Category: Terms and Definitions

Color Plates

NREL   Best Research-Ce Efficiencies   Thin-Film Technologies   VThin-film crystal   VThin-film crystal   SunPower (96x)   ^28   о 24   UNSW.   UNSW   Stanford   Variant UNSW   —-”■“■’’’University So. Florida’ ARCO. Boeing   T^^Photon Energy ,—“^ARCO і |nitoH c   Matsushita   Monosolar   Solarex   1 University of Maine […]


Tomas Cebecauer is an expert in solar resource assessment, satellite remote sensing, geoinformatics, meteorology, and photovoltaic electricity modelling. He has received PhD in geography and geoinformatics, and is co-author of more than 70 scientific publications. He is one of authors of the decision support online system PVGIS, which notably contributed to development of photovoltaics in […]

Solar Energy Forecasting and Resource Assessment

Solar power is widely acknowledged to be the fastest-growing energy industry in the world. As technological improvements steadily progress toward the erasure of cost and efficiency barriers, two issues are coming to the forefront of public discourse on solar energy—variability and reliability. Solar-project developers and their financiers are increasingly scrutinizing the accuracy of long-term resource […]

Image Processing

Cloud-cover information needs to be extracted from sky images and incorpo­rated in the forecasting model. The image processing—designated as wind – ladder sector—comprises the following steps: Step 1. The image is converted from a spherical to a rectangular grid. Step 2. Pairs of images are used in a particle-image velocimetry (PIV) algorithm that determines the […]


When considering exogenous variables for the forecasting of solar irradiance and related phenomena, the most important one is sky condition and, in particular, cloud cover. Cloud-cover information can be obtained from satel­lite images (e. g., http://www. goes. noaa. gov/browsw. html) or from ground – based sky imagers—usually a CCD camera taking pictures of a convex […]