Gidday All,
I was thinking the other day about a very good evening of imaging. The sky as cool and clear and still. I could relate the event a very low density of water vapour and no clouds. How did I know that? Well, this site ,
http://realtime2.bsch.au.com/wv_sat.html.
has infrared, water vapour and visible sat images for all of Australia.
So, I thought these could be used to give an impartial measurement of seeing quality. Each image can saved as a b/w 8bit image. This gives grey scale pixel value of 0-255. So, you could measure the grey level above your location and have a measure something like,
visible/infrared/watervapour - 34/40/200
or just infrared/watervapour - 40/40
very good seeing would have low number, bad seeing(cloud, rain, high water vapour) has high numbers. Or an average for ten pixels around your location.
This could then be related impartially to your imaging/observing session.
It's not real time but a trend of good images and low seeing numbers should follow each other.
What do you think?
Kind regards, Alan Watson