Abstract: A new shadow-ring device for measuring diffuse solar radiation at the surface is presented. In this device the seasonal variation of shadow is followed by moving the detector horizontally. This unique characteristic ...

Abstract: This work describes an application of a multilayer perceptron neural network technique to correct dome emission effects on longwave atmospheric radiation measurements carried out using an Eppley Precision Infrared Radiometer ...

Abstract: This work describes the seasonal and diurnal variations of downward longwave atmospheric irradiance (LW) at the surface in S?o Paulo, Brazil, using 5-min-averaged values of LW, air temperature, relative humidity, and solar ...