Title
Optical turbulence in the coastal area over False Bay /South Africa: Comparison of measurements and modeling results
Author
Sprung, D.
Van Eijk, A.M.J.
Ullwer, C.
Gunter, W.
Eisele, C.
Seiffer, D.
Sucher, E.
Stein, K.
Contributor
Gladysz, S. (editor)
Stein, K.U. (editor)
Publication year
2018
Abstract
The atmospheric influence on wave propagation was investigated during the First European South African Transmission ExpeRiment from June 2015 to February 2016. The focus in this article was set on optical turbulence, the main atmospheric factor affecting the position and strength of Laser beams, the performance of electro-optical systems and imaging. Measurements were performed continuously during the campaign on three sites over the northwestern part of False Bay. The optical turbulence measurements include in situ measurements using an ultrasonic anemometer at the Roman Rock Island. Integrated optical turbulence measurements were performed at two sites, over a path of 1.8 km and a long distance path of 8.6 km. The sites may be affected by local effects of the coastal environment. For comparison, the optical turbulence was modeled using micrometeorological parameterization. Additionally, the optical turbulence was determined by simulations using the weather research and forecast model WRF. Simulation results were compared to measurements considering seasonal and meteorological variations. The representativeness of the measurements locations for offshore measurements will be discussed. © 2018 SPIE.
Subject
Inhomogeneous distribution of optical turbulence
Maritime surface layer
Seasonal cycle
Adaptive systems
Coastal zones
Laser beams
Light propagation
Offshore oil well production
Turbulence
Weather forecasting
Comparison of measurements
Electro-optical systems
Meteorological variation
Optical turbulence
Seasonal cycle
Surface layers
Transmission experiments
Weather Research and Forecast models
Atmospheric thermodynamics
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TNO identifier
844218
Publisher
SPIE
ISBN
9781510621572
ISSN
0277-786X
Source
Proceedings of SPIE - The International Society for Optical Engineering, 10787
Article number
1078703
Bibliographical note
The Society of Photo-Optical Instrumentation Engineers
Document type
conference paper