GPS单点定位误差分析

研究了在进行GPS静态绝对定位时，误差经过多长时间会稳定在一个较小的范围内．在研究过程中，先是使用手持GPS接收机分4天对某一特征点采取静态绝对定位的方法来获取实验数据，每天的定位时间为1h，都是从上午10：00到11：00，每隔1min，记录一次观测值．4天一共获得4组特征点的坐标．然后通过对每组坐标值求均值和标准差的方法处理数据．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．观测值会变得更加精确．经过20min左右的时间，经度坐标的误差会稳定在一个较小的范围内；经过27min左右的时间．纬度坐标的误差会稳定在一个较小的范围内．

Analysis to the Error of GPS Location of Single Site

This paper studies how long the error will be stable in a small range on GPS static absolute positioning.The method that using a portable GPS receiver to locate single site statically in four days is applied in the paper.In every day the time for location is from 10:00 a.m.to 11:00 a.m.and the observation value is recorded one time every minute.Totally four groups of values of coordinate of the point located are got in four days.Then through seeking the average and standard deviation of every group of values of coordinate and analysis to the result this paper gets a conclusion that the observation values become more precise with the increase of the observation time.After 20 minutes the error of longitude will be stable in a small range and after 27 minutes the error of latitude will be stable in a small range.