Physically based correction of systematic errors of Rotating Shadowband Irradiometers

Abstract

The new correction and calibration method, which is developed in this thesis, attempts to remove the measurement errors in the measurements using a physical method. It is based on information of the sensor properties and the atmospheric conditions at the measurement site. This way, no empiric relations obtained from a specific site are required. The method requires estimates of the current DHI and GHI spectra during each measurement of the sensor. Based on these spectra, a spectral correction, which includes a spectrum dependent temperature correction, can be made without employing empirical relationships.