大规模低轨星座多普勒定位算法
Doppler Positioning Performance of LEO Mega Constellation
张雨露 1李桢 1施闯 1景贵飞1
作者信息
- 1. 北京航空航天大学前沿科学技术创新研究院, 北京 100191;卫星导航与移动通信融合技术工业和信息化部重点实验室,北京 100191
- 折叠
摘要
基于典型的Starlink星座构型,对大规模低轨星座多普勒定位算法展开研究.实验结果表明,理想条件下低轨星座多普勒单点定位精度可以在3～6 m.为保证米级的定位精度,低轨卫星的位置精度和速度精度应为米级每秒或厘米级每秒.C频段信号受到的电离层误差若不做改正,将导致定位精度变差2 m左右.对流层误差将使得定位结果变差几十米.此外,使用轨道高度为550 km的低轨卫星的多普勒频移定位时,接收机的初值误差应小于300 km,否则部分历元将不能收敛到正确的接收机位置.
Abstract
This paper proposed a Doppler-only point-solution algorithm and analyzed the Doppler positioning performance based on the Starlink constellation.The Doppler positioning accuracy was about 3～6 m.To achieve the meter-level positioning accuracy,the satel-lite position and velocity errors should be within several meters and several centimeters per second,respectively.The ionospheric delay rates of C-band signal would cause about 2 m error in Doppler positioning.The positioning error would increase by dozens of meters if there were no corrections for the tropospheric errors.To ensure convergence in the LEO-based Doppler positioning,the initial receiver position error should be less than 300 km when the satellites orbit at an altitude of 550 km.
关键词
定位导航授时/低轨卫星互联网星座/多普勒定位/电离层误差/对流层误差Key words
positioning/navigation and timing/broadband LEO constellations/Doppler positioning/ionospheric delay rates/tropo-spheric delay rates引用本文复制引用
基金项目
国家自然科学基金资助项目(41931075)
国家自然科学基金资助项目(42204033)
中央高校基本科研业务费项目(YWF-23-JC-12)
出版年
2024
国家科技期刊平台
NSTL
万方数据