[fitsbits] DATE-OBS versus TIME-OBS (fwd)

[Arnold Rots]

Let me add to that.
Chandra uses:
	DATE-OBS= '2002-01-22T00:40:05.407'
	DATE-END= '2002-01-22T05:23:14.286'

(HEASARC conventions)

  - Arnold

Forwarded message:
> 
> Chandra uses:
> 	DATE-OBS= '2002-01-22T00:40:05.407'
> 
>   - Arnold
> 
> William Thompson wrote:
> > 
> > 
> > I'd like to get some input from the FITS community about the proper use of the
> > DATE-OBS keyword.  In a proposal for the FITS header for an upcoming NASA
> > mission, the date and time were split up into two keywords, e.g.
> > 
> > 	DATE-OBS= '2002-01-22'
> > 	TIME-OBS= '00:40:05.407'
> > 
> > I, however, argue that more modern usage would combine these into a single
> > keyword, e.g.
> > 
> > 	DATE-OBS= '2002-01-22T00:40:05.407'
> > 
> > I'm told that the split format was chosen for backwards compatibility.  My own
> > opinion is that it is the software which should be made backwards compatible,
> > while the FITS file format should represent the most modern usage.
> > 
> > How are other groups handling this?
> > 
> > William Thompson
> > _______________________________________________
> > fitsbits mailing list
> > fitsbits at listmgr.cv.nrao.edu
> > http://listmgr.cv.nrao.edu/mailman/listinfo/fitsbits
> > 
> 
> --------------------------------------------------------------------------
> Arnold H. Rots                                Chandra X-ray Science Center
> Smithsonian Astrophysical Observatory                tel:  +1 617 496 7701
> 60 Garden Street, MS 81                              fax:  +1 617 495 7356
> Cambridge, MA 02138                             arots at head-cfa.harvard.edu
> USA                                     http://hea-www.harvard.edu/~arots/
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Arnold H. Rots                                Chandra X-ray Science Center
Smithsonian Astrophysical Observatory                tel:  +1 617 496 7701
60 Garden Street, MS 81                              fax:  +1 617 495 7356
Cambridge, MA 02138                             arots at head-cfa.harvard.edu
USA                                     http://hea-www.harvard.edu/~arots/
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