IGS精密卫星轨道精度分析

Precision analysis of IGS satellite orbit

本文介绍了几种不同的IGS产品形式,对其轨道产品进行了精度分析,重点研究了IGS最终精密轨道信息的精度。分别通过SP3文件中给出的精度码AccCode和summary文件中计算出的LongArc值,研究了最终精密卫星轨道值的精度,结果表明AccCode值灵敏性较差,LongArc值稳定性较差。本文采用考察连续两天精密卫星坐标的连续性(PD值)来确定精密卫星轨道的精度,并证明了这种方法的可行性及稳定性。

This paper introduces several different IGS orbit products, and takes precision analysis of individual orbit products especially its ultimate orbit products. By the AecCode value given in SP3 and the LongArc value given in summary, we studied the precision of ultimate satellite orbit products. The result shows that the sensitivity of AccCode value is poor and so is the stability of LongArc value. This paper adopts the method based on the continuity （PD） of two consecutive days＇ satellite coordinates to determine the accuracy of ultimate satellite orbit products, and proves the feasibility and stability of this method.