read.me

利用fortran写的实现2D射线追踪的源代码！运行于linux下！

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RAYINVR raytrace and inversion programs          March 5, 1996
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All programs in this package are written in Fortran 77 except 
one program in the pltlib directory for x-windows graphics 
which is written in C. The five main graphics programs, 
rayinvr, tramp, vmodel, pltsyn and rayplot, are contained 
in the directories of the same name. Inside each directory 
there is a makefile (for unix users) to make two versions of 
each program. The first is for users who have access to the 
commercial graphics package called Uniras. The second version, 
prefaced by the letter x (i.e., xrayinvr for rayinvr), is 
made using the command, for example, make xrayinvr, and is 
intended for users who have any sort of x-windows terminal 
or workstation. This version of each program will allow 
screen graphics and generation of black & white or colour
postscript files. To attach your own local graphics package, 
replace the subroutine calls inside the file pltlib.f 
in the directory pltlib that presently call 
Uniras subroutines. These are simple graphics calls 
(e.g., draw a straight line between points, plot a number or 
character string, erase the screen, etc.) and so there should 
be an equivalent of some sort with the local system. 
The only change necessary for each makefile should be the
pathway for the executables and the plot library directory. 

The directory pltlib contains the plot routines used by each of 
the five main programs for both the uniras and x-windows versions. 
There is a read.me file inside the pltlib directory explaining
how to obtain a postscript file using the x-windows versions.
The directory misc contains a number of simple utility programs
that perform useful tasks in conjunction with the five main 
programs. There is a read.me file in this directory to explain
the purpose of each program. The directory examples contains all
the necessary input files to run eight examples which are intended
to demonstrate all the important features of rayinvr, tramp, vmodel
and pltsyn. There is also a read.me file in this directory to explain
the examples further. The directory documentation contains two 
files which include the documentation for the programs rayinvr,
vmodel and rayplot and tramp and pltsyn, as well as a few other
programs contained in the misc directory.

To get started started I suggest you run at least a few of the examples
in the examples directory without changing any of the parameters to
start with so as to see what these particular input files and parameters
produce. Then, choose one or more of the examples that is most like
the application you intend to work on and in a series of steps (i.e., not 
changing everything at once) adjust the model and parameter files until 
they are as you require them. This should minimize the need to refer to 
the documentation, and in particular, eliminate the need to read
through it completely at the outset. I think this procedure should bring
you up to speed on using the programs as quickly as possible. Always run
the program vmodel after each iteration of an inversion to ensure the
model remains sensible, i.e., there are no boundaries crossing, or
very large gradients, etc.

There is a new version of dmplstsqr (called smoothlsqr) that uses smoothing 
regularization that was written by Nigel Bruguier at Bullard Laboratories,
Cambridge.
 
Please keep me informed occasionally on your your progress with 
these programs using e-mail. Also, if you have any questions, 
comments, suggestions, or criticisms, do not hesitate to contact me. 
Do not distribute the code to anyone outside your immediate group, 
but refer interested persons to me directly. None of the programs in
any form provided in this package are to be used by you, or transferred
to someone, for financial gain or used in a private company as part
of its business. 

A paper in Geophysical Journal International (v. 108, p. 16-34, 1992) 
describes the methodology and citing this would be appropriate. A paper 
in JGR (v. 99, p. 11687-11704, 1994) presents many new features of the 
programs (such as floating reflectors) as well as the practical aspects of 
modelling real data including amplitudes.

Please let me know if you take a copy of the rayinvr package. 
I like to keep track of where it has gone. Thank you.

Thanks.

Colin Zelt

Department of Geology & Geophysics, MS-126
Rice University
6100 Main Street
Houston, TX 77005-1892

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http://zephyr.rice.edu/department/faculty/zelt/rayinvr.html