Seeing sky Quality

[algwat]

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

[vaztr]

The link works better without the full stop

http://realtime2.bsch.au.com/wv_sat.html

:P

Checking it out now

VAZ

[vaztr]

Certainly looks do'able as you have suggested - in a similar vein to SkippySky

Only problem I have with it is the huge amount of cloud and water vapour over ME at the moment :sadeyes:

VAZ

[algwat]

thanks for removing the '.'

Yes, a bit like skippy sky, only with numbers.
It won't make your seeing any better, just now you have a number for your frustration level ...8)

kind regards, Alan

[Joshua Bunn]

Thanks Alan, I always find these sites of interest

[vaztr]

Not my thanx to take Joshua

All Alan's doing:thumbsup:

VAZ

[Joshua Bunn]

woops, Ive fixed my mistake now :)

[speach]

Seems more comprehensive than Skippy

[algwat]

I still like what Skippy Sky does. This site just shows the real images.
I would be interesting to see if the numbers along with a standard set of images, say 10sec,20sec,30sec...60sec, work out to calculated SQ measurea using the formula's.

kind regards, Alan