len (subdirectory with all files)

len-crt.h

SEP history file tracing the two-point rays of the refracted P wave and then rewriting the resulting travel times at the given receivers into formatted file.

len-mod.dat

Input data for the MODEL subroutine package to specify the model with a lenticular inclusion.

len-crt.dat

Additional input data file for the CRT program, with the numerical parameters for the complete ray tracing.

len-src.dat

Additional input data file for the CRT program, specifying the position of the point source.

len-rec.dat

Names and coordinates of the receivers.

len-rpa.dat

Data controlling two-point ray tracing to given receivers.

lenb-crt.h

SEP history file tracing the rays of the plane P wave incident at the model bottom at 45 degrees.

lenb-rpa.dat

Data for the plane wave incident at the model bottom at 45 degrees.

lenz-crt.h

SEP history file tracing the rays of the zero-offset boundary-value rays (exploding reflector).

lenz-rpa.dat

Data for the initial conditions for rays corresponding to exploding reflector.

leni-mtt.h

History file running 'crt.for' to trace the rays of the refracted P wave, then running program MTT interpolating Multivalued Travel Times inside ray cells, program MGRD converting file with multivalued travel times into several files with singlevalued travel times, and program GRDPS plotting the numbers and values of the calculated travel times.

leni-crt.dat

Input data for the CRT program.

leni-rpa.dat

Data controlling initial-value ray tracing.

len-cone.h

Initial-value ray tracing of the cone of rays in the model followed by calculation of the derivatives of the travel times with respect to the model B-spline coefficients. Adding source, receivers and rays into VRML or GOCAD representation of the model with surfaces.

lenc-src.dat

Input data for the CRT program - source position and orientation of the central axis of the cone of the rays.

lenc-rpa.dat

Data controlling initial-value ray tracing - ray parameters.

lenc-ftt.dat

Simple FTT input file for program 'invtt.for'.

len-net.h

SEP history file for network ray tracing in model LEN with a lenticular inclusion.

len-net.dat

Input data file for the 'net.for' program of package NET. The data file refers two files 'lenn-src.dat' and 'lenn-rec.dat' of this package, and two output files 'vel.out' and 'icb.out' of the 'grid.for' program. The four referred files should be located in the current directory. Program 'net.for' should generate four output files 'rays.out', 'end.out', 'tt.out', and 'err.out', containing rays, the first-arrival travel times at the receivers (endpoints), and the first-arrival travel times and their estimated errors in the rectangular grid of points. The data correspond to the example described in Subsection 6.3 of Klimes and Kvasnicka (1994) with the exception of the number of gridpoints and maximum forward-star size. Whereas 120*80*60 gridpoints are used in the paper, only 60*40*30 gridpoints are considered within the demo data in order to comply with the array dimensions of the basic version of 'net.for'.

lenn-src.dat

Additional input data file for the 'net.for' program with the coordinates of a source point.

lenn-rec.dat

Additional input data file for the 'net.for' program with the coordinates of receiver points.