摘要
根据球冠谐系数与点质量模型的关系,提出一种基于多层点质量模型分层构造球冠谐系数的方法。以32°N^34°N,102°E^104°E为计算区域,利用EGM2008模型和实测观测值构造三层球冠谐模型系数,逼近该区域的重力异常场。结果表明,使用本方法构造的球冠谐模型和实测观测值的误差平均值小于0.5×10-5ms-2,当拟合区域的球冠半角为0.71°时,模型的内符合精度为±4.65×10-5ms-2。
According to the relationship between the spherical cap function and the point mass model,a model was proposed based on muhilayer point mass model structure coefficient of spherical cap harmonic method. Taking a region （32°N-34°N, 102°E-104°E）as tile calculating area,the Gravity anonmly was calculated using the three lay- ers spherical cap harmonic coefficient which constructed by EGM2008 model and tile Gravity measured of servations. Analysis of fitting precision of gravitational field under dill）rent spherical cap harmonic order indicates that the average error between the spherical cap harmonic model and the measured observations is less than 0.5×10° ms-2, and internal consistency accuracy of the model is 4.56 × 10-5 ms -2 when Spherical cap half angle is 0.71°.
出处
《大地测量与地球动力学》
CSCD
北大核心
2014年第5期30-34,39,共6页
Journal of Geodesy and Geodynamics
基金
海洋公益性项目(201305029-02)
