Fortran 77 package CRT version 5.10

General description

Compiling and linking programs of package CRT

Copy all files (or at least all *.for and *.inc files) of package FORMS into your working directory. All the files may also be extracted using pkunzip -d forms.zip or tar -xvf forms.tar
On a computer with a very small memory (less than 16 MB), you may need to decrease array dimension MRAM in the include file ram.inc.
It is also recommended to compile and link all programs of package FORMS according to the description in forms.htm.
Copy all files (or at least all *.for and *.inc files) of package MODEL into your working directory. All the files including subdirectories may also be extracted using pkunzip -d model.zip or tar -xvf model.tar
It is also recommended to compile and link all programs of package MODEL according to the description in model.htm.
Copy all files (or at least all *.for and *.inc files) of package CRT into your working directory. All the files including subdirectories may also be extracted using pkunzip -d crt.zip or tar -xvf crt.tar
If you wish to compile programs crtpts.for and green.for, you need also subroutine indexx.for of the Numerical Recipes and the corresponding licence. Refer to package NR.
Now you may compile and link following programs of package CRT:
- crt.for (you may wish to supplement simple informative graphical screen output)
- rpplot.for
- crt2d3d.for
- mtt.for
- mttgrd.for
- crt2p.for
- crtray.for
- crtpts.for
- green.for
- greenss.for
- ss.for
- sp.for
- inv1tt.for
All necessary subroutine files and include files are included by the Fortran 90 INCLUDE commands located at the end of above listed files containing main programs.
Under Unix, you may perform the above task by editing script f designed to compile and link a single file, and then running script fcrt. The scripts must be made executable.
Under MS-DOS, you may perform the above task by editing batch file f.bat designed to compile and link a single file, and then running batch file fcrt.bat.

Running programs of package CRT

Data from standard input *:: Main input data of each program are read from the standard input (denoted by * in the table below), and mostly consist of a single line containing filenames and at most few numerical parameters.
Description of input data for CRT: Complete Ray Tracing.
Description of input data for RPPLOT: Plotting ray parameters using the output files of CRT.
Description of input data for CRT2D3D: Transforming 2-D system of rays to 3-D system of rays to be processed by program MTT which presently works only in 3-D.
Description of input data for MTT: Calculation of Multivalued Travel Times on 3-D grids of points, using the output of CRT.
Description of input data for MTTGRD: Converting multivalued travel times produced by program MTT into several singlevalued grids separated according to different ray histories.
Description of input data for CRTRAY: Conversion of output rays from CRT to formatted files.
Description of input data for CRTPTS: Conversion of output points from CRT to formatted files.
Description of input data for GREEN: Program to convert the unformatted output of program CRT into a formatted file containing the ray-theory elastodynamic Green function.
Description of input data for GREENSS: Program to read a formatted file containing the ray-theory elastodynamic Green function and to generate ray-theory time-domain synthetic seismograms (without attenuation) or frequency-domain response functions (including causal Futterman's attenuation).
Description of input data for SS: Program to read or generate and filter the source time function. It may store the filtered source time function and its Hilbert transform in the GSE data exchange format, or read the frequency-domain response function and generate synthetic seismograms in the GSE data exchange format.
Description of input data for SP: Program to plot seismograms previously stored in the GSE data exchange format.
Description of input data for INV1TT: Program to evaluate the derivatives of the travel time with respect to the model coefficients.

Table of data files:

d a t a	*	m a i n	l o g	M O D E L	C R T _ R	C R T _ S	C R T _ I	C R T _ T	L I N	P T S	F T T	G R E E N	S O U R C E	R F	G S E	S E P	M G R D	D A T A	P S
CRT	in	in	out	in	out	out	out	out		in in
RPPLOT	in	in					in	in		in									out
MTT	in				in		in	in								in	out
CRT2P	in				in out	in out	in out
CRTRAY	in				in		in		out	in in
CRTPTS	in					in	in			in in out	out
GREEN	in					in	in			in in		out
GREENSS	in	in										in	in	out	in out
SS	in	in	out											in	out				out
SP	in	in								in					in				out
INV1TT	in	in	out	in						in	in							out

General descriptions of the data forms are available under the formal names of the data forms in the table header.
Information specific to individual programs is available under the active items 'in' and 'out' inside the table.
Input data files '*' are read from the standard input and are unique to each program '*.for'.
Input data files 'main' are unique to each program '*.for'. Their names often default to '*.dat' (with the exception of 'greenss.for').
Output log files 'log' are unique to each program '*.for' and their default names are often '*.out', where the program name stands for *.
'PS' are the output encapsulated PostScript files with figures, generated by means of calcops.for.

List of error messages

File list of package CRT

(A) Documentation:

crt.htm (this file)

crtdoc.htm (general documentation to CRT)

crterr.htm (list of error messages)

(B) Basic complete ray tracing program and subroutines:

(C) The following subroutine files may be used to modify the basic version of the complete ray tracing program by means of additional screen output routines: