GPS单点定位因其体积小灵敏度高等优势在旅游、测绘等众多领域得到了广泛的应用，但测量精度低是其进一步推广的瓶颈。本文对GPS单点定位时，误差经过多长时间才会稳定在一个较小的范围内进行了研究。本次研究通过5天的实地测量获取数据，并对每组数据求最或然值和标准差，以此来处理数据。在对处理结果进行比较和分析后，得出随着观测时间的延长，GPS单点定位的测量值会变得更加精确，经15 min左右的时间，纬度坐标的精度稳定在一个较高的水平；经过 21 min左右的时间，经度坐标的精度稳定在一个较高的水平；经过 24 min左右的时间，海拔精度稳定在一个较高的水平。
关键词：静态绝对定位;GPS单点定位;手持GPS接收机;等精度观测值的最或然值
Analysis of GPS Single Point Positioning Accuracy
Abstract
GPS single point position has been widely used in tourism, mapping and many other fields for its advantages such as small size and high sensitivity, but the low accuracy is the limiting condition for its further promotion. This paper studies that how long it will take for the inaccuracy to be stabilized within a smaller range when GPS single point position is underway. In this study, the data is obtained through 5-day field survey, and to be processed by working out the average and RMS error of every set of numbers. According to the comparison and analysis of the results, GPS single point position will become more precise with the extension of observation time. After 15 min or so, the precision of latitude coordinate can be stabilized at a higher level. After 21 min or so, the precision of longitude coordinate can be stabilized at a higher level. After 24 min or so, the precision of altitude level can be stabilized at a higher level.
Key words: static absolute position;GPS single point position;hand-held GPS receiver;average of equal observations
目 录
第一章 引言 1
1.1研究的目的和意义 1
1.1.1研究的目的 1
1.1.2研究的意义 2
1.2国内外研究综述 3
1.2.1国外研究综述 3
1.2.2国内研究综述 3
1.3相关概念介绍 4
1.3.1单点定位 4
1.3.2手持式GPS及其应用领域 4
第二章 GPS定位基本原理 5
第三章 GPS单点定位的研究 10
第四章 结论 20
参考文献 21
谢 辞 22
附 录 23
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