Abstract

Having seen that meteorological forecasts of DNI may help in performance assessment in CSP systems, this chapter provides an overview on DNI forecast options. Nowcasting for the upcoming few hours and forecasting for the upcoming days is treated separately. The chapter provides an introduction in meteorological basics and terminology being useful for the reader when ordering forecasts from operational meteorological centers or meteorological service providers. After that the technologies based on numerical weather prediction, statistical time series modeling, all-sky imagers, and satellites are described. Necessary postprocessing steps to be performed after obtaining the standard weather service products are discussed as well. After reading this chapter, an engineer should be capable of understanding what kinds of forecasts are routinely provided, what each forecast includes and how to use them properly.

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