
                             eltpsffit
--------------------------------------------------------------------------

This is the README file for version 1.1 of eltpsffit by J. Liske,
jliske@eso.org.

Release date:  05/05/2009

eltpsffit is a program to fit 2D images of point spread functions
(PSFs) with a combination of various analytical functions. Although in
principle any PSF image can be fit, eltpsffit was designed to fit the
PSFs produced by OCTOPUS, ESO's numerical end-to-end PSF simulation
tool. In particular, eltpsffit is capable of fitting the high-Strehl
PSFs produced by adaptive optics systems. The purpose of fitting PSF
images is (i) to obtain a more manageable representation of a PSF
(tens of parameters vs 4kx4k pixel) and (ii) to eliminate speckle
noise that is often present in the simulated PSF images due to the
short timescale covered by the simulations.


INSTALLATION
------------
For instructions on how to install eltpsffit and indeed for any other
questions please see the WWW pages at
http://www.eso.org/sci/facilities/eelt/science/drm/tech_data/ao/psf_fitting/


DISCLAIMER
----------
Copyright (C) 2009 by Jochen Liske, jliske@eso.org

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or (at
your option) any later version.

This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.


HISTORY AND CHANGES
-------------------
05/05/09
- Release of version 1.1.

05/05/09
- Fixed bug that wouldn't allow eltpsffit to compile without the PGPLOT hack.
- A few internal changes of file names etc.

12/04/09
- Release of version 1.0.

