大気光象（海外）
Atmospheric Optics
http://www.atoptics.co.uk/
Arbeitskreis Meteore e.V.
http://www.meteoros.de/indexe.htm
Optics of the Atmosphere
http://ukazy.astro.cz/eindex.php
Ice Crystal Halos
http://www.ursa.fi/blogit/ice_crystal_halos/index.php