Re: Sky Clarity

["Robert Creager" <Robert_Creager@LogicalChaos.org>]

Hey Tom,

Another item to take a look at is:

http://cleardarksky.com/c/TASSHILcsp.txt

This would add some of the information you are looking for.  I was going 
to (at some point) grab this info, parse and include in the FITS headers 
for ROB (except from a different location of course).  I figured it would at 
least give an indication of the seeing conditions of the local site.

Later,
Rob

From:           	John Phillips <john.d.phillips@insightbb.com>
To:             	tass@listserv.wwa.com
Subject:        	Re: Sky Clarity
Date sent:      	Sat, 1 Feb 2003 17:49:29 -0500

> Perhaps one could automatically download the NOAA GOES visible, ir1,
> and ir2 images, and look at the pixel value for the local lattitude
> and longitude.  This would be a simple way to determine the clarity of
> the sky over a Mark IV camera at the time an image is taken.
> 
> On Saturday 01 February 2003 01:01 pm, Tom Droege wrote:
> > Arne and anyone else that wants to answer,
> >
> > I am working on a "Sky Clarity" detector.  The idea is to measure
> > the radiation loss to free space.  So far the device looks
> > promising.
> >
> > My idea is that for tass telescopes this might be a good way to
> > select the best photometric nights.  Big telescopes would probably
> > also want good "seeing", but I doubt that "seeing" makes much
> > difference for tass measurements.  What I hope to measure is how
> > much stuff is between the telescope and space.
> >
> > I would like to put this measure in the .fits header.
> >
> > Is there some "official" fits header term to use?
> >
> > Tom Droege
> 
> 
>