by mba007 » Sat Jul 29, 2006 9:30 am
Just a note to say that, in hindsight, and having looked at the images, I'm slightly skeptical that these were NLC. They look nothing like the beautifully structured pictures in the July 2006 SAN magazine, nor like those posted on the spaceweather.com galleries.
However, there is a problem in that at 9:58pm (BST) the Sun was 8 degrees below the horizon, and at 10:58 was 14 degrees below. According to the magazine 'when the Sun reaches 6 degrees below the horizon it will no longer illuminate the lower clouds of the troposphere'. So if it ain't NLC, what is it? Maybe cirrus being illuminated by the light scattered around the atmosphere???
Any thoughts?
Martin