Hallo zusammen,
auch im Westerwald waren am 30.09. schöne Nebensonnen zu beobachten.
Viele Grüße
Rainer
Nebensonnen am 30.09.03 *PIC*
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Michael Ellestad
Upper and lower lowitz arcs are visible
Upper and lower lowitz arcs are visible
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Rainer Hoffmann
Re: Nebensonnen am 30.09.03 *PIC*
Eine Detailaufnahme als Nachtrag.
Viele Grüße
Rainer
Viele Grüße
Rainer
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Alexander (Görlitz)
Re: Upper and lower lowitz arcs are visible
Hallo Michael,
are you shure that upper and lower lowitz arcs are visible?
I've had a long discussion with Claudia and Eva to my parhelia from august 16th. In the consequence of that I'm critical with lowitz arcs if the sun has an altitude between 8 and 16 degrees. What you see on the image can also be triggered by normal parhelia (with 22 degree halo). Eva and I have simulated this situation with Les Cowleys "Halo"-program and we found that the difference between lowitz arcs and parhelia is not easy to determinate. The arcs must be long to be shure what it is.
Please apologize my bad english. I hope you can understand it.
Best,
Alexander
are you shure that upper and lower lowitz arcs are visible?
I've had a long discussion with Claudia and Eva to my parhelia from august 16th. In the consequence of that I'm critical with lowitz arcs if the sun has an altitude between 8 and 16 degrees. What you see on the image can also be triggered by normal parhelia (with 22 degree halo). Eva and I have simulated this situation with Les Cowleys "Halo"-program and we found that the difference between lowitz arcs and parhelia is not easy to determinate. The arcs must be long to be shure what it is.
Please apologize my bad english. I hope you can understand it.
Best,
Alexander
-
Michael Ellestad
Lowitz arc on parhelia reply 2
> Hallo Michael,
> are you shure that upper and lower lowitz arcs are visible?
> I've had a long discussion with Claudia and Eva to my parhelia
> from august 16th. In the consequence of that I'm critical with
> lowitz arcs if the sun has an altitude between 8 and 16 degrees.
> What you see on the image can also be triggered by normal
> parhelia (with 22 degree halo). Eva and I have simulated this
> situation with Les Cowleys "Halo"-program and we found
> that the difference between lowitz arcs and parhelia is not easy
> to determinate. The arcs must be long to be shure what it is.
> Please apologize my bad english. I hope you can understand it.
> Best,
> Alexander
Alexander
The best way to determin whether or or not if there is a lowitz arc the or not is to looka the gap between the parhelion and 22 degree halo if the 22 degree halo is missing and there appears to be diagonal arcs then there is a chance that the entire 22 degree halo is "made" entirely from poor lowitz arcs. I found that out once during a big display on Feb 18 2002 and found not only the upper an lower arcs but also the circular arc when the sun was at an elevation of 25 degrees and an enhancement made to an image showed almost no 22 degree halo near parhelia and there were bright upper and lower lowitz arcs.
I will have t send you soem photos of parhelia showing lowitz arc sometime.
Best,
Michael
> are you shure that upper and lower lowitz arcs are visible?
> I've had a long discussion with Claudia and Eva to my parhelia
> from august 16th. In the consequence of that I'm critical with
> lowitz arcs if the sun has an altitude between 8 and 16 degrees.
> What you see on the image can also be triggered by normal
> parhelia (with 22 degree halo). Eva and I have simulated this
> situation with Les Cowleys "Halo"-program and we found
> that the difference between lowitz arcs and parhelia is not easy
> to determinate. The arcs must be long to be shure what it is.
> Please apologize my bad english. I hope you can understand it.
> Best,
> Alexander
Alexander
The best way to determin whether or or not if there is a lowitz arc the or not is to looka the gap between the parhelion and 22 degree halo if the 22 degree halo is missing and there appears to be diagonal arcs then there is a chance that the entire 22 degree halo is "made" entirely from poor lowitz arcs. I found that out once during a big display on Feb 18 2002 and found not only the upper an lower arcs but also the circular arc when the sun was at an elevation of 25 degrees and an enhancement made to an image showed almost no 22 degree halo near parhelia and there were bright upper and lower lowitz arcs.
I will have t send you soem photos of parhelia showing lowitz arc sometime.
Best,
Michael
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