A program to interpolate the travel time picks at uniformly or irregularly spaced seismogram locations
Files
Input file: tx.in is the output file (tx.out) generated by RAYINVR Input file: rec.in contains the irregularly spaced seismogram locations at which the travel times are to be interpolated; format is F10.3 if the same receiver locations are to be used for each shot, and format is the same as tx.in (see description under RAYINVR) if different receiver locations are required for each shot, the x-coordinates of the travel times being the seismogram locations. Output file: tx.out contains the interpolated travel times in the same format as tx.in For a uniform seismogram spacing, the minimum and maximum seismogram location and spacing (km) are input interactively. If a non-uniform spacing is required, the seismogram locations in the file rec.in are used. Note that if the file tx.in corresponding to a set of observed travel time picks is used for rec.in, a set of calculated travel times may be generated at the same station locations (and assigned the same associated pick uncertainty) as the observed data, as is needed when estimating a final model's spatial resolution using the technique described under VDIFF.