AN EXAMINATION CONCERNING THE MEASUREMENT OF SOLAR IRRADIANCE AND DAYLIGHT ILLUMINANCE

In the measurement of the solar irradiance and the daylight illuminance, the calibration of the sensors is important. And the relation between the measurement data and the actual phenomenon should be examined closely enough. In this paper, the calibration for securing the measurement accuracy of the sensors is especially described as difficulties in the measurement of solar irradiance and daylight illuminance. In addition, the problems, the problems that occur from the difference of the time constant of sensors when the irradiance and the illiminance are measured at the same time are described.