Saturday, September 16, 2006

Circumscribed halo and pyramid halos in Sardinia

This display was captured by Jan Drahokoupil in Sardinia on 6. September. The 22° halo is surrounded by elliptical circumscribed halo. The small halo around the sun is 9° halo or 9° column arc (or both together). Simulations could give better glue. Later on the display changed and there were also 18° plate arcs.

More photos here.

7 Comments:

Blogger Michael Ellestad said...

Wow now thats splendid I wonder if there were any 24 degree column arcs?

16 September, 2006  
Blogger Marko Riikonen said...

That's what I've been wondering as well. Should make simulations.

16 September, 2006  
Anonymous Anonymous said...

Wow, nice and clear display!

17 September, 2006  
Blogger Jari Luomanen said...

Yep, this one's a beauty. It would be great to see photos from the anthelic region also.

Jari

17 September, 2006  
Blogger Patrik Trncak said...

Jari and all, yes, I found Wegener arcs on photos, but very very very faint! I must use extreme unsharp mask.

17 September, 2006  
Blogger Marko Riikonen said...

The photo besides Patrik's simulation shows also parhelia. I think sun is very close to the max sun elevation for parhelia. Would be nice to know the time and locations to count sun elevation. Patrik's simulation seems to be for lower sun elevation.

18 September, 2006  
Blogger Patrik Trncak said...

Yes, my simulation is wrong for sun elevation, but for show 46halo and wegener arc is adequate.

18 September, 2006  

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