Autumn Solar Halos

08.11.2010

123 image stack.

 

100 image stack.

A single frame.

Bright 22 halo

07.6.2010 (17:18 - 17:38 GMT +2, 42 frames)

 

For this simulation the main contributor are randomly oriented short-shaped column crystals. Minimum amount of plates were used for parhelias and for weak CZA. Long-shaped columns were used for weak tangent arc and for upper suncave Parry arc, the latter shows up faintly on the stacked photograph.
It's worth to mention that in case when randomly oriented long-shaped columns were used the 22 halo bocame very diffuse so shorter columns were needed. The software used for simulating this display is Halopoint 2.0 by Jukka Ruoskanen.

Single frame vs. 42 frames stack comparison

 

This was one amazing summer display, the sun was low but halo is still full.

 

47 image stack.

Solid 23 parhelia

24.6.2010

37 image stack.

Halo display

17.6.2010

51 image stack.

19 image stack.

17 image stack.

Can you spot the infralatereal arc ?

Multidisplay

08.6.2010

On imag above the separation between the CZA and 46° halo is visible particularly well. The sun elevation is 28.9-27.6°.

After enhanceing the image in Photoshop the supralatereal arc becomes visible as well. Note: there is also an infralatereal arc on the right side.

 

Here the sun elevation is 21.5-19.6°. 22° halo still remains strong and tangent arcs are clearly fainer than 22° halo. My vote goes to 46° halo.

A bright halo display in Järvepera

26.5.2010

 

Supralatereal arc

23.4.2010

40 image stack.

 

Low pressure halos

17.4.2010

HDR stack

 

 26 frames.

 

HDR test

I thought why not to give HDR technique another try. For this test I used photos from 19.4.2009 display. I captured 3 exposure-set in every 40sec. So it's 45 photos in 10 minutes. Again Photomatix was used to create 15 tone mapped and details enchanced HDR files which were then stacked in Registax. And as always a Photoshop usm filter was applied with moderate settings.

And here is somewhat enhanced verison to bring out the fainter 46° halo.
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Mõtlesin, miks mitte anda HDR tehnikale veel üks võimalus. Kuna praegu on halo-vaene periood, siis kasutasin fotosid 19.4.2009 vaatemängust. Iga 40 sekundi tagant sai tehtud särikahvel, seega 10 minuti jooksul klõpsisin 45 fotot. Igast särikahvli kolmest kaadrist tegi Photomatix ühe "tone mapped" ja "details enchanged" HDR faili. Arvestades fotode kogust ja särikahvli jaoks vajalikku 3 kaadrit, tuleb kokku 15 HDR faili, mille stäkkimiseks kasutasin Registax nimelist programmi. Tulemuse laadisin Photoshop'i, kus lisasin USM filtri, et välja tuua mõnevõrra nõrgemad halod.

Siin on samast pildist veel üks töödeldud versioon, et välja tuua 46° halo.

Parhelic cirle

04.7.2009

Multidisplay

01.7.2009

This display came with a hot weather, the sun was up high slowly burning the living creatures on the field and the air was full of moisture. This is a common summer display when the sun is about 50° above the horizon. Fortunately I finished my job inside and drove ahead on the fields when the first patches of the parhelic circle started to appear.

The bigger white circle is named parhelic circle - a halo of multiple raypaths.
The smaller one is 22° halo with its tangent arcs.
It's also possible to detect a pair of parhelias on the parhelic circle. Their distance increases as the sun gets higher. 12:30-12:40 GMT+2, suns elevation 53.8°


A nice 22 halo and faint tangent arcs between the launch pause.


Around 06:30 GMT+2

CZA and parhelic circle

08.6.2009

On the field with halos

20.5.2009






1 - 22° halo
2 - circumscribed halo
3 - 46° infralatereal arc
4 - parhelia
5 - parhelic circle
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1 - 22° halo
2 - piiritletud halo
3 - 46° halo alumine puutujakaar
4 - päikesekoer
5 - horisondiring

46 degree halo

19.4.2009

A nice display. 46° halo, long tangent arcs and more. Later a high sun Parry arc.
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Ilus vaatemäng. 46° halo, pikad puutujakaared ja muud halod. Hiljem Parry kaar.

Tangent arcs at its best.
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Puutujakaared päeva parimas staadiumis.




I suspected 9° halo...in case below it's clearly not.
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Siin kahtlustasin 9° halo...on näha, et seda pole - on ainult kõige tavalisem väikese halo ring.

Complex halo dispaly

19.2.2009

Pretty good start of 2009. First complex halo display this year.
First image in row includes 14, second one 13 frame stack.
22° halo, sundogs, 22° tangent arcs, supralatereal arcs, CZA, parhelic circle, upper suncave Parry arc.
Sun's altitude 20-21° above the horizon.
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Päris hea 2009 aasta algus. Esimene keerulisem halo vaatemäng sellel aastal.
Esimene sellest reast 14, teine 13 kaadrit üksteise peal.
22° halo, päikesekoerad, 22° puutujakaared, 46° puutujakaared, seniidikaar, horisondiring, Parry kaar.
Päikese kõrgus 20-21° horisondist.


12 stack.
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12 pilti.


Images form the same day taken a few hours apart.
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Samal päeval mõnetunniste vahedega tehtud pildid.

June radius show

01.6.2008
9 for sure, 20 and 24 are there, but a questionmark remains on 35° halo.

9 päris kindlasti, 20 ja 24 on olemas, 35° puhul jääb küsimärk.


05.6.2008
Some images from this memoriable display. 9,9CA,18,20,22,23PA,24,46, 22 tangent arcs, sundogs, parhelic circle, 120° parhelions. 12 halo forms total, not bad !

Mõned meeldejäävamad raadius-halo pildid sellest päevast. 9,9CA,18,20,22,23PA,24,46, 22 puutujakaared, päikesekoerad, horisontaalring ja paranthelionid. Kokku 12 erinevat halo, pole paha.


Later a partial CZA in contrail.

Hiljem osaline seniidikaar lennuki kondensatsioonipilves.