Wavelengths in the UV Range Optimal for Atmospheric Optical Communication on Scattered Radiation in the Daytime and at Night

Possibilities of atmospheric optical communication on scattered radiation in the UV wavelength range are studied. The wavelength from the range lambda = 200-400 nm at which the signal-to-noise ratio (SNR) is maximum is determined depending on the baseline distance and the observation conditions. The estimate is obtained for daytime and night communications. To calculate the signal-to-noise ratio, the impulse response (IPR) of the communication channel should be known. It has been calculated by the Monte-Carlo method with local and modified double local estimates at collision points.