一种弧段快速更新法的精密定轨精度分析  

Accuracy analysis on precise orbit determination based on quick updating method of arc

作　　者：代桃高 李建文[1,2] 刘旭芳 赵静 景鑫[5] 

机构地区：[1]信息工程大学导航与空天目标工程学院 [2]北斗导航应用技术河南省协同创新中心 [3]91650部队 [4]成都信息工程大学 [5]61363部队

出　　处：《导航定位学报》2017年第3期28-32,共5页Journal of Navigation and Positioning

摘　　要：针对实时卫星精密定轨解算中卫星轨道精度易随预报弧段增长而降低的问题,提出一种基于非差模型并以24h为解算弧段的弧段快速更新方法来提高卫星轨道的更新频率,以达到准实时精密定轨效果。实验结果表明:当实测弧段以每2h滑动更新时,实测弧段轨道精度优于5cm;预报轨道对用户实时可用性延后4h;绝大多数卫星在预报第4个小时至第6个小时的合成1d轨道精度优于10cm,理论上可用于分米级导航定位。Aiming at the problem that the satellite orbit accuracy could be lower with the longer forcasting arc in the near real-time determination of precise satellite orbiting,the paper proposed a rapidly updating method that the observing arc of 24 hwas kept to improved the efficiency of updating the satellite orbit based on un-differenced model,in order to realize the near real-time determination of precise satellite orbiting.Experimental result showed that when the observing arc was sliding updated by every two hours,the accuracy of actual measured satellite orbit would be better than 5 cm;the real-time availability of forecasting satellite orbit would be delayed 4 hours;and the orbiting accuracy of compounded one day of most satellites would be better than 10 cm when forecasting at 4-6 hours,theoretically demonstrating the capability of dm-level navigation and positioning.

关 键 词：准实时 精密定轨 滑动窗口 非差法 预报弧段 国际全球连续监测评估系统 

分 类 号：P228[天文地球—大地测量学与测量工程]