Astro::FITS::HdrTrans::JCMT_GSD_DB - JCMT GSD Database header translations
Converts information contained in JCMT heterodyne database headers to and from generic headers. See Astro::FITS::HdrTrans for a list of generic headers.
Returns true if the supplied headers can be handled by this class.
$cando = $class->can_translate( \%hdrs );
For this class, the method will return true if the "GSDFILE" header exists and the "SCA#" header exist.
These methods are more complicated than a simple mapping. We have to provide both from- and to-FITS conversions All these routines are methods and the to_ routines all take a reference to a hash and return the translated value (a many-to-one mapping) The from_ methods take a reference to a generic hash and return a translated hash (sometimes these are many-to-many)
INSTRUMENTgeneric header. For RxA3i, sets the value to RXA3. For RxB, sets the value to RXB3.
Calculate a unique Observation ID.
LONGDATEOBSheader into a YYYYMMDD integer.
Translates the DB date header into a
Translates the database date header into a
Time::Pieceobject and adds on the exposure time.
Uses the NORSECT (number of backend sections), NOFCHAN (number of frontend output channels) and NOBCHAN (number of channels) to form a string that is of the format 250MHzx2048. To obtain this, the bandwidth (250MHz in this example) is calculated as 125MHz * NORSECT / NOFCHAN. The number of channels is taken directly and not manipulated in any way.
If appropriate, the bandwidth may be given in GHz.
C12VDEFheaders into one combined header.
Brad Cavanagh <email@example.com>, Tim Jenness <firstname.lastname@example.org>
Copyright (C) 2008 Science and Technology Facilities Council. Copyright (C) 2003-2007 Particle Physics and Astronomy Research Council. All Rights Reserved.
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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