Thanks for the kind words shaynej, keruili, bezuidar, ajzimmerman. Much appreciated. I am sorry I didn't respond any sooner, but I hardly ever check up on this part of the forum, and usually am mostly a follower on other parts. :-)
@ajzimmerman:
It's hard to recollect the exact circumstances, as it's been over a year ago I took this shot. But, judging from the other photos of the flight, there were several cloud layers above and below us. And it looks like the sun was behind one of these cloud layers at the time of taking the shot. Anyway, when I look at the JPG that came from the camera (I have the camera on both RAW and JPG), it came out, somewhat, underexposed. Next to that, I think I have a tendency to post-process my images a little bit on the dark side. ;-)
This is what the JPG straight from the camera looked like:
https://farm8.staticflickr.com/7526/15679775163_6c92d0fdfb_b.jpg