Abstract
In the previous papers8) 9) 10), we have developed a method of measuring the visible spectral radiance of all sky elements using a general purpose digital camera with a fish-eye lens. In this paper, we expanded this method and measured the ultraviolet (UV), visible (VIS) and near-infrared (NIR) spectral radiance of all sky elements with the same fisheye camera. The fish-eye camera is portable for field measurements in various climates. We improved the way of colorimetrical calibration of the fisheye digital camera. The calibrated camera measures the all sky distribution of the XYZ tristimulus values more accurately. The XYZ tristimulus values are transferred into the xy choromaticity coordinates. On the other hand, the UV, VIS and NIR spectral radiance of the sky elements is measured by a spectroradiometer under various weather conditions. The eigenvectors of measured spectral radiance are calculated by principal component analysis. Using the eigenvectors, the relative spectral power distribution is computed and then transferred into the all sky distribution of UV, VIS and NIR spectral radiance by tristimulus values Y [cd/m2].
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of Environmental Engineering (Transactions of AIJ)
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
