# Earthworm Modules:
RayLoc_ew Overview

(last revised 6 June, 2006)
Rayloc_ew is an Earthworm Module to perform global relocation of earthquakes and travel time computation.
Rayloc_ew is an Earthworm-style wrapper around a Fortran program RayLoc, written by Ray Buland. The fortran from Ray is forward model using a Gauss-Newton iteration process fitting to the AK135 (Kennett, Engdahl, and Buland, 1995, GJR v122) update to the iasp91 earth model.
Rayloc_ew attaches itself to the input ring and monitors the ring buffer for the TYPE_LOC_GLOBAL messages.
Rayloc_ew reformats the input and calls the FORTRAN RayLoc processing machinery. The output of rayloc_ew
is a TYPE_RAYLOC message, which is written to the output ring.
The wrapper accepts TYPE_LOC_GLOBAL messages and outputs TYPE_RAYLOC as described above.
Rayloc_ew requires three model files (tau.table, ak135.hed, ak135.tbl). These files are parts of rayloc_ew distribution.
Module Index | rayloc_ew commands