SAGA
is an inversion software package for ocean acoustic and atmospheric
electromagnetic
environments. It integrates state-of-the art propagation codes with
state-of-the art optimization and inversion codes.
Jumpstart SAGA
A detailed description for a new user to get acquainted with SAGA. The
documentation is the Users Guide available below.
Download Jumpstart SAGA (pdf) and
the accompanying examples (tar
file). (July 2006)
Download SAGA
gzipped tar file: saga.tgz
(October 2007)
SAGA Platforms
SAGA is now implemented in Fortran90. The binaries for Linux (RH 9)
and Mac Os X is now distributed with the code, no compilation should be
necessary. Version 5.3 has been compiled on Sun Solaris, Mac os X (xlf
fortran),
Linux (Intels ifort) and Dec Alpha.
I
use the Intel Fortran90 compiler on Linux (ifort). For non-commercial
use the
compiler can be downloaded free of charge from this web site:
www.intel.com/software/products/compilers/flin/noncom.htm
I have also good experience with the Portland Group Fortran (pfg)
compiler.
On Mac OS X I use IBM's xlf compiler.
Precompiled binaries
In order to use the precompiled binaries
put the following statements in your .login:
For linux
setenv SAGADIR ~/saga
source $SAGADIR/bin/linuxsaga_init
or for Mac OS X
setenv SAGADIR ~/saga
source $SAGADIR/bin/macsaga_init
SAGA Users Guide
P. Gerstoft, "SAGA
Users guide 5.4, an inversion software package," , October 2007.
this is an
updated version of "SAGA Users guide 2.0, an inversion software
package"; SACLANT Undersea Research Centre, SM--333, La Spezia, Italy
(1997)
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1-D (diagonal) and 2-D marginal posterior distributions for a
self-noise inversion using Gibbs sampling. For more details see the
papers by Battle et al, 2004.
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The word SAGA stems from Icelandic and simply means a
story. A saga
is usually understood a prosaic long story from the middle ages. It
tends to go
on forever. Scientifically it stands for Seismo-Acoustic inversion
using
Genetic Algorithms.
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Last Modified: October 2007