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Global simulations of Cn2 using the Weather Research and Forecast Model WRF and comparison to experimental results
Author(s): Carmen Ullwer; Detlev Sprung; Erik Sucher; Thomas Kociok; Peter Grossmann; Alexander M. J. van Eijk; Karin Stein
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Paper Abstract

Electro-optical and laser systems are operated world-wide. Their performance in the outside atmosphere is mainly governed by the strength of optical turbulence Cn2 . The predictability of Cn2 using weather-forecast models is investigated by performing simulations with the Weather Research and Forecast Model (WRF). The WRF output data were combined with a micrometeorological parametrization to derive Cn2 . Simulation runs were performed for locations and times included in our worldwide data set of Cn2 obtained in several field trials over land and over the sea. Experimental data of point and integrated path measurements in the surface layer were compared to model calculations of Cn2 . The regions include different climatic conditions from South Africa, the US, as well as Central and Northern Europe. The applicability of WRF to predict Cn2 at the different locations will be discussed. It will be shown that WRF in a 1.1-km resolution is adequate to provide a first estimate of Cn2.

Paper Details

Date Published: 6 September 2019
PDF: 11 pages
Proc. SPIE 11133, Laser Communication and Propagation through the Atmosphere and Oceans VIII, 111330I (6 September 2019); doi: 10.1117/12.2530280
Show Author Affiliations
Carmen Ullwer, Fraunhofer IOSB (Germany)
Detlev Sprung, Fraunhofer IOSB (Germany)
Erik Sucher, Fraunhofer IOSB (Germany)
Thomas Kociok, Fraunhofer IOSB (Germany)
Peter Grossmann, Fraunhofer IOSB (Germany)
Alexander M. J. van Eijk, Fraunhofer IOSB (Germany)
TNO (Germany)
Karin Stein, Fraunhofer IOSB (Germany)


Published in SPIE Proceedings Vol. 11133:
Laser Communication and Propagation through the Atmosphere and Oceans VIII
Jeremy P. Bos; Alexander M. J. van Eijk; Stephen Hammel, Editor(s)

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