlab and comparees results of kinds of methods, Analyzes different algorithms’ characteristics and adventages and disadvantages, draw the four methods by interpolation results which can satisfy the single point positioning requirement, whatever precision and coordinate difference are the same of two fitting method in calculating the order number diam-eter.(2) Precision Clock Bia research,Through in matlab programming, realize three algorithms interpolation, fitting of two different atomic cloeks(Rb or Cs),and analyze three algorithms for that, the Features and merits of these algorithms.The results shows Chebyshev interpolation is the best.更多还原