A method for gravity anomaly separation in spherical coordinate system based on spherical cap moving average

作者：Du Jinsong^*; Chen Chao; Liang Qing; Zhang Yi

来源：Geomatics and Information Science of Wuhan University, 2012, 37(7): 864-868.

• Cartesian coordinate system
• Gravity anomalies
• Gravity field model
• Grid methods
• Local region
• Model testing
• Moving average method
• Moving averages
• Priori knowledge
• Residual gravity
• Spherical cap
• Spherical coordinate systems
• Truncation method
• Window Size

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 method 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.

• 出版日期2012