Comparison of two methods for cloud flagging of spectral UV measurements
Vasaras. A., A. F. Bais, U. Feister, C. S. Zerefos
[περίληψη] This paper compares two methods of cloud flagging that were developed by the Deutscher Wetterdienst (DWD) and by the Laboratory of Atmospheric Physics, University of Thessaloniki (LAP). The two methods are applied on a same data set to uncover their similarities and differences. The LAP method aimed in flagging the quality of global UV irradiance spectral measurements with respect to the purity of their spectral characteristics, while the DWD flags describe the sky conditions and their effects on the radiation field in Absolute sense. In this respect the two methods appear to have distinct differences, but also similarities, in describing when the Sun’s disk is occluded or not.
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