Global distribution of atmospheric radio noise

This paper derives a global distribution map of atmospheric noise based on the global distribution of lightning discharges obtained by satellite. Assuming the average spectrum of the lightning discharge, the map is derived by calculating the ionospheric propagation loss. By this method, the ratio in the atmospheric noise of the component by local lightning can be determined, leading to a better understanding of the atmospheric noise characteristics. By comparing the noise intensity obtained by this method with the value by CCIR and long-term observations at various sites in the world, it is seen that the value by the proposed method is closer to the value actually measured than the one by CCIR.