Microwave Measurements of Stratospheric and Mesospheric Ozone in Moscow

A brief description of microwave spectrometers MOS-3 and MOS-4 used at LPI for ground-based ozone measurements at 142.2 GHz is given together with the results of their intercomparison. Altitude-temporal distribution of stratospheric ozone over Moscow for winter 2016–17 is presented and discussed. Fast variations of microwave emission of night-time mesospheric ozone with periods starting from 3 min. were discovered in the winter.