抗差方差分量估计在GPS/GLONASS组合导航中的应用  

Applications of Robust Variance Component Estimation in GPS/GLONASS Integrated Navigation

作　　者：张勇[1] 田林亚[1] 徐君民[2] 杨建中 产光杰 

机构地区：[1]河海大学地球科学与工程学院,江苏南京210098 [2]江苏省电力设计院,江苏南京211102 [3]沪宁城际铁路股份有限公司,江苏南京210042

出　　处：《测绘科学技术学报》2013年第2期132-135,共4页Journal of Geomatics Science and Technology

基　　金：铁道部科技研究开发计划项目(2012G009-C)

摘　　要：运用GPS/GLONASS组合导航时,由于卫星系统的测距精度不同,需要在组合解算中采用方差分量估计进行合理定权和平差计算。但是,当GPS和GLONASS观测值中含有粗差时,若采用最小二乘方差分量估计则无法抵抗粗差的影响,从而降低平差结果的精度和可靠性。为了提高GPS/GLONASS组合解算的抗差性,本文引入了基于IGGⅢ等价权函数的抗差估计方法,经过对GPS/GLONASS实测数据的计算和分析,证明这是一种可行的和有效的方法。When using the GPS/GLONASS combined navigation, the reasonable fixed weight and adjustment calcu- lation should be carried on in the combined solution by variance component estimation due to the different location precision of satellite system. However, it is unable to resist the influence of gross error by using the least squares estimation of variance components, if the GPS, GLONASS observations contain gross errors and it will reduce the accuracy and reliability of the adjustment results. The robust estimation inethod based on IGGⅢ equivalent weight function was introduced in this paper. Calculation and analysis of the measured data for GPS / GLONASS proved that this was a feasible and effective method.

关 键 词：GPS GLONASS组合导航 方差分量估计 粗差 抗差估计 IGGⅢ等价权函数 

分 类 号：P228[天文地球—大地测量学与测量工程]