文档介绍：毕业设计(论文)
设计题目:GPS控制网的优化设计研究
摘要
GPS定位在测量中有很大的应用潜力。近年来,GPS 接收机的小型化、小功耗给其应用于测量提供了有利的条件。在软件方面,GPS 的基线解算、平差也有了很大的发展,这些都促使GPS 在测量中得到了较为广泛的应用。而且随着GPS 定位技术的发展,卫星数的增多更新,目前所用GPS接收机的实际相对定位精度及其稳定性较高,许多厂家生产的GPS 接收机( 如leicaNGSS1200,Trimble 4700等) 可达到B 级以上的定位精度。因此,研究用GPS 布设短基线控制网的精度和缩短观测时段长度的可行性, 有其重要意义。本论文所要研究的内容就是在现有GPS条件下,通过布设短基线控制网,对不同观测方式及不同外界条件下GPS定位结果进行分析,检核GPS所能达到的精度,及对外界条件因素的依赖程度,总结影响精度的原因及解决方法,为实际的生产和研究提供参考依据.
关键词:GPS,基线解算,定位精度,相位中心
Abstract
GPS positioning measurements have great potential. In recent years, GPS receivers of small size, small power consumption to applied to provide favorable conditions for measurement. In terms of software, GPS's baseline, the adjustment has also been greatly developed, which prompted the measurement of GPS has been more widely used. And with GPS positioning technology, satellite increased the number of updates. Currently used in the actual GPS receiver positioning accuracy and stability of the relative high number of manufacturers of GPS receivers (such as leicaNGSS1200, Trimble 4700, etc.) can reach more than B-level positioning accuracy. Therefore, the study laid a short baseline using GPS work of the accuracy and feasibility of shortening the length of observation period, has its significance. This paper will study the content is available GPS conditions, short baseline work through the layout of different observation methods and different external conditions, the results of GPS positioning, check the accuracy of GPS can achieve, and factors on the external conditions dependence, summing up the reasons affecting the accuracy and solution. For the actual production and research references.
Key words: GPS, baseline, positioning accuracy, the phase center changes
目录
摘要 1
Abstract II
1 GPS 简介 1
GPS的定义 1
GPS的系统组成 1
GPS 测量的特点 2
2 GPS定位原理 4
GPS的基本定位原理 4
GPS定位的基本观测量 4
3 影响GPS 测量精度的误差 7
GPS卫星自身误差 7
与信号传播有关的误差 8
与接收机有关的误差 11
4 实验内容 13
研究内容 13
14
观测 15
5 实验数据分析及结论 17