Results 11 to 20 of about 18,997 (237)
Numerical modeling of electromagnetic wave propagation in spatially-varying evaporation duct conditions via 3D parabolic equation method [PDF]
Frontiers in Marine ScienceThis study numerically investigates electromagnetic (EM) wave propagation in spatially-varying evaporation ducts over rough sea surfaces. Conventional two-dimensional (2D) models assume homogeneous refractive index distribution along the cross-range ...
Hanjie Ji +9 more
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Maritime Communication in Evaporation Duct Environment With Ship Trajectory Optimization [PDF]
IEEE Transactions on Vehicular TechnologyIn maritime wireless networks, the evaporation duct effect has been known as a preferable condition for long-range transmissions. However, how to effectively utilize the duct effect for efficient communication design is still open for investigation. In this paper, we consider a typical scenario of ship-to-shore data transmission, where a ship collects ...
Gao, Ruifeng +7 more
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Transhorizon radiowave propagation due to evaporation ducting
Resonance, 2006 A detailed description of evaporation ducts and their relevance to radiowave propagation over the sea has been presented. The constantly changing weather conditions over the sea mean that marine and coastal environments, in particular, are prone to these unusual tropospheric phenomena that facilitate radio waves to have higher signal strengths and to ...
Gunashekar, S. D. +2 more
openaire +4 more sources
A New Model of the Oceanic Evaporation Duct [PDF]
Journal of Applied Meteorology, 1997 Failure to consider anomalous propagation of microwave radiation in the troposphere may result in erroneous meteorological radar measurements. The most commonly occurring anomalous propagation phenomenon over the ocean is the evaporation duct. The height of this duct is dependent on atmospheric variables and is a major input to microwave propagation ...
Steven M. Babin +2 more
openaire +3 more sources
Near-Surface Thermodynamic Influences on Evaporation Duct Shape
AtmosphereThis 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 +3 more
doaj +2 more sources
EDH-STNet: An Evaporation Duct Height Spatiotemporal Prediction Model Based on Swin-Unet Integrating Multiple Environmental Information Sources [PDF]
Remote SensingGiven the significant spatial non-uniformity of marine evaporation ducts, accurately predicting the regional distribution of evaporation duct height (EDH) is crucial for ensuring the stable operation of radio systems.
Hanjie Ji +5 more
doaj +2 more sources
Remote Sensing, 2023 The propagation of electromagnetic waves beyond the line of sight can be caused by atmospheric ducts, which are significant concerns in the fields of radar and communication.
Ning Yang, Debin Su, Tao Wang
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Hybrid Satellite-Terrestrial Communication Networks for the Maritime Internet of Things: Key Technologies, Opportunities, and Challenges [PDF]
, 2021 With the rapid development of marine activities, there has been an increasing number of maritime mobile terminals, as well as a growing demand for high-speed and ultra-reliable maritime communications to keep them connected.
Chen, Yunfei +5 more
core +2 more sources
Deep Learning Method for Evaporation Duct Inversion Based on GPS Signal
Atmosphere, 2022 Accurate evaporation duct prediction is one of the critical technologies for realizing the over-the-horizon impact of marine communication, ship radar, and other systems.
Ming-Yu Cui, Yu Zhang
doaj +1 more source
Frontiers in Marine Science, 2023 Maritime high-speed over-the-horizon wireless communication is realizable through evaporation ducts. Detailed measurement, analysis, and modeling of duct channels are essential for application of this communication technique.
Shuwen Wang +21 more
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