Satellite integrity monitoring for satellite-based augmentation system:an improved covariance-based method  

作　　者：Shuaiyong Zheng Mengzhi Gao Zhigang Huang Xiaoqin Jin Kun Li 

机构地区：[1]School of Integrated Circuit Science and Engineering,Tianjin University of Technology,No.391 Bin Shui Xi Dao Road,Xiqing District,Tianjin 300384,China [2]School of Electronic and Information Engineering,Beihang University,No.37 Xueyuan Road,Haidian District,Beijing 100191,China [3]Tianjin Navigation Instrument Research Institute,No.268 No.1 Road,Ding Zi Gu Street,Hongqiao District,Tianjin 300131,China

出　　处：《Satellite Navigation》2022年第1期74-84,I0003,共12页卫星导航（英文）

基　　金：supported by the Research Startup Funds from Tianjin University of Technology under Grant 01002101.

摘　　要：Satellite integrity monitoring is vital to satellite-based augmentation systems,and can provide the confdence of the diferential corrections for each monitored satellite satisfying the stringent safety-of-life requirements.Satellite integrity information includes the user diferential range error and the clock-ephemeris covariance which are used to deduce integrity probability.However,the existing direct statistic methods sufer from a low integrity bounding percentage.To address this problem,we develop an improved covariance-based method to determine satellite integrity information and evaluate its performance in the range domain and position domain.Compared with the direct statistic method,the integrity bounding percentage is improved by 24.91%and the availability by 5.63%.Compared with the covariance-based method,the convergence rate for the user diferential range error is improved by 8.04%.The proposed method is useful for the satellite integrity monitoring of a satellite-based augmentation system.

关 键 词：Clock-ephemeris covariance matrix Groove model Satellite-based augmentation system Scale model User diferential range error 

分 类 号：TN96[电子电信—信号与信息处理]