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Thread: Solar granulation

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    Default Solar granulation



    Hi,

    I posted a few solar animations they can be found at the following Twitter thread

    https://twitter.com/chrfrde/status/1123729626780569609

    Enjoy,

    Christian

    PS: I haven't posted here for a while mainly because the image handling broke and I didn't have the nerve to deal with 3rd party hosting. I considered embedding tweets in posts since that is my "home" where I have stuff hosted anyway but it doesn't seem allowed to insert the required HTML. However from the link below there might be a relatively painless way to add forum support for a custom BB Code [tweet] tag:

    https://www.vbulletin.org/forum/showthread.php?t=320191
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    Default Re: Solar granulation

    Very nice Christian!
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    Default Re: Solar granulation

    ohh wow!, the sun is rotating!

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    Default Re: Solar granulation

    Cool ! Thanks for sharing it
    Phill. Dreaming of Clear Skys ....

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    Default Re: Solar granulation

    Quote Originally Posted by yobbo89 View Post
    ohh wow!, the sun is rotating!
    I should have mentioned this is was taken with an Alt-Az mount so the apparent clockwise rotation is due to field rotation.
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    Default Re: Solar granulation

    That is really good and a lot beater than I get.


    peter

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    Default Re: Solar granulation

    Quote Originally Posted by p1taylor View Post
    That is really good and a lot beater than I get.
    Thanks. Note that animation is heavily processed the actual contrast of granulation is quite weak.
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    Default Re: Solar granulation

    Very nice

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    Default Re: Solar granulation

    Brilliant. So, if I understand correctly,you basically subtracted the mean solar image and then enhanced the contrast of what was left of the signal to reveal the granulation. I like it!
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    Default Re: Solar granulation

    Quote Originally Posted by richardflyfisher View Post
    Brilliant. So, if I understand correctly,you basically subtracted the mean solar image and then enhanced the contrast of what was left of the signal to reveal the granulation. I like it!
    Thx yes that is essentially it. While the granulation is also well visible in a "normal" view (with a bit of stretching and sharpening) it it is hard to make it appear across the entire disk due to the overall brightness / contrast gradient therefore the subtraction was helpful.
    -- Christian

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