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Frontiers in Environmental Science, 2022 Atmospheric duct is an anomalous atmospheric structure that affects electromagnetic wave propagation. The important characteristics of the atmospheric ducts include duct probability, duct height, duct strength, and the thickness of the trapping layer. To
Lang Huang, Xiaofeng Zhao, Yudi Liu
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Low-Level Atmospheric Ducts [PDF]
Nature, 1948 DURING 1943-46, the Signals Research and Development Establishment operated a series of experimental centimetre-wave radio links along a 60-mile oversea path across Cardigan Bay. One major purpose of the investigation, which was carried out for an inter-Service committee under the chairmanship of Sir Edward Appleton, was to determine the degree to ...
J. S. MCPETRIE, B. STARNECKI
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Deep learning for classifying and characterizing atmospheric ducting within the maritime setting [PDF]
Computers & Geosciences, 2021 Real-time characterization of refractivity within the marine atmospheric boundary layer can provide valuable information that can potentially be used to mitigate the effects of atmospheric ducting on radar performance. Many duct characterization models are successful at predicting parameters from a specific refractivity profile associated with a given ...
Hilarie Sit, Christopher J. Earls
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Utö Observatory for Analysing Atmospheric Ducting Events over Baltic Coastal and Marine Waters
Remote Sensing, 2023 Maritime safety relies on navigation, detection, and radio communication technologies that function through electromagnetic radiation. Propagation of electromagnetic radiation can be impacted by a disruptive phenomenon known as ducting.
Laura Rautiainen +10 more
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Remote Sensing, 2022 The atmospheric duct (AD) is an anomalous structure in which electromagnetic waves can make transhorizon propagation. ADs often occur in the formation, development and disappearance of tropical cyclones (TCs). In this work, the eXtreme Gradient Boosting (
Lang Huang +3 more
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A hybrid finite element approach to modeling sound radiation from circular and rectangular ducts [PDF]
, 2012 This is the post-print version of the Article - Copyright @ 2012 Acoustical Society of AmericaA numerical model based on a hybrid finite element method is developed that seeks to join sound pressure fields in interior and exterior regions.
Wenbo Duan, Kirby, R, Ray Kirby, Duan, W
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On acoustic propagation in three-dimensional rectangular ducts with flexible walls and porous linings [PDF]
, 2012 This is the post-print version of the Article. The official published version can be accessed from the links below - Copyright @ 2012 Acoustical Society of AmericaThe focus of this article is toward the development of hybrid analytic-numerical mode ...
Lawrie, JB, Jane B. Lawrie
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University of Arizona, Institute of Atmospheric Physics, Progress Report No. 2
, 1955 This title from the Institute of Atmospheric Physics Reports collection is made available by the Department of Hydrology & Atmospheric Sciences and the University Libraries, University of Arizona.
Braham, Roscoe R., Jr.
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Weight Loss Function for the Cooperative Inversion of Atmospheric Duct Parameters
Atmosphere, 2022 Low-altitude atmospheric ducts are abnormal atmospheric phenomena in the troposphere, impacting the operation of microwave or ultrashort wave radio systems.
Jie Han +7 more
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Inverse modeling of European CH4 emissions: sensitivity to the observational network [PDF]
, 2009 Inverse modeling is widely employed to provide “top-down” emission estimates using atmospheric measurements. Here, we analyze the dependence of derived CH4 emissions on the sampling frequency and density of the observational surface network, using the ...
Bergamaschi, P. +9 more
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