Author Archives

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Simulations on the possible new arc from Moilanen crystals

10.5.2010 6 -

Here are some simulations to follow up with the possible new arc from Moilanen crystals ( 1 ). As suggested by Marko, I did some “photo quality” simulations with the two Moilanen arcs using Jukka Ruoskanen software. The Moilanen crystals…

Displays

Sun pillar from Jersey

3.5.2010 5 -

The phenomena began about 30 minutes before sunrise (which was at 5:58am local time) and faded completely about 30 minutes after sunrise. Apart from the main sun pillar you can see faint pillars to the left of the church and…

Displays

Lowitz arcs on old film photographs

22.4.2010 6 -

Last weekend, I visited my parents in Normandy. I took advantage of my visit to dig through my old astronomy journals of observations and pictures. I was looking for my records of what has been my best halo display. In…

Halo information

An animated stereo simulation of streetlight halos

12.4.2010 2 -

For quite a long time I was wondering how halos in nearby ice crystals, especially when caused by divergent light, are perceived spatially. The AKM halo meeting at the Sudelfeld, Germany in January 2010 has intensified this interest once more,…

Displays

Possible new arc from Moilanen crystals

9.4.2010 5 -

I would like to share some thoughts about a possible new arc. This arc seems to be present on the two observations of Moilanen arc at high source elevation from Jari Luomanen ( 1 ) and Marko Mikkilä ( 2…

Displays

Nomenclature woes

19.3.2010 4 -

The kaleidoscope halos in a streetlight present some nomenclature problems. Please see the article Nomenclature Woes on my webpage (click the image above). I invite your suggestions for better names for the halos. Walt Tape

Displays

46° halo on snow surface

16.3.2010 0 -

I welcome all fans of halo! Yesterday, March, 14th I observed halo in interesting enough combination. In this sunny day, walking on the Finnish gulf, I always checked the sky on presence halo. But it was not in the sky,…

Displays

Tapes arc, helic arc and subhelic arc observed in Austria

28.2.2010 7 -

Last January, 27 th, I managed to get one of my best halodisplays during my long observation period of halos – I have observed these phaenomena more than 15 years already. On my way home from work I observed 14…

Displays

Divergent light 22° halo on snow surface

12.2.2010 3 -

The photo here shows divergent light 22° halo on snow surface in Eastern Siberia in January 1996. In airborne crystals divergent light 22° halo is a cigar-shaped surface, sometimes known as Minnaert’s cigar, while on snow surface a slice of…

Displays

A complex halo display on car windshield

30.1.2010 27 -

Photos and videos of the windshield halos seen on the night of 26/27 January in Tampere are now available in two galleries ( 1 – 2 ). The display was dominated by plate and Parry oriented halos. Circumzenith and circumhorizon…

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Author Archives

-

Simulations on the possible new arc from Moilanen crystals

Sun pillar from Jersey

Lowitz arcs on old film photographs

An animated stereo simulation of streetlight halos

Possible new arc from Moilanen crystals

Nomenclature woes

46° halo on snow surface

Tapes arc, helic arc and subhelic arc observed in Austria

Divergent light 22° halo on snow surface

A complex halo display on car windshield

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