extrapolation operator

基本解释

We improved FFD extrapolation operator to compensate the amplitude difference generated by geometry diffusion loss.
通过改进傅立叶有限差分的延拓算子，补偿了几何扩散损失引起的振幅误差。
Starting from the decomposition of wave equation extrapolation operator in 3-D non-uniform medium, the paper gained one-way wave-equation used for true amplitude migration;
本文从三维不均匀介质中的波动方程外推算子分解出发，得到了用于真振幅偏移的单程波方程；
Af-x Explicit migration is carried out through spatial convolution of finite-length extrapolation operator with frequency slice, which is concise, high efficient, and easy to extend from 2D to 3D.
频率空间域显式偏移利用有限长度的褶积算子，通过对不同的频率进行空间褶积来实现偏移成像，且具有简洁、高效、便于扩展等特点。