Ik zit in de Lowitz club!
(volgens les cowley)
Email:
Hello Francis,
I think it is possible that you saw Lowitz arcs. One cannot be certain however.
Here is one of your images enhanced:
A=sundog B=22 degree halo + Lowitz? C+parhelic circle D= Lower Lowitz arc??
Here is a HaloSim simulation:
Notice the likeness. Look also how (in the simulation) the circular Lowitz arc
brightens the 22 degree halo position at 8 and 10 o'clock. There is possibly
some 10 o'clock brightening in your image.
In circumstances like these it is advisable to take photographs at intervals with
the camera on a tripod. In that way (especially if they are digitally stacked) the
clouds can better be distinguished from halo arcs.
The odd looking arc on PICT0001 does not correspond to a halo arc. I think it is
a cloud streak and there is a similar (same?) one on 0003.
Welcome to the Lowitz Club
.
Les
Les Cowley
Atmospheric Optics:
http://www.sundog.clara.co.uk/atoptics/phenom.htm
(volgens les cowley)
Email:
Hello Francis,
I think it is possible that you saw Lowitz arcs. One cannot be certain however.
Here is one of your images enhanced:
A=sundog B=22 degree halo + Lowitz? C+parhelic circle D= Lower Lowitz arc??
Here is a HaloSim simulation:
Notice the likeness. Look also how (in the simulation) the circular Lowitz arc
brightens the 22 degree halo position at 8 and 10 o'clock. There is possibly
some 10 o'clock brightening in your image.
In circumstances like these it is advisable to take photographs at intervals with
the camera on a tripod. In that way (especially if they are digitally stacked) the
clouds can better be distinguished from halo arcs.
The odd looking arc on PICT0001 does not correspond to a halo arc. I think it is
a cloud streak and there is a similar (same?) one on 0003.
Welcome to the Lowitz Club
.Les
Les Cowley
Atmospheric Optics:
http://www.sundog.clara.co.uk/atoptics/phenom.htm