Results 21 to 30 of about 888,402 (309)

Performance of BPSK subcarrier intensity modulation free-space optical communications using a log-normal atmospheric turbulence model [PDF]

, 2010
In this paper, we present simulation results for the bit error rate (BER) performance and the fading penalty of a BPSK - subcarrier intensity modulation (BPSK-SIM) free-space optical (FSO) communication link in a log-normal atmospheric turbulence model ...
S. S. Muhammad, Z. Ghassemlooy, E. Leitgeb, Tang, Xuan, Muhammad, Sajid Sheikh, S. Rajbhandari, Ghassemlooy, Zabih, Popoola, Wasiu Oyewole, W. O. Popoola, Kandus, Gorazd, Leitgeb, Erich, Rajbhandari, Sujan, X. Tang, G. Kandus   +13 more
core   +1 more source

Testing and development of transfer functions for weighing precipitation gauges in WMO-SPICE [PDF]

Hydrology and Earth System Sciences, 2018
Weighing precipitation gauges are used widely for the measurement of all forms of precipitation, and are typically more accurate than tipping-bucket precipitation gauges.
J. Kochendorfer, R. Nitu, R. Nitu, M. Wolff, E. Mekis, R. Rasmussen, B. Baker, M. E. Earle, A. Reverdin, K. Wong, C. D. Smith, D. Yang, Y.-A. Roulet, T. Meyers, S. Buisan, K. Isaksen, R. Brækkan, S. Landolt, A. Jachcik   +18 more
doaj   +1 more source

BPSK subcarrier intensity modulated free-space optical communications in atmospheric turbulence [PDF]

, 2009
Free-space optical communications (FSO) propagated over a clear atmosphere suffers from irradiance fluctuation caused by small but random atmospheric temperature fluctuations.
Ghassemlooy, Zabih, Popoola, Wasiu Oyewole, Popoola, Wasiu O., Ghassemlooy , Zabih   +3 more
core   +1 more source

Correction: Lee, T. R., et al. On the Use of Rotary-Wing Aircraft to Sample Near-Surface Thermodynamic Fields: Results from Recent Field Campaigns. Sensors 2019, 19(1), 10

Sensors, 2019
The authors wish to make the following correction to this paper [...]
Temple R. Lee, Michael Buban, Edward Dumas, C. Bruce Baker   +3 more
doaj   +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

Blind atmospheric turbulence deconvolution [PDF]

IET Image Processing, 2020
A new blind image deconvolution technique is developed for atmospheric turbulence deblurring to overcome limitations of ‘generic’ blind deconvolution algorithms that do not take into account the complicated physics of the turbulence. The originality of the proposed approach relies on an actual physical model, known as the Fried kernel, that quantifies ...
Charles-Alban Deledalle, Jérôme Gilles
openaire   +1 more source

Free-space optical communication employing subcarrier modulation and spatial diversity in atmospheric turbulence channel [PDF]

, 2008
An expression for the bit error rate of a multiple subcarrier intensity-modulated atmospheric optical communication system employing spatial diversity is derived. Spatial diversity is used to mitigate scintillation caused by atmospheric turbulence, which
Ghassemlooy, Zabih, Popoola, Wasiu Oyewole, Allen, John, Popoola, W, Popoola, Wasiu O., Leitgeb, Erich, Gao, S, Gao, Steven, Allen, Joe, Ghassemlooy , Zabih   +9 more
core   +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

APPLICATION OF SUPERSTATISTICS TO ATMOSPHERIC TURBULENCE [PDF]

Complexity, Metastability and Nonextensivity, 2005
7 pages, 4 figures. To be published in the proceedings of the 31st Workshop of the International School of Solid State Physics Complexity, Metastability And Nonextensivity Erice (Sicily) 20-26 July 2004, Eds. C. Beck, G. Benedek, A. Rapisarda and C. Tsallis, World Scientific (2005)
Rizzo, S., Rapisarda, A.
openaire   +3 more sources