摘要
将传统直角坐标系中的滑动平均方法(包括圆周法与网格法)运用到球面重力异常分离中。模型实验及实际应用均表明,该方法优于直接截断重力场模型阶次分离异常的方法,能够更好地反映实际地质情况,不仅适用于全球区域也适用于局部区域。
The moving average methods, including circumferential method and grid method, are extrapolated to gravity anomaly separation from traditional Cartesian coordinate system to spherical coordinate system. The effect of gravity anomaly separation depends upon the selected window size of moving average. In practice, a reasonable window size is estimated by the priori knowledge and trial. In gravity anomaly separation, there is the false anomaly, which can be removed by iteration. Model testing and actual application show that this meth- od for gravity anomaly separation is better than truncation method between different degree of gravity field model to separate gravity anomaly, and the regional and residual gravity anomaly of the Earth have good coherence with actual geological tectonics. What＇s more, this method can be applied to global or local region.
出处
《武汉大学学报（信息科学版）》
EI
CSCD
北大核心
2012年第7期864-868,共5页
Geomatics and Information Science of Wuhan University
基金
国家科技部国际科技合作专项资助项目(2010DFA24580)
国家自然科学基金资助项目(40730317
40774060)
关键词
球冠
球坐标系
重力异常
异常分离
滑动平均
spherical cap
spherical coordinate system gravity anomaly anomaly separation moving average
