Articles | Volume 9, issue 4
Research article
12 Apr 2016
Research article |  | 12 Apr 2016

Calibration methods for rotating shadowband irradiometers and optimizing the calibration duration

Wilko Jessen, Stefan Wilbert, Bijan Nouri, Norbert Geuder, and Holger Fritz

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Cited articles

Augustyn, J., Geer, T., Stoffel, T., Kessler, R., Kern, E., Little, R., Vignola, F., and Boyson, B.: Update of Algorithm to Correct Direct Normal Irradiance Measurements Made with a Rotating Shadowband Pyranometer, in: Proc. Solar 2004, American Solar Energy Society, Boulder, USA, 2004.
Geuder, N. and Quaschning, V.: Soiling of irradiation sensors and method for soiling correction, Sol. Energy, 80, 1402–1409, 2006.
Geuder, N., Pulvermüller, B., and Vorbrugg, O.: Corrections for Rotating Shadowband Pyranometers for Solar Resource Assesment, Solar Energy + Applications, part of SPIE Optics + Photonics 2008, 10–14 August, San Diego, USA, 2008.
Geuder, N., Hanussek, M., Haller, J., Affolter, R., and Wilbert, S.: Comparison of Corrections and Calibration Procedures for Rotating Shadowband Irradiance Sensors, in: SolarPACES 2011, 20–23 September 2011, Granada, Spain, 2011.
Geuder, N., Affolter, R., Kraas, B., and Wilbert, S.: Long-term Behavior, Accuracy and Drift of LI-200 Pyranometers as Radiation Sensors in Rotating Shadowband Irradiometers (RSI), Energy Procedia, 49, 2330–2339,, 2014.
Short summary
This paper covers procedures and requirements of two calibration methods and examines the necessary duration of acquisition of test measurements. Site-specific seasonal changes of environmental conditions cause small but noticeable fluctuation of calibration results. Calibration results within certain periods show a higher likelihood of deviation. These effects can partially be attenuated by including more measurements from outside these periods.