Ice Halo Tracker
Automatic all-sky cameras that watch the whole sky for ice halos, every day from sunrise to sunset.
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Cameras
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Halo list
Which halos have been seen where, how often and on which days: from the cameras and from observations added by the operators.
Learn about halos
How tiny ice crystals make rings, arcs and bright spots in the sky, and which halo comes from which crystals.