重力场数学拟合模型解的影响因素探究Exploration of influence factors on solution of gravitational field mathematical fitting models
鹿荻,陈锴
摘要(Abstract):
为了提高地球重力场模型不适定方程求解的精度,该文采用谱分析方法从级数展开阶数、数据采样率及数据缺失量3个方面探索影响数学拟合效果的根本因素:从常用的三角级数及勒让德级数模型出发,引出重力场拟合模型球谐函数模型,观察在改变级数展开阶数、数据采样率及数据缺失量等情况下所对应设计矩阵谱结构的变化,并从微观上研究影响误差分配的有关因素及最小奇异值对误差的决定性作用,为探求重力场模型解不准的原因及实现更高精度的全球重力场模型的建立提供参考。
关键词(KeyWords): 不适定问题;地球重力场;球谐函数;谱结构;误差分配
基金项目(Foundation):
作者(Author): 鹿荻,陈锴
DOI: 10.16251/j.cnki.1009-2307.2016.03.006
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