[fitsbits] Proposed Changes to the FITS Standard

On Wed 2007/08/01 17:51:47 +0200, Thierry Forveille wrote
in a message to: Mark Calabretta
and copied to: William Pence , FITSBITS fitsbits
@nrao.edu

Depends on the context, and on what's meant by "no great accuracy": it's
1 m/s for 7 arcsec (worst case position on the sky), so for planet

In the context of the discussion on the bottom of p92, by position I
meant location on Earth, not direction towards the source. By "great
accuracy is not required" I meant accuracy better than a few metres!
On the Earth's surface 1m = 32mas, which ought to be good enough even
for planet hunters.

As Steve says, the subtext is that Paper III wasn't about to tackle
keywords for terrestrial reference frames - they typically agree to
within 0.1m.

Cheers, Mark