摘要
本文基于中国某地区密集均匀分布(2km×2km一点)的实测重力异常,统计了110km×120km范围内空间重力异常和地形高的局部协方差函数,并应用回归分析方法,以地形高的局部协方差函数,对重力异常的局部协方差函数实施逼近。统计结果表明,逼近公式(6)和(7)的逼近精度分别为±17.36(mgal) ̄2和±4.85(mgal) ̄2。
In this paper,the local covariance functions of free-air gravity anomalies and heights arestatisticly computed from the measured gravity anomalies and densely (one point per 2 × 2and uniformly distributed in a region of China,and local covariance function of gravityanomaly is approximated from local covariance function of height by method of regressionanalysis. The statistic results show that the precisions of empiric formulas(6)and (7)are re-spectively ±17. 36mgal and ±4.85mgal.
出处
《测绘学报》
EI
CSCD
北大核心
1995年第1期23-27,共5页
Acta Geodaetica et Cartographica Sinica
关键词
协方差
函数逼近
回归分析
重力测量
Covariance function,Approximation,Regression analysis