Re: satellite photo showing nightfall

[Stephen Murray <murray8@LLNL.GOV>]

I believe that it's an artificially-generated image, not an enhanced
satellite image (though generated from satellite data).  There is
absolutely no cloud cover anywhere, which I suppose is not
impossible, but seems highly unlikely.  Features on the ocean floor,
such as the mid-Atlantic ridge, are visible.  That would not be
possible in an optical image.  I don't know what kind of dynamic
range most satellite images possess, but generally city lights and
gas flares in the Sahara would require a much deeper exposure than
regions in daylight.

> Please have a look at this photo of nightfall over central Europe
> that was sent to a friend of mine by a former student who is now in
> Navy satellite imagery.  Can anyone tell me if this is a single image
> or one that was pieced together using a number of images and then
> visually enhanced?
>
> http://www.siu.edu/~cafs/download/Sunset.jpg


================================
Stephen D. Murray
Physicist, A Division
Lawrence Livermore National Laboratory
Email:  sdmurray@llnl.gov
Phone: (925) 423-9382
FAX:    (925) 423-0925
================================