Abstract
The results of two-frequency lidar sounding of the atmosphere at the Kamchatka lidar station (52°58′17″ N, 158°15′07″ E) are presented. The scattering signals were recorded in the altitude range 25–600 km. Lasers with radiation at wavelengths of 532.08 and 561.106 nm were used. The aerosol formation in the middle atmosphere and resonance scattering by excited atomic nitrogen and oxygen ions in the upper atmosphere are studied. Pronounced light-scattering layers have been revealed at altitudes of 200–400 km. Their appearance is due to the presence of excited atomic oxygen and nitrogen ions. The difference in signal values at two wavelengths is discussed. A way of signal generation is suggested; signal values at different wavelengths are estimated.
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