Results 41 to 50 of about 13,475 (217)

The Effects of Rainfall on Over-the-Horizon Propagation in the Evaporation Duct over the South China Sea

Remote Sensing, 2022
The evaporation duct (ED) is generated by the evaporation of seawater and can be an influential factor of electromagnetic (EM)-wave propagation. Rainfall also affects atmospheric factors and EM-wave propagation.
Fan Yang, Kunde Yang, Yang Shi, Shuwen Wang, Hao Zhang, Yaming Zhao   +5 more
doaj   +1 more source

Characterizing Evaporation Ducts Within the Marine Atmospheric Boundary Layer Using Artificial Neural Networks

, 2019
We apply a multilayer perceptron machine learning (ML) regression approach to infer electromagnetic (EM) duct heights within the marine atmospheric boundary layer (MABL) using sparsely sampled EM propagation data obtained within a bistatic context.
Earls, Christopher J., Sit, Hilarie
core   +1 more source

Comparison of Evaporation Duct Height Measurement Methods and Their Impact on Radar Propagation Estimates

, 1998
A study was performed to compare shipboard measurements of atmospheric parameters that impact the evaporation duct and its effect on the propagation of electromagnetic energy from the AEGIS AN/SPY-1 radars. Two ships, USS ANZIO and USS CAPE ST GEORGE, participated in the annual NATO exercise, BALTOPS, during the summer of 1997.
John David Whalen
openalex   +2 more sources

Statistical Analysis of Hybrid Atmospheric Ducts over the Northern South China Sea and Their Influence on Over-the-Horizon Electromagnetic Wave Propagation

Journal of Marine Science and Engineering, 2023
Atmospheric ducts are special super-refractive atmospheric structures that can cause over-the-horizon propagation of electromagnetic waves. Different types of atmospheric ducts have different influences on electromagnetic wave propagation.
Yang Shi, Shuwen Wang, Fan Yang, Kunde Yang   +3 more
doaj   +1 more source

Gaussian Process Regression for Estimating EM Ducting Within the Marine Atmospheric Boundary Layer

, 2019
We show that Gaussian process regression (GPR) can be used to infer the electromagnetic (EM) duct height within the marine atmospheric boundary layer (MABL) from sparsely sampled propagation factors within the context of bistatic radars.
Earls, Christopher J., Sit, Hilarie
core   +1 more source

Numerical modeling of the propagation environment in the atmospheric boundary layer over the Persian Gulf [PDF]

, 2001
Strong vertical gradients at the top of the atmospheric boundary layer affect the propagation of electromagnetic waves and can produce radar ducts. A three-dimensional, time-dependent, nonhydrostatic numerical model was used to simulate the propagation ...
Chen, Y, Li, WB, Yao, ZY, Zhao, BL, Zhu, YJ   +4 more
core   +7 more sources

Near-Surface Thermodynamic Influences on Evaporation Duct Shape

Atmosphere
This study utilizes in situ measurements and numerical weather prediction forecasts curated during the Coupled Air–Sea Processes Electromagnetic Ducting Research (CASPER) east field campaign to assess how thermodynamic properties in the marine ...
Sarah E. Wessinger, Daniel P. Greenway, Tracy Haack, Erin E. Hackett   +3 more
doaj   +1 more source

Fluid flow and heat transfer in a dual-wet micro heat pipe [PDF]

, 2007
Micro heat pipes have been used to cool micro electronic devices, but their heat transfer coefficients are low compared with those of conventional heat pipes. In this work, a dual-wet pipe is proposed as a model to study heat transfer in micro heat pipes.
Carey, Churchill, Darhuber, Faghri, HARRIS WONG, JIN ZHANG, Levich, Peterson, STEPHEN J. WATSON, White   +9 more
core   +1 more source

Experimental study of desalination using a system integrated by a glass-covered solar collection water basin and a heat dissipating chimney

Energy Nexus, 2023
A novel solar desalination system and experimental studies to the performance are presented in this paper. The open system takes the harvested solar energy to heat brackish water in its solar collection chamber and its integrated chimney is a metal-sheet
Qichao Hu, Xiaoxin Wang, Ahmed Gamil, Peiwen Li   +3 more
doaj   +1 more source

Spatial and temporal variability of the evaporation duct in the Gulf of Aden

Tellus: Series A, Dynamic Meteorology and Oceanography, 2016
An evaporation duct climatology is constructed for the Gulf of Aden using a 31-year high-resolution data set from the climate reanalysis product National Centers for Environmental Prediction Climate Forecast System Reanalysis.
Qi Zhang, Kunde Yang, Yang Shi
doaj   +1 more source