球谐分析方法对GRACE大气去混频模型计算的影响

发布时间：2018-02-17 00:02

本文关键词： 地球重力场 GRCAE 大气去混频模型球谐分析星间距离变率残差　出处：《大地测量与地球动力学》2017年04期 　论文类型：期刊论文

【摘要】：基于球谐分析的解析积分公式,导出5种适合于大气去混频模型计算的球谐分析公式。采用无误差和加入误差的模拟大气压数据,通过"闭环"过程分析了5种球谐分析方法的正确性和有效性。基于ERA-Interim表面大气压数据,采用5种球谐分析方法计算了5组大气去混频模型。通过星间距离变率残差和累计大地水准面误差比较可知,不同球谐分析方法可导致星间距离变率残差的差距最大达0.6nm/s。第一类Neumann方法精度最高,证明5种球谐分析方法对现有GRACE卫星重力恢复的影响可忽略;但对于未来采用激光测距的卫星重力任务,建议大气去混频模型计算采用第一类Neumann方法。
[Abstract]:Based on the analytical integral formula of spherical harmonic analysis, five kinds of spherical harmonic analysis formulas suitable for the calculation of atmospheric de-mixing model are derived. The simulated atmospheric pressure data with no errors and adding errors are used. The correctness and validity of five spherical harmonic analysis methods are analyzed by "closed loop" process. Based on ERA-Interim surface atmospheric pressure data, Five sets of atmospheric demixing models were calculated by using five spherical harmonic analysis methods. Different spherical harmonic analysis methods can result in the largest difference of the residual error of the distance between satellites up to 0.6 nm / s. The accuracy of the first Neumann method is the highest. It is proved that the influence of the five spherical harmonic analysis methods on the gravity recovery of the existing GRACE satellites can be neglected. However, for future satellite gravity missions using laser ranging, it is suggested that the first Neumann method should be used in the calculation of atmospheric de-mixing model.
【作者单位】：西南交通大学地球科学与环境工程学院;
【基金】：国家自然科学基金(41574018,41404018) 中央高校基本科研业务费专项(2682015CX010) 高等学校博士学科点专项基金(20120184120006)~~
【分类号】：P223

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