Bug#344284: RFP: gsac -- GSAC: SAC (Seismic Analisys Code) clone
Package: wnpp
Severity: wishlist
* Package name : gsac
Version : 3.30
Upstream Author : Robert B. Herrmann Name <rbh@eas.slu.edu>
* URL : http://mnw.eas.slu.edu/People/RBHerrmann/ComputerPrograms.html
* License :
Description : GSAC Generic Seismic Application Coding
(Include the long description here.)
SAC, the Seismic Analysis Code, was created by researchers at the Lawrence
Liver more National Laboratory in the early 1980's. Initially distributed
as a FORTRAN program with low level routines in C, SAC became widely used
by the earthquake research community. The current SAC2000 is written in C,
and is distributed as an execuable binary form for several common
platforms. SAC and SAC2000 actually permit more than simple manipulation of
seismic traces. The macro script language and signal processing features
make it a processing tool that has only recently been supplanted in
capabilites by commercial packages such at MATLAB, MATHCAD and Mathematica.
The other contribution of SAC was the definition of a seismic trace file.
The concept of this file is similar to that use in seismic exploration for
which the trace consists of a trace header and the binary trace itself.
Many programs have been written to use the SAC trace files. This was
encouraged in the original SAC distribution by ready access to a library of
input/output routines for the FORTRAN and C languages.
Unfortunately SAC/SAC2000 has become dated because of its monilithic
structure, the previously closed source distribution, and advances in
computer platforms. The signal processing capabilities have been
supplanted by MATLAB and Mathematica, the support of 24 bit color displays
under X11 is lacking, and the assumptions about the underlying X11 support
engine have become dated. With this in mind, we decided to write a program
to permit necessary seismic trace manipulation from scratch. Starting,
March 27, 2004, we created a functional GSAC by June 1, 2004 without much
effort. GSAC takes its name from the free gcc and g77 compilers used, with
the corresponding commitment to open sources. SAC is a group effort to
provide documented tools for manipulating seismic traces which happen to be
stored in a SAC file format. GSAC thus emphasizes waveform processing
rather than a specific implementation. Thus GSAC is meant to be all
inclusive which means that the concept will encompass different underlying
operating systems (UNIX, LINUX, MacOS-X, Windows), different hardware
architectures (IEEE bigendian and little-endian), and different development
environments (gcc/g77, MATLAB, Maple, etc).
The design goals of the GSAC project are simple: · Platform independent
seismic waveform calculator core routines, with front ends that permit
command line operation, especially within shell scripts.
-- System Information:
Debian Release: testing/unstable
APT prefers unstable
APT policy: (990, 'unstable')
Architecture: i386 (i686)
Shell: /bin/sh linked to /bin/bash
Kernel: Linux 2.6.14-1-k7
Locale: LANG=es_CL, LC_CTYPE=C (charmap=ANSI_X3.4-1968) (ignored: LC_ALL set to C)
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