NAME

Astro::FITS::HdrTrans::NIRI - Gemini NIRI translations

SYNOPSIS

  use Astro::FITS::HdrTrans::NIRI;

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

DESCRIPTION

This class provides a generic set of translations that are specific to NIRI on the Gemini Observatory.

METHODS

this_instrument

The name of the instrument required to match (case insensitively) against the INSTRUME/INSTRUMENT keyword to allow this class to translate the specified headers. Called by the default can_translate method.

  $inst = $class->this_instrument();

Returns "NIRI".

COMPLEX CONVERSIONS

to_ROTATION

Converts a linear transformation CD matrix into a single rotation angle. This angle is measured counter-clockwise from the positive x-axis. It uses the SLALIB routine slaDcmpf obtain the rotation angle without assuming perpendicular axes.

This routine also copes with errors in the matrix that can generate angles +/-90 degrees instead of near 0 that they should be.

SEE ALSO

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

AUTHOR

Malcolm J. Currie <mjc@star.rl.ac.uk> Paul Hirst <p.hirst@jach.hawaii.edu>, Tim Jenness <t.jenness@jach.hawaii.edu>.

COPYRIGHT

Copyright (C) 2008 Science and Technology Facilities Council Copyright (C) 1998-2005 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.