All extrapolation operators face the problem of choosing the reference velocity due to continuation in depth.

此类波场外推算子沿深度层进行波场外推，都存在参考速度选择问题。

youdao

All extrapolation operators face the problem of choosing the reference velocity due to continuation in depth.

此类波场外推算子沿深度层进行波场外推，都存在参考速度选择问题。

youdao