Bernese ECOM光压模型在BDS卫星精密定轨中的应用 |
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引用本文: | 王琰,郭睿,张传定,胡小工,唐成盼,李冉,潘军洋.Bernese ECOM光压模型在BDS卫星精密定轨中的应用[J].武汉大学学报(信息科学版),2018,43(2):194-200. |
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作者姓名: | 王琰 郭睿 张传定 胡小工 唐成盼 李冉 潘军洋 |
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作者单位: | 1.信息工程大学地理空间信息学院, 河南 郑州, 450051 |
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基金项目: | 国家自然科学基金41374038国家自然科学基金41204022 |
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摘 要: | 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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关 键 词: | Bernese ECOM光压模型 相关性分析 显著性检验 BDS 精密定轨 |
收稿时间: | 2016-07-05 |
The Application of Bernese ECOM Slar Rdiation Pessure Model in BDS Pecise Orbit Dtermination |
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Affiliation: | 1.Institute of Geographic Space Information, Information Engineering University, Zhengzhou 450051, China2.Beijing Global Information Application and Development Center, Beijing 100094, China3.Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China |
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Abstract: | The Bernese ECOM solar radiation pressure model is widely used in precise orbit determination (POD) for GNSS navigation satellites1]. But when used for BeiDou POD, the accuracy may not be the best when all the nine parameters are solved. The MGEX precise ephemerides of one year were collected. A one-year time series of the nine parameters were analyzed by orbit fitting. The results show that there are strong correlations between Bc/Bs parameters and Yc/Ys parameters. At the same time, the Bc/Bs parameters have a one year cycle and are an order of magnitude larger than Yc/Ys parameters. Sgnificance testing of the ECOM regression model results show that the significance level of Bc/Bs parameters is higher than Yc/Ys parameters. Experinments on orbit determination using different schemes with data from MGEX monitoring stations were carried out. The results show that only the five parameters that D0/Y0/B0/Bc/Bs yielded the highest precision of orbit determination, thus the five parameter EOCM model is better for BeiDou POD. |
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