[fitsbits] FIT Keyword data dictionaries

[Tom Kuiper]

> Date: Thu, 02 Nov 2000 11:43:47 +0000
> To: fitsbits at cv.nrao.edu
> From: Peter Bunclark <psb at ast.cam.ac.uk>
> Organization: Institute of Astronomy
> Newsgroups: sci.astro.fits
...
I concur that the units should be decimal degrees.

I prefer an earlier suggestion by Steve Allen that the keyword be more specific
as to the type of longitude and latitude:
SITEGLON
SITEGLAT
SITEALON
SITEALAT
This would require a revision of the Single Dish Format shared keywords, but
since that isn't yet a published standard, it should not be too late.
I would also propose for the SDF keywords
ECLIPLAT
ECLIPLON
for people who study solar system objects.

Regards

Tom
> Doug Mink wrote:
> 
> > Standard keywords describing the observatory geographical position would be
> > quite useful.  For example, we use
> >
> > SITENAME= 'flwo2   '
> > SITELONG= '+110:52:39.0'       /LONGITUDE, DEGREES WEST OF ZERO
> > SITELAT = '+31:40:51.4'        /LATITUDE, DEGREES
> > SITEELEV=               2320.0 /ELEVATION, METERS
> >
> 
> The FITS standard states angles should be in degrees!
> 
> The  UK's ING telescope have use the following for some years:
> LATITUDE=            28.762000 / Telescope latitude  (degrees), +28:45:43.2
> LONGITUD=            17.877639 / Telescope longitude (degrees), +17:52:39.5
> HEIGHT  =                 2348 / [m] Height above sea level.
> SLATEL  = 'LPO2.5  '           / Telescope name known to SLALIB
> TELESCOP= 'INT     '           / 2.5m Isaac Newton Telescope
> 
> It is implied that the coordinates refer to the intersection
> of the axes of the telescope producing the data frame.
> 
> Peter.
> 


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