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
$inst = $class->this_instrument();
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 $
Malcolm J. Currie <firstname.lastname@example.org> Paul Hirst <email@example.com>, Tim Jenness <firstname.lastname@example.org>.
Copyright (C) 2008 Science and Technology Facilities Council Copyright (C) 1998-2005 Particle Physics and Astronomy Research Council. All Rights Reserved.
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