Re: Sky Clarity

[Tom Droege <tdroege2@earthlink.net>]

If you read the stuff about the "Clear Sky Clock" you will see that it is 
only good to three hours.  I am thinking in terms of where the telescope is 
pointing right the minute of the exposure.  I want things that correlates 
with what the particular image is seeing.  So I am working on a simple 
directional detector.  Plus processing the images themselves.

Tom Droege

At 04:55 PM 2/1/03 -0700, you wrote:

>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
> >
> >
> >