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Post by digitalsky on Jul 1, 2008 12:47:51 GMT
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Post by neilbone on Jul 1, 2008 14:53:40 GMT
Checked for NLC from Apuldram (a few km north of Selsey) 30 June-July 01 at 2200 UT, and found none evident. I think the images from Selsey show cirrus, which was extensive (up to about 70 degrees elevation) and still illuminated by the twilight. Below this the sky was part-clear with dark tropospheric cloud, and no NLC apparent in binoculars in, say, the vicinity of Capella - always the acid test at this low latitude. Indeed, down here, in 20 years, I've never seen NLC extend higher than 30 degrees, and that only at the very beginning or end of the night. Sorry to fulfil my usual role as curmudgeon (I await the flak), but I think this one's a false-positive.
Neil Bone
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Post by markt on Jul 1, 2008 15:35:34 GMT
Great pics there Pete. Welcome to the forum  |
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Post by digitalsky on Jul 1, 2008 17:09:27 GMT
HI Neil, are you questioning all of the images or just the set taken on the evening of the 30th June / 1st July? There were several reports of NLC activity on the morning of the 30th and a number of image sets taken from over the country. Many of these show similar structures to those shown in my images. I'm trying to correlate images at the moment from London and Norfolk in the hope that we have chronologically overlapping exposures from which to triangulate an approximate height.
As for the others, I have less faith in the display on the evening of the 30th although I have yet to analyse all images taken on that session. The lack of other reports and the general height of the clouds would suggest a lower confidence here though. My records show photographic evidence of cloud heading up to 50 degrees altitude at this time. There were more NLC type structures out to the north west though which I still have to look at.
The image taken on the morning of the 1st I am less happy to dismiss as cirrus.
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Post by ediacara on Jul 1, 2008 18:12:16 GMT
Amazing pics! The panorama with Moon and M45 ... Breathtakingly beautiful!
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Post by olaf3sky on Jul 1, 2008 19:41:27 GMT
Hi, with the help of binoculars I observed possible faint NLC from Rostock in NE Germany. It was necessary to process the images very strong. Although of course the images are not typical "nice" or clear I think that the structures are real NLC. A lot of cirrus has been observed already in the evening, too. Partly not only grey but silverbluelike in greater heights (but not with contours like that). Here the results for discussing: 3sky.de/NLC/NLC2/2008/080630/nlc_080630.htmlRegards, Olaf |
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Post by heaven31 on Jul 1, 2008 19:53:51 GMT
Didn't some of these images get used on Space Weather? I recognise the one with the moon and the plaiedes(sp?) If not, they're very similar, lovely pics Jo x |
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Post by neilbone on Jul 1, 2008 20:01:06 GMT
I'm certainly not disputing the early-morning (end of 29-30 June) images - they're cast-iron, and very reminiscent of one I photographed here in 2003! As per the timing of my negative observation, I am not at all convinced of the 30 June evening images ca 2200 UT. Wasn't up and about for the morning shift at dawn on 30 June to July 1 - chemotherapy is a bit of a bugger for the energy levels, but I'll be over it soon....
Hope this clarifies for everyone!
Not much chance of anything tonight - frontal cloud advancing nicely, and maybe even a coler night for a satisfying kip all round!
Onwards and upwards,
Neil
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