Sorting and Merging to Common Receiver Component Gathers

What we would like to look at is not a multiplexed display of different components, but rather a gather of all one type of component. For P-waves, our first choice would be to gather all the down-hole vertical component data into a single file (trace #1 from all the files). For the SH-waves, we will want to gather all the down-hole T-component data (trace #3 from all the files). Included in the BSU distribution is a bash script, Merge, which produces some of these common component gathers. An alternative script is Merge-all (Appendix B) which generates all combinations of sum or difference on all components. In addition to gathering a component, the Merge script also computes wave field enhancements and wave shaping to remove source variations monitored by the reference phone. Begin by copying the Merge script into your “brot” directory which contains the brot*.seg files. NOTE: For vertical component sources (only one polarization) see script Merge2 (in the scripts directory and Appendix C). Merge2 is designed for 7 component recording (load cell on hammer is 7th signal). This script can also be modified for vertical impact sources without a load cell.