'Halosim' web sites
Atmospheric halos
www.atoptics.co.uk 2012-11-19
halosim High Atmosphere Links Resources Search. Index 123456789012345678 Ice Crystal Halos Ice halo displays range from the familiar circle around the sun or moon to rare and prized events when the whole sky is webbed by intricate arcs. Tiny ice crystals in the atmosphere create halos by refracting and reflecting light. Halos bestow a delicate beauty to the skies and tell us about the crystals inhabiting the clouds. Find out how
www.atoptics.co.uk 2012-11-19
halosim High Atmosphere Links Resources Search. Index 123456789012345678 Ice Crystal Halos Ice halo displays range from the familiar circle around the sun or moon to rare and prized events when the whole sky is webbed by intricate arcs. Tiny ice crystals in the atmosphere create halos by refracting and reflecting light. Halos bestow a delicate beauty to the skies and tell us about the crystals inhabiting the clouds. Find out how
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Parry arcs
halosim High Atmosphere Links Resources Search. Index 123456789012345678 Parry Arcs The changing aspect of Parry arcs with solar altitude. Faint 22 halos and upper tangent arcs UTA are included for reference in these halosim simulations. At 0 a unvex Parry arc is almost coincident with the UTA. As the sun rises the sunvex arc separates upward and a uncave Parry arc appears and approaches the UTA. Above 25 a lower sunvex arc
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Supralateral infralateral arcs
halosim High Atmosphere Links Resources Search. Index 123456789012345678 Supralateral Infralateral arcs Colourful supralateral and infralateral arcs form when rays pass between the side and basal end faces of singly oriented hexagonal columns. The filtered right hand simulation shows only rays which have passed through an end face and so isolates the supralateral upper and infralateral lower arcs. The unfiltered simulation at left
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