常春涛,慕仁海,程鹏飞,成英燕

• 1:中国测绘科学研究院
• 2:北京房山人卫激光国家野外科学观测研究站

摘要(Abstract)：

太阳光压摄动是影响卫星定轨中重要的误差源,在GNSS导航卫星精密定轨过程中使用最为广泛的光压模型为ECOM模型。为了探究几种ECOM模型及其适用性,该文以超快速星历为起算轨道,分析对比经典ECOM-1模型与最新13参数ECOMC模型对GPS/BDS卫星轨道的影响。结果显示:相较于ECOM-1模型,ECOMC模型在GPS定轨中精度有所提升,特别体现在径向精度提升,单天与三天弧段在径向的解算精度分别提升了12.73%和24.74%;在BDS定轨中,采用ECOMC模型,部分GEO卫星在径向方向单天精度有12.38%的提升,而对于IGSO与MEO卫星二者精度差异不大;分析可得,由于星体结构不对称引起卫星在沿太阳-卫星方向作用的偶数阶短周期谐波扰动,引入卫星-太阳方向偶数阶项的参数估计可提升卫星径向精度。

关键词(KeyWords)： 光压模型;ECOM模型;精密定轨;GPS卫星;BDS卫星

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划项目（2016YB0501405）

作者(Author): 常春涛,慕仁海,程鹏飞,成英燕

DOI: 10.16251/j.cnki.1009-2307.2021.02.012

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