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精密单点定位中伪距观测值的选择

发表时间:2008-03-31  浏览量:1465  下载量:707
全部作者: 江卉,杨振
作者单位: 河海大学土木工程学院
摘 要: 本文研究了提高伪距观测值精度的三种方法,即:相位平滑伪距、Hatch滤波和卡尔曼滤波,并探讨了它们的异同。,并且将双频相位平滑伪距观测值、Hatch平滑值、卡尔曼滤波值与原始观测值进行了比较。在此基础上,利用自己编写的程序,分别用三种方法平滑后的伪距观测值进行单点定位计算,并与IGS跟踪站的已知坐标进行对比并且用图象表示出双频相位平滑伪距观测值、Hatch平滑值、卡尔曼滤波值在N、E、H方向的真误差随历元的变化趋势,得出结论:Hatch滤波法最稳定,精度最高,但其受到周跳的影响.。由此,在伪距平滑数据处理中,应以Hatch滤波为首选。
关 键 词: 大地测量学与测量工程二级学科名称;;精密单点定位;相位平滑伪距;Hatch滤波;卡尔曼滤波
Title: Selection of pseudo-range on GPS precise point positioning
Author: JIANG Hui, YANG Zhen
Organization: College of Civil Engineering, Hohai University
Abstract: Three methods of improving the precision of pseudorange and their contrasts are discussed firstly. The dual frequency phase-smoothed pseudorange observations, hatch smoothed values and kalman filter values are compared with raw observations. Based on this, the software of GPS point positioning is compiled by the author, and the accuracy of GPS dual frequency phase-smoothed pseudorange and its point positioning is researched. Comparison with the result calculated and IGS station, and make use of pictures of sending information of N、E、H direction error change in dual frequency phase-smoothed pseudorange observations and hatch smoothed values and Kkalman filter values . Conclusions are given in the end: hatch smoothed values is the best and the accuracy is the bese, but is influenced on error. .Therefore hatch smoothed values is selected firstly in use.some conclusions are given in the end. (补充相应英文译文)
Key words: geodesy and surveying;二级学科名英文译文; precise point positioning; carrier-smoothed code; Hatch-type filter; Kalman filter
发表期数: 2008年7月第6期
引用格式: 江卉,杨振. 精密单点定位中伪距观测值的选择[J]. 中国科技论文在线精品论文,2008,1(6):665-670.
 
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