TY CONF TI PHASE FUNCTION FOR AGGREGATE AND HEXAGONAL ICE COLUMNS ITS CONSISTING, OBTAINED IN THE APPROXIMATION OF PHYSICAL OPTICS KW light scattering KW complex aggregates KW physical optics KW cirrus clouds KW geometric optics JO The XXXI International Symposium "Atmospheric and Ocean Optics. Atmospheric Physics" AU Kan, N.V. AU Shishko, V.A. AU Tkachev, I.V. AU Timofeev, D.N. AU Konoshonkin, A.V. AU Kustova, N.V. PY 2025 PB V.E. Zuev Institute of Atmospheric Optics, Siberian Branch of the Russian Academy of Sciences