2D Kirchhoff migration for receiver function
接收函数的克希霍夫２D偏移方法

We extend seismic reflection Kirchhoff migration to receiver function study, to adapt to lateral velocity variation and improve the precision and resolution of receiver function migration. The model experiment shows that Kirchhoff migration can implement effective image of converted phases, remove the fictious image, in contrast to ray-based horizontal common-converted-point stacking method. We note that imaging dipping or curving interface is controlled by teleseismic azimuth, and receiver functions from different direction should be jointed to better resolve those complicated structures.