Results 21 to 30 of about 32,736 (313)

Propagation of uncertainty from observing systems and NWP into hydrological models : COST-731 Working Group 2 [PDF]

, 2010
The COST-731 action is focused on uncertainty propagation in hydrometeorological forecasting chains. Goals and activities of the action Working Group 2 are presented.
Roulin, Emmanuel, Rossa, Andrea, Kok, Kees, Orfila, Bartlome, Nurmi, Pertti, Szturc, Jan, Orfila, Bartolomé, Cofiño González, Antonio Santiago, Beven, Keith J.,, Vehvilainen, Bertel, Seed, Alan, Zappa, Massimiliano, Beven, K. J., Cofino, Antonio S., Schröter, Kai, Martin, Eric, Bruen, Michael, Beven, Keith J., Germann, Urs, Schroeter, Kai   +19 more
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Lidar Estimates of the Anisotropy of Wind Turbulence in a Stable Atmospheric Boundary Layer

Remote Sensing, 2019
In this paper, a method is proposed to estimate wind turbulence parameters using measurements recorded by a conically scanning coherent Doppler lidar with two different elevation angles.
Viktor A. Banakh, Igor N. Smalikho
doaj   +1 more source

Turbulence characterization and image processing data sets from a NATO RTO SET 165 trial in Dayton, Ohio, USA

, 2022
Art. 83800JThe performance of optical systems is degraded by atmospheric turbulence. Over propagation distances that exceed several kilometers, it is difficult to evaluate its impact because of terrain variability - a factor that should be taken into ...
Nicolas, S., Velluet, M.-T., Vorontsov, M., Marchi, G., Schwering, P., Riker, J.   +5 more
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Transformation of spectra of refraction index fluctuations in axisymmetric supersonic jet with the increase in the distance from the nozzle

MATEC Web of Conferences, 2017
In this paper the results of reconstruction of the radial dependence of refraction index fluctuations spectra in axisymmetric supersonic jet from laser transillumination data are presented.
Marakasov Dmitrii, Sazanovich Valentina, Tsvyk Ruvim, Shesternin Andrei   +3 more
doaj   +1 more source

Millimeter-wave propagation over sea in tropical regions

, 2022
Paper 674702In the framework of a cooperative program between Singapore and Germany, radar propagation measurements over sea were carried out in the tropical area of Singapore Strait.
Brehm, T., Fuchs, H.-H., Essen, H., Förster, J.   +3 more
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Laboratory Measurements of the Influence of Turbulence Intensity on the Instantaneous-Fading Reciprocity of Bidirectional Atmospheric Laser Propagation Link

Applied Sciences, 2021
The reciprocity of the atmospheric turbulence channel in the bidirectional atmospheric laser propagation link is experimentally tested. The bidirectional transceiving coaxial atmospheric laser propagation link is built by using a hot air convection-type ...
Yi Liu, Zhi Liu, Yidi Chang, Yang Liu, Huilin Jiang   +4 more
doaj   +1 more source

The effect of atmospheric turbulence on the performance of the free space optical communications [PDF]

, 2008
In free space optical (FSO) communication links, atmospheric turbulence has a significant impact on the quality of a laser beam propagating through the atmosphere.
Ghassemlooy, Zabih, A. Chaman Motlagh, Z. Ghassemlooy, Ahmadi, Vahid, Chaman Motlagh, Abolfazl, V. Ahmadi, Abedi, Kambiz, K. Abedi   +7 more
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Propagation Properties of Gaussian Schell-Model Beam Array in the Jet Engine Exhaust Induced Turbulence

IEEE Photonics Journal, 2020
The effects of the jet engine turbulence on a Gaussian Schell-Model (GSM) beam array propagating in a jet engine plume are studied theoretically. The analytical expressions of the cross-spectral density (CSD) function, the spectral degree of coherence ...
Yuqiu Zhang, Tianyue Hou, Qi Chang, Hongxiang Chang, Jinhu Long, Pengfei Ma, Pu Zhou   +6 more
doaj   +1 more source

Propagation to the upper atmosphere of acoustic-gravity waves from atmospheric fronts in the Moscow region [PDF]

Annales Geophysicae, 2019
The paper uses experimental data of pressure variations on the Earth's surface during the passage of an atmospheric front recorded by a network of four microbarographs in the Moscow region.
Y. Kurdyaeva, Y. Kurdyaeva, S. Kulichkov, S. Kulichkov, S. Kshevetskii, O. Borchevkina, O. Borchevkina, E. Golikova   +7 more
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Radar propagation in coastal environments: Vampira results

, 2022
Paper 636408The performance of sensors operating in coastal environments is severely influenced by the actual atmospheric conditions and the sea surface. Propagation models are in existence, which cope with the varying environment and allow a performance
Pagels, A., Fuchs, H.-H., Essen, H.
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