Results 21 to 30 of about 928,348 (261)

Experimental study of bit error rate of free space optics communications in laboratory controlled turbulence [PDF]

, 2010
This paper reports experimental results for the performance of an free space optical (FSO) communication link employing different modulation schemes under the influence of the atmospheric scintillation.
Z. Ghassemlooy, E. Leitgeb, Adebanjo, Olusegun, O. Adebanjo, S. Ansari, S. Rajbhandari, Ghassemlooy, Zabih, Ansari, S., Leitgeb, Erich, Rajbhandari, Sujan, H. Le-Minh, Ijaz, Muhammad, M. Ijaz, Le Minh, Hoa   +13 more
core   +1 more source

Site‐Specific Soil Properties of the US Climate Reference Network Soil Moisture

Vadose Zone Journal, 2016
Core Ideas This study quantifies the variability of soils at US Climate Reference Network sites. Soil properties were determined from the analysis of soil core samples.
Timothy B. Wilson, C. Bruce Baker, Tilden P. Meyers, John Kochendorfer, Mark Hall, Jesse E. Bell, Howard J. Diamond, Michael A. Palecki   +7 more
doaj   +1 more source

On the Use of Rotary-Wing Aircraft to Sample Near-Surface Thermodynamic Fields: Results from Recent Field Campaigns

Sensors, 2018
Rotary-wing small unmanned aircraft systems (sUAS) are increasingly being used for sampling thermodynamic and chemical properties of the Earth’s atmospheric boundary layer (ABL) because of their ability to measure at high spatial and temporal ...
Temple R. Lee, Michael Buban, Edward Dumas, C. Bruce Baker   +3 more
doaj   +1 more source

Propagation characteristics of the vortex beam array through anisotropic non-Kolmogorov maritime atmospheric turbulence

Frontiers in Physics, 2023
This study employs the power spectrum inversion method to generate the phase screens of atmospheric turbulence over the sea, the theoretical model of the vortex beam array emitted by a focusing system through anisotropic non-Kolmogorov maritime ...
Hong Yu, Hong Yu, Bowen Yang, Hanyin Hu, Zheqiang Zhong, Bin Zhang   +5 more
doaj   +1 more source

Coherent polarization shift keying modulated free space optical links over a Gamma-Gamma turbulence channel [PDF]

, 2011
Problem statement: The optical signal propagating through the Free Space Optical (FSO) channel suffers from irradiance and phase fluctuations caused by the atmospheric turbulence, which results in Bit Error Rate (BER) performance degradation ...
Ghassemlooy, Zabih, Popoola, Wasiu Oyewole, Popoola, Wasiu O., Tang, Xuan, Rajbhandari, Sujan, Lee, Chung Ghiu, Ghassemlooy , Zabih, Lee , Chung Ghiu   +7 more
core   +1 more source

Adaptive optics solutions for turbulence mitigation in different scenarios

, 2022
Paper 816104Several studies on different adaptive optics concepts are presented in the article. Each one of the procedures shows its peculiar advantages when considering different situations where the image distortion, due to atmospheric or artificial ...
Scheifling, C., Marchi, G.
core   +1 more source

Restoration of Atmospheric Turbulence-degraded Images Based on Contrastive Learning [PDF]

Jisuanji kexue
Image degradation caused by atmospheric turbulence seriously affects the performance of downstream computer vision tasks such as object detection and image recognition.Existing deep learning-based image restoration models for atmospheric turbulence ...
MIAO Zhuang, CUI Haoran, ZHANG Qiyang, WANG Jiabao, LI Yang
doaj   +1 more source

Wavelength-diversity transmission for fading mitigation in the atmospheric optical communication channel [PDF]

, 2006
Mitigation of index of refraction turbulence (IRT) effects is crucial in long-range atmospheric communication links. Diversity-transmission is one favorable way for fading compensation.
Perlot, Nicolas, Hennes Henniger, Giggenbach, Dirk, Nicolas Perlot, Brandon L. Wilkerson, Henniger, Hennes, Wilkerson, Brandon, Dirk Giggenbach   +7 more
core   +1 more source

Passenger comfort during formation flight within atmospheric turbulence [PDF]

, 2012
Includes abstract.Includes bibliographical references.Formation flight is currently being investigated as a means to reduce drag and improve fuel efficiency in commercial aviation.
Bizinos, Nicholas
core   +1 more source

Stochastic decomposition of atmospheric turbulence

, 2022
Gustiness and pronounced intermittent behavior of wind speed measurements in the turbulent atmospheric boundary layer are analysed. A new set of parameters is worked out which finally shows that the two-time statistics of atmospheric turbulence is ...
Morales, A., Peinke, J., Wächter, M.
core   +1 more source