Height dependence of characteristics of power spectra of temperature investigated in the surface layer of White Sands /US
conference paper
A field trial was performed in the arid scrub area of White Sands, NM /USA in October 2017 investigating the atmospheric influence on imaging and sensor performance. In this paper we focus on the strength of optical turbulence. Optical turbulence is described by the structure function parameter of the refractive index Cn 2. It is responsible for beam wander, blurring. and scintillation. "Ground truth" measurements of optical turbulence were carried out using a Boundary Layer Scintillometer . The measurements were taken along an optical path of 3.64 km and a height of 1.5 m. Additionally, height dependency of Cn 2 is explored in the surface layer using 4 ultrasonic anemometers at discrete heights between 1 and 10 m. Power spectra of temperature were determined from time series of the ultrasonic anemometer data, which were inspected for the height dependency of spectral characteristics. The effect of the arid scrubs area on the applicability of Kolmogorov turbulence was investigated and discussed in this paper. © 2018 SPIE.
Topics
Height dependenceOptical turbulenceSurface layerUltrasonic anemometerAdaptive systemsAnemometersBoundary layersLight propagationPower spectrumRefractive indexScintillationSpectrum analysisTurbulenceKolmogorov turbulenceOptical turbulenceSensor performanceSpectral characteristicsStructure functionsAtmospheric thermodynamics
TNO Identifier
844216
ISSN
0277786X ; 9781510621572
Source
Environmental Effects on Light Propagation and Adaptive Systems 2018, 12 September 2018 through 13 September 2018, 10787
Publisher
SPIE
Article nr.
1078705
Source title
Proceedings of SPIE - The International Society for Optical Engineering
Editor(s)
Gladysz, S.
Stein, K.U.
Stein, K.U.
Files
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