Introduction

A first task in processing our three-component crosshole dataset is to separate P and S wavetypes. Given the arrival direction of incident energy, one can rotate and combine the three components to produce P, SV, and SH wave sections.

We developed an automatic scheme to perform this separation. A window of data is rotated over all possible arrival directions and the direction that maximizes the power of a given wave type is chosen. The entire trace is then rotated according to this direction to produce P, SV, and SH traces.

Traces can be NMO corrected and stacked to produce an estimate of the wavelet for a particular event, which can be used in deconvolution.