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Post by tmcewan on Jun 26, 2009 2:15:31 GMT
A frustrating night with variable patchy cloud covering what was another good NLC. The following image shows about the best view I had...  |
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Post by markt on Jun 26, 2009 6:24:29 GMT
Nice shot Tom. I looked & looked last night, staying up far beyong my bedtime for a work night, but apart from earlier in the evening when I detected a featureless whitish brightening of the twilight arch through the troposheric durge, it's as close as I got... Nevermind, this 'good; weather we're having at the moment in the UK is set to continue a while longer, so our window of observation extends with it. Fingers crossed we see some more  |
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Post by dgrutherford on Jun 26, 2009 7:44:50 GMT
Once again you guys further south experienced more structure than up here. Starting appearing at 2245Z spreading rapidly from the north - distinct N-S movement. By 2330Z almost overhead and by 2355Z well south of the overhead (135 Deg).However fairly bland structure - mostly 1 and 2b with only isolated patches of 3b waves. I seem to remember in the dim and distant past the Met Office used something called a Nephoscope to measure wind speed at height. You time the movement of cloud elements between two fixed points and somehow managed to calculate the movement although you needed to know the actual cloud height. Must try and find out how to do it as the N-S movement was quite marked.
Anyway great stuff.
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Post by Deepsky on Jun 26, 2009 8:14:57 GMT
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Post by Deepsky on Jun 26, 2009 10:03:37 GMT
Thank You Dear Pixaerial!
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hcp
New Member
Posts: 2
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Post by hcp on Jun 26, 2009 15:39:08 GMT
I observed this one by chance from Dunbar, having woken up at 3am (BST).  I am archiving the pictures from the School of GeoSciences webcam www.geos.ed.ac.uk/abs/Weathercam/latest.html at the official 15-minute intervals. It didn't see anything last night due to fog and low cloud --- I must have been lucky in Dunbar. A broken power supply has meant that the webcam didn't see any NLC earlier in the season either. |
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Post by markt on Jun 27, 2009 7:47:50 GMT
Great captures, all of you - thanks for sharing! The coverage we're getting this year is phenomenal! @ John - I really like the 'rangefinder' map you've been doing based on Bills calculations.  |
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