Nice, Rob. That's now three of us who have recorded the brightening of the blue end of the spectrum.
I have had the opposite experience to you - this is the first spectrum I stayed up for, as opposed to setting the 3am alarm (which my wife has attempted to veto). A bit less detail because airmass was about 2.2 when I took this.
Still, more civilised :-)
Oops, just realised the title on the image is wrong. It's 12/1/2013 13:30
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