Aerosol optical characteristics at BTN station

Measurements performed at BTN (Icaro Camp) in the austral summer 2001 - 2002 with the PREDE POM 01L sun-photometer. It detects direct solar radiative flux as well as diffuse at selected scattering angles and at six wavelengths. Aerosol optical characteristics were derived making use of Nakajima inversion code SKYRAD. Aerosol optical depth was evaluated at 6 channels centered at 315, 400, 500, 870, 940, 1020 nm wavelength bands. The sampling time interval is about 15 minutes. The air mass is also given. Data were collected under cloudless-sky conditions. An in situ radiometer calibration is also performed by means of a modified Langley plot.