摘要
电离层活跃时的周跳探测与修复是全球卫星导航系统(GNSS)数据预处理的难点,针对电离层活跃期内周跳难以正确探测和修复的问题,提出采用滑动窗口滤波预测电离层延迟变化量,进而对周跳探测组合进行电离层延迟校正,从而正确探测并固定周跳。首先以99%的成功探测率和1%的漏检率,筛选出最优的周跳探测组合,然后再对第三周跳探测组合进行电离层延迟校正。通过实验分析,所采用的方法能正确探测并固定所有的周跳。
The detection and repair of cycle slip in the active ionosphere is a difficult point in GNSS data preprocessing.For the problem that the cycle slip is difficult to detect and repair correctly during the active period of the ionosphere,the sliding window filter is used to predict the ionospheric delay variation and then the cycle slip.The detection combination performs ionospheric delay correction to properly detect and fix the cycle slip.This paper firstly uses the 99%successful detection rate and 1%miss detection rate to screen out the optimal cycle slip detection combination,and then the ionospheric delay correction for the third cycle slip detection combination.Through experimental analysis,the method can correctly detect and fix all cycle slips.
出处
《工业控制计算机》
2024年第3期110-112,共3页
Industrial Control Computer
关键词
滑动窗口滤波
周跳
电离层
探测与修复
GNSS
sliding window filtering
cycle slip
ionosphere
detection and repair
GNSS
