On Fri 2004-10-22T11:42:59 -0700, Steve Allen hath writ:
The tricky part here is that this begins to tread on the grounds of a
supposed subsequent WCS paper (WCS Paper V?) which seems likely to
have a title something like "Representations of temporal coordinates
in FITS".

The other tricky part is what would DATE-AVG look like in
table 13 of WCS Paper III.

MJD-AVG becomes MJDAna

DATE-AVG would be ?

DATAna is mnemonically confusing

DTAVna to be read "date/time average" is better
but loses contact with the "DATExxxx" tradition
already in the standard.

Note that the "n" corresponds to column number and the "a" is there
for the sake of the supposed WCS Paper V so as to permit different
time scales (or even different relativistic reference frames) to be
used for different versions of the WCS.

--
Steve Allen UCO/Lick Observatory Santa Cruz, CA 95064
Voice: +1 831 459 3046 http://www.ucolick.org/~sla
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