TY JOUR TI Effect of the NO concentration on the ratio I₅₅₇.₇/I₄₂₇.₈ in auroras KW nitric oxide KW 557.7 nm and 427.8 nm emissions KW intensity ratio KW aurora KW modeling KW electron precipitation JO Solar-Terrestrial Physics AU Иванов, В.Е. AU Дашкевич, Ж.В. PY 2024 IS 10 PB Институт солнечно-земной физики СО РАН