Re: Sky Clarity

[John Phillips <john.d.phillips@insightbb.com>]

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