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- 2018
Bernese ECOM光压模型在BDS卫星精密定轨中的应用
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Abstract:
Bernese ECOM光压模型是目前GNSS导航卫星精密定轨中应用最多的经验型光压模型[1]，但是其应用到北斗导航卫星（BeiDou Navigation Satellite System，BDS）精密定轨中，不一定9个参数全部解算定轨效果最佳。收集了MGEX一年的BDS精密星历，采用几何轨道平滑的方式反演出ECOM模型的9个光压参数，研究参数周年变化规律发现Bc、Bs参数与Yc、Ys相关性较强，Bc、Bs存在明显的周年特性而且量级较Yc、Ys大。通过ECOM回归模型整体显著性检验，确定出Bc、Bs的显著性水平明显高于Yc、Ys。最后通过MGEX监测站的实测数据定轨，轨道和钟差精度评估结果表明，只解算D0、Y0、B0、Bc、Bs 5个参数BDS定轨精度最高，建议BDS定轨中使用5参数ECOM光压模型
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