Friday, June 09, 2006

Wegener anthelic arcs in Ondrejov

Two days (8.6.2006 and 9.6.2006) in Prague and near neighbourhood was very good for halos. The best halo display had Martin Nekola in Ondrejov, he was seen nice Wegener arcs in high Sun elevation (approximately 55 degrees) as big X on anthelion side of Sun. Web site of some next Martin´s halo photos is here.

14 Comments:

Blogger Michael Ellestad said...

Wow very nice!!! all we have had is poorly formed common halos in Ohio USA. I did get rainbow with anticrepuscular rays a week ago though.

10 June, 2006  
Blogger Jarmo Moilanen said...

Congratulations Martin!

Great X of Wegener arc!

Is there a trace of Hastings arc on down right "leg" of the Wegener arcs X? It seems to split into two arcs. That lower could be a Hastings arc and upper Wegener arc.

10 June, 2006  
Blogger Patrik Trncak said...

Jarmo, I was say for Hastings arc too. But I think, it will first Hastings arc on cirrostratus...oh no, it is impossible..and in Czech? No...BUT I seen your comment now and I hope for it! Martin have better photos, I will ask for it.

10 June, 2006  
Blogger Michael Ellestad said...

Hasings arc? I don't think I saw any splitting of the arcs.

10 June, 2006  
Blogger Patrik Trncak said...

Better photos:
http://zeus.asu.cas.cz/~ford/foto/halo/PHK2.jpg
http://zeus.asu.cas.cz/~ford/foto/halo/PHK3.jpg

10 June, 2006  
Blogger Patrik Trncak said...

Here is simulation:
http://halo.kvalitne.cz/ruzne/hast.jpg

10 June, 2006  
Blogger Michael Ellestad said...

I did a simulation of that display with singly and parry oriented columns and I can see seperation between hasting and wegener.

11 June, 2006  
Blogger Claudia Hinz said...

It's a wunderful phenomena, congratulation!!! But I think, the means Hasting is a cloud stripe. Sorry ;o)

Best wishes
Claudia

11 June, 2006  
Blogger Patrik Trncak said...

Claudia: no, it is Hastings arc. Jarmo, Marko: ok, I try normal (no fisheye) simulation.

12 June, 2006  
Blogger Peter-Paul Hattinga Verschure said...

What was seen nearby/around the sun? Only 22deg column arcs, or also 22deg Parry oriented halos?

12 June, 2006  
Blogger Patrik Trncak said...

To Peter: around the Sun was clouds (cumulus), but Martin have some photos from compact camera with fisheye. I hope for Parry.

12 June, 2006  
Blogger Patrik Trncak said...

Here is better simulation:
http://halo.kvalitne.cz/ruzne/simul.jpg

12 June, 2006  
Blogger Les Cowley said...

Are you using HaloSim?

If so it would be useful to post the simulation file so that we can run it too and we can also see what crystal parameters have been chosen.

12 June, 2006  
Blogger Michael Ellestad said...

are you sure thats hastings?

13 June, 2006  

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