Tim Jenness
and 1 contributors


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


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

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


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



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".



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.


 $Id: SOFI.pm 14879 2008-02-13 21:51:31Z timj $


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


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


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.

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