Radio emission of extensive air showers at microwave frequencies

We found that the power of incoherent radiation of ionization electrons of extensive air shower in the frequency range of 100-200 GHz makes up > 10^-24 W/(m²·Hz) for a shower with energy ∼ 10¹⁸ eV at a distance of 5 km from its axis. This means that, unlike fluorescent detectors, radio telescope with an effective area > 300 m² can monitor the trajectory of showers with energy > 10¹⁸ eV at all times regardless of the weather. Maximum spectrum (near the frequency of 150 GHz) is three orders of magnitude more than the experimentally measured value of a characteristic frequency range ∼ 5-10 GHz.