New High-Sensitivity Ground-Based Microwave Observations of Mesospheric Ozone.

We present new ground-based microwave observations of the diurnal variation of mesospheric ozone made over Göttingen, Germany, over four years from March 2022 to March 2026. These data are of high quality and characterise the diurnal behaviour of the ozone mixing ratio during the solstices and equinoctial conditions. The observed diurnal variation of ozone peaks at ~75 km. At 65 km, the observed diurnal variation is less than half, whereas at 50 km it is less than a quarter of the maximum variation. In this presentation, we compare measurements taken over different periods throughout the year and conduct a comprehensive data analysis. We compare it with satellite observations for further validation.