北京测绘2025，Vol.39Issue(7)：953-959,7.DOI:10.19580/j.cnki.1007-3000.2025.07.004
北斗/GNSS精密轨道天边界不连续性的平滑方法
Smoothing method for the discontinuity of precision orbits at the terminator boundary in BeiDou/GNSS
韩飞1
作者信息
- 1. 中煤天津设计工程有限责任公司,天津 300120
- 折叠
摘要
Abstract
Currently,precision orbit products provided by international global navigation satellite system(GNSS)service organizations generally exhibit sudden accuracy changes at the terminator boundary,leading to jumps in the low Earth orbit(LEO)satellites'orbits near the terminator.This results in a degradation of accuracy.To address this issue,this paper proposed a time-weighted and equal-weight correction method for the precision orbit products of the BeiDou satellite navigation system(BDS)/GNSS satellites at the terminator boundary,and synchronously adjusts the orbit variations to the clock bias products to ensure consistency.The accuracy of precise orbit determination(POD)for low Earth orbit satellites near the terminator boundary was used to analyze and evaluate this correction method.Experimental results show that the discontinuity of the LEO satellite orbit is correlated with the discontinuity of the BDS/GNSS precision orbit products at the terminator boundary.The proposed correction method effectively improves positioning accuracy near the terminator and reduces LEO satellite orbit determination errors.After correction,the average maximum improvement in the accuracy of simplified dynamics LEO precision orbits and kinematic LEO precision orbits is 9.4%and 20.5%,respectively.关键词
精密星历/日边界轨道不连续性/精密单点定位(PPP)/低轨卫星精密定轨/全球导航卫星系统(GNSS)Key words
precision ephemeris/terminator orbit discontinuity/precise point positioning(PPP)/low earth orbit satellite precision orbit determination/global navigation satellite system(GNSS)分类
天文与地球科学引用本文复制引用
韩飞..北斗/GNSS精密轨道天边界不连续性的平滑方法[J].北京测绘,2025,39(7):953-959,7.
