Saturday, 13 September 2008

Odd radius halos in Nydek

After a year of non-pyramidal halo complexes, finally a pyramidal one appeared. On 10 September, I (Martin Popek) observed 9°, 18°, 20°, 23° and maybe a 24° halo, together with weak 9°, both 18° and 23° parhelion, which was separated from the 23° halo. 50 images were stacked using RegiStax. Notice the bad anomalies which are created by Bishop's ring ( 1 - 2 ).

The phenomena formed in thick cirrostratus clouds before the arrival of a warm front. Some meteorogical data are also provided ( 3 - 4 ).

Text: Martin Popek, Matej Grek

3 comments:

  1. This one display was very nice ... unfortunately i've managed to observe only a portion of 22 or 23(?) halo. Well, too bad i haven't stacked some images.

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  2. Good display. But what anomalies? Don't see anything.

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  3. By anomalies, we ment those like "circles" at some photos. As we said, it was done by Bishop's ring. Here is link to photo where the anomalie can be seen --- http://img68.imageshack.us/img68/4764/629260282596pf5.png

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