Subhelic arc
A subhelic arc is a rare halo, formed by internal reflection through ice crystals, that curves upwards from the horizon and touches the above the anthelic point. Subhelic arcs are a result of ray entrance and exit through prism end faces with two intermediate internal reflections.
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Subhelic arc
A subhelic arc is a rare halo, formed by internal reflection through ice crystals, that curves upwards from the horizon and touches the above the anthelic point. Subhelic arcs are a result of ray entrance and exit through prism end faces with two intermediate internal reflections.
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A subhelic arc is a rare halo, ...... rmediate internal reflections.
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A subhelic arc is a rare halo, ...... rmediate internal reflections.
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Subhelic arc
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