VOEvent 1.1 new draft with STC elaboration

[Steve Allen]

On Thu 2006-05-11T12:03:47 -0400, Arnold Rots hath writ:
> But then there is Bill Thompson's FITS WCS paper on solar coordinate
> systems which, in general, tends to put the z axis along the
> observer-sun line (as opposed to the x axis in F&H).

I was too distracted to point it out during review, but it is my
concern that several of the Thompson FITS WCS may be uncertain at a
level corresponding to the horizontal parallax of the earth.
These sorts of nuances were not addressed in the paper.

This is of little consequence for identifying which active region
produced a flare.  It could become a big headache for anything
trying to reconcile the exact coordinates of a structure by
comparing multiwavelength observations originally charted in
more than one solar coordinate system.

> Or are we seeing here a bifurcation between solar and planetary types,

Alas, that would not be surprising.

--
Steve Allen                 <sla at ucolick.org>                WGS-84 (GPS)
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