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I suppose George asked about the picture Keelin posted at December 15th (reply #248015). It all depends on the height / position relative to the sun. Although that is difficult to see it looks like a 22 degrees halo. A CZA occurs at twice the distance of the 22 degrees halo near the zenith. When the halo occurred on a relative high position like George suggests, it still can’t be a CZA because has to curl upwards. That’s why a CZA is also called the smile in the sky. Keelin wrote that the halo was taken slightly up. That implies a 22 degrees halo.
On the last one you posted Keelin, I can see a faint arc curving upward at the right that is tangent to an upper part of a bow. In fact the same applies to this one as above. It all depends on the relative position to the sun. When it is at 22 degrees from the sun this must be the 22 degrees halo with an upper tangent arc. But when this was observed higher, this could have been a CZA tangent to the supralateral or 46 degrees arc. Do you remember the position Keelin?
Any other opinions on this?
P.S.: It is always fun to explain others, asking what om earth you are looking up for, what there is to see. I think we all had our moments people were surprised after pointing out and explaining. This contributes to the fun as far as I am concerned.
So let’s unwrap the gift (great title Michael) of the game and here is the next one.
Contrail Game #2
Thanks again Alec for the explanation about the two splitting arcs and for the new tip. Nice homework to do for me to explore stacking. Now I just have to wait for a good occasion.
And yes the former pictures were quite a haul. Almost the whole day a 22 degrees halo was present. Later a UTA came on top of it and then – while the sun lowered – I could see the Parry forming his roof together with the rising of the horns of the UTA. At the end of the show, when the Parry was almost vanished, also a CZA appeared. I think it will take years before I can spot something the like.
From rare to simple. Simple does not mean less beautiful, like you and Keelin showed.
Just an hour ago this simple sundog appeared with a rather broad fluffy parhelic tail.
Let the windmill keep on grinding sunsets Alec.
Hygge, you have a talent for finding extraordinary pictures.
Keelin, On The Threshold Of A Dream is a dream itself.
I see Michael offers amazing sunrises, I am afraid from me mainly sunsets will follow.
I understand the misunderstanding Hygge (??). The Mamma Mia was my reaction to the towering clouds Alec posted and in general this phrase can be applicable also for other posts, but then not literally. :)
Alec, you are far to harsh on yourself. You already made me very happy and with your tips I found out I was some Lowitz experiences richer than I thought I was. Christmas stress is a serious matter you must not underestimate. Something strong might help, I suggest something liquid 15 years old the least and a bit of Zen?
Anyway I studied meteoros.de and atoptics.co.uk and I am sure about the upper Lowitz and the lower one around the sundog. The middle Lowitz (im Deutsch: der kreisformige Lowitzbogen) seems to be faintly present but maybe I am over-enthousiastic now.
Still I am puzzled about the two splitting arcs top right of my last picture. Regarding your track record (yes, not the one you falsely accuse yourself of), I would be happy with your opinion on it. But please no stress on it. I wouldn’t like to be the cause of a 19th nervous breakdown.
And also thanks for the new link. It is fun reading about the quest for every detail and every observation of rare halos.
Regards from a happy Hans
I hope your Friendly Figural #5 will find me soon Keelin. It looks very cute. I look forward to meet him over here. You mentioned former appearances that traveled their way across the pond. Now the lacerta you once posted has appeared on this side of the waters. A Friendly one as well.
You are right about the first attempt, Alec. The cause of it was not the poor quality of the picture, but I subtracted red from green as suggested in the article when working with a JPG. Afterwards I tried it with the normal b-r subtraction what is advised when working with RAW. It turned out to work as well for JPG.
First question: are you sure about the middle Lowitz? How can you distinguish from an upper one?
I had a lot of fun yesterday checking some of my pictures. I once spotted an upper Lowitz in France. Les Cowley published it as an OPOD.
No lower Lowitz to see. On some pictures taken earlier that were less clear in my opinion I found the following:
Also the lower appears! I was flabbergasted.
In close up.
Third and last one:
What strikes me in this third picture is the splitting of two arcs top right of the picture. All what I can think of is the continuation of the UTA in a circumscribed arc (for the lower one) and a continuation of the Parry for the upper one. For what it is worth. Do you have an opinion on this one?
P.S.: Again you were right: I did miss things without this magic of b-r processing. Thanks a lot.
Doing better already and much to my surprise on a picture taken at the same occasion as above, but somewhat later, an upper Lowitz appeared. You were right I now can see what I was missing. I will have to check more of my archive.
An upper Lowitz arc touching the Parry arc and crossing the UTA.
Thanks for the help Alec. Nice rule for the supralateral and 46.
Just installed GIMP and this was what I got for the same picture.
I guess I have to exercise a bit with the possibilities of GIMP. The Parry is not that clear at first try. Maybe it is because I only have a JPG version (unfortunately). For the lower Lowitz I think the picture is not good enough to distinguish, but I would be happy if so. I once spotted a well distinguishable upper Lowitz. Just have to be alert when the conditions seem favorable.
Indeed no up or down on my picture with the tentacles Hygge. I can’t remember the orientation very well.
Rather confusing imho
