A network of 9 automatic sunphotometers operates in Brazil. Direct sun
and sky radiances are acquired every hour by a weather resistant Cimel
spectral radiometer in the wavelengths of 340, 440, 670,870, ...
Data consisting of AVHRR five channels from satellites NOAA-11 and
NOAA-12 and Sea Surface Temperature derived from brightness
temperature files through NOAA algorithms. Exchange of data after