INTEGRAL ASSESSMENT OF ATMOSPHERIC AIR QUALITY IN THE LARGEST CITIES OF RUSSIA BASED ON TROPOMI (SENTINEL-5P) DATA FOR 2019–2020 СтатьяElagin P.O., Morozova A.E., Sizov O.S., Agzamov N.A., Fedash A.V., Lobzhanidze N.E.Cosmic Research. Том 60. 2022. С. S57-S68