Ozone Content over the Russian Federation in the First Quarter of 2019

The review is compiled of the results of the total ozone (TO) monitoring in the CIS and Baltic countries that functions in the operational mode at the Central Aerological Observatory (CAO). The monitoring system uses data from the national net work equipped with M-124 filter ozonometers op er at -ing under the methodological supervision of the Main Geophysical Observatory. The quality of the functioning of the entire system is operation ally con trolled in CAO by the comparison with the observations obtained from the OMI satellite equipment (NASA, USA). Basic TO observation data are generalized for each month of the first quarter of 2019 and for the first quarter. Data of routine observations of surface ozone values in the Moscow region and Crimea are also considered.