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| Titel |
Development of a sky imaging system for short-term solar power forecasting |
| VerfasserIn |
B. Urquhart, B. Kurtz, E. Dahlin, M. Ghonima, J. E. Shields, J. Kleissl |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1867-1381
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 8, no. 2 ; Nr. 8, no. 2 (2015-02-20), S.875-890 |
| Datensatznummer |
250116141
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| Publikation (Nr.) |
 copernicus.org/amt-8-875-2015.pdf |
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| Zusammenfassung |
| To facilitate the development of solar power forecasting algorithms based on
ground-based visible wavelength remote sensing, we have developed a high
dynamic range (HDR) camera system capable of providing hemispherical sky
imagery from the circumsolar region to the horizon at a high spatial,
temporal, and radiometric resolution. The University of California, San Diego
Sky Imager (USI) captures multispectral, 16 bit, HDR images as fast as every
1.3 s. This article discusses the system design and operation in detail,
provides a characterization of the system dark response and photoresponse
linearity, and presents a method to evaluate noise in high dynamic range
imagery. The system is shown to have a radiometrically linear response to
within 5% in a designated operating region of the sensor. Noise for HDR
imagery is shown to be very close to the fundamental shot noise limit. The
complication of directly imaging the sun and the impact on solar power
forecasting is also discussed. The USI has performed reliably in a hot, dry
environment, a tropical coastal location, several temperate coastal
locations, and in the great plains of the United States. |
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