NAME

Astro::FITS::HdrTrans::CGS4New - UKIRT CGS4 translations for "new" style CGS4 headers.

SYNOPSIS

  use Astro::FITS::HdrTrans::CGS4New;

  %gen = Astro::FITS::HdrTrans::CGS4New->translate_from_FITS( %hdr );

DESCRIPTION

This class provides a generic set of translations that are specific to the CGS4 spectrometer of the United Kingdom Infrared Telescope.

METHODS

can_translate

Returns true if the supplied headers can be handled by this class.

  $cando = $class->can_translate( \%hdrs );

This method returns tru if the INSTRUME header exists and is equal to 'CGS4', and if the DHSVER header exists and is equal to 'UKDHS 2008 Dec. 1'.

COMPLEX CONVERSIONS

to_ROTATION

This determines the angle, in decimal degrees, of the rotation of the sky component of the WCS. It uses the standard transformation matrix PCi_j as defined in the FITS WCS Standard. In the absence of a PCi_j matrix, it looks for the CROTA2 keyword.

For CGS4 the PCi_j matrix is obtained from i=[2,3] and j=[2,3].

to_UTDATE

Sets the YYYYMMDD-style UTDATE generic header based on the DATE-OBS header.

REVISION

 $Id$

SEE ALSO

Astro::FITS::HdrTrans, Astro::FITS::HdrTrans::UKIRT.

AUTHOR

Malcolm J. Currie <mjc@star.rl.ac.uk> Brad Cavanagh <b.cavanagh@jach.hawaii.edu>, Tim Jenness <t.jenness@jach.hawaii.edu>.

COPYRIGHT

Copyright (C) 2008 Science and Technology Facilities Council. Copyright (C) 2003-2005 Particle Physics and Astronomy Research Council. All Rights Reserved.

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 2 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, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.