国防科技大学学报2012，Vol.34Issue(5)：63-67,136,6.
基于子协方差阵加权的三星时差定位数据综合
Data integration based on sub-covariance weighting for a three-satellite TDOA-based location system
摘要
Abstract
To integrate multiple location estimates obtained at different time instants by a three-satellite TDOA-based passive location system, a method based on sub-covariance weighting is proposed. Based on the outcomes of the location precision analysis of a single estimate, the algorithm yields an integrated estimate of the spatial location through a two-step process: firstly, by using the inverse of the sub-covariance as the weighting matrix, it estimated two of the three coordinates through weighted least square ( WLS) ; secondly, it calculated the last one coordinate by solving the WGS-84 ellipsoid model function of the earth. Simulations show that the proposed method, compared with the existing methods, can significantly increase the location precision,.关键词
被动定位/三星/时差/多次观测/加权方法/WGS-84模型Key words
passive location/three-satellite/TDOA/multiple observations/weighting method/WGS-84 model分类
航空航天引用本文复制引用
叶浩欢,柳征,姜文利..基于子协方差阵加权的三星时差定位数据综合[J].国防科技大学学报,2012,34(5):63-67,136,6.基金项目
国家自然科学基金资助项目(61002026) （61002026）
