 len
(subdirectory with all files)
 lencrt.h

SEP history file tracing the twopoint rays of the refracted
P wave and then rewriting the resulting travel times at
the given receivers into formatted file.
 lenmod.dat

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

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

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

Names and coordinates of the receivers.
 lenrpa.dat

Data controlling twopoint ray tracing to given receivers.
 lenbcrt.h

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

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

SEP history file tracing the rays of the
zerooffset boundaryvalue rays (exploding reflector).
 lenzrpa.dat

Data for the initial conditions for
rays corresponding to exploding reflector.
 lenimtt.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.
 lenicrt.dat

Input data for the CRT program.
 lenirpa.dat

Data controlling initialvalue ray tracing.
 lencone.h

Initialvalue 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 Bspline coefficients.
Adding source, receivers and rays into VRML or GOCAD
representation of the model with surfaces.
 lencsrc.dat

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

Data controlling initialvalue ray tracing  ray parameters.
 lencftt.dat

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

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

Input data file for the 'net.for' program
of package NET. The data file refers two files
'lennsrc.dat' and 'lennrec.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 firstarrival travel times
at the receivers (endpoints), and the firstarrival 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 forwardstar 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'.
 lennsrc.dat

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

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