Influence of HF powerful radio waves on the ozone number density in the earth's atmosphere

We present some results of microwave measurements of ozone number density variations in the mesosphere (in the ionospheric D-region at altitudes of ∼ 60 km) under conditions when the ionosphere was pumped by high-frequency powerful radio waves radiated by the Sura heating facility, which is located near Nizhny Novgorod, Russia (coordinates: 56.15°N, 46.13°E). Determination of the ozone number density in the upper atmosphere was made using the method of the ground-based microwave radiometry, which is based on spectral measurements of thermal atmospheric emissions detected in the frequency range of the ozone radiation. The decrease of microwave emission intensity for the ozone line in HF-pumped atmosphere was first revealed.