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An Evaporation Duct Height Prediction Method Based on Deep Learning
IEEE Geoscience and Remote Sensing Letters, 2018An evaporation duct is a particular atmospheric duct that is crucial for marine vessel communication, and one of the most significant indexes to assess it is evaporation duct height (EDH). In this letter, we propose a new method based on a multilayer perceptron (MLP), a classic network in deep learning, to predict the EDH.
Xiaoyu Zhu, Jincai Li, Yinglun Li
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The influence of antenna height on microwave propagation in evaporation duct
Global Oceans 2020: Singapore – U.S. Gulf Coast, 2020In this paper, the influence of antenna height on microwave propagation in evaporation duct is investigated, both from numerical simulation and experimental observation. Comparisons of microwave propagation with different antenna heights under different conditions, such as different evaporation duct heights (EDHs) and signal frequencies, are presented.
Shuwen Wang, Yang Shi, Kunde Yang
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Research on evaporation duct height prediction based on back propagation neural network [PDF]
IET Microwaves, Antennas and Propagation, 2020 Evaporation duct is an abnormal refraction atmospheric stratification frequently appearing at sea. Accurately obtaining evaporation duct height (EDH) is significant for the effective application of electromagnetic system equipment. To overcome the limitations of theoretical prediction models, this study proposes a pure data‐driven back propagation ...
Wenpeng Zhao, Jincai Li, Juan Zhao
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A Fully Coherent Array for Evaporation Duct Height Estimation at Coastal Boundaries
2021 XXXIVth General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS), 2021The Coherent Vertical Array (CoVA) system has been designed to be used during the Coastal Land-Air-Sea Interactions (CLASI) mission for evaporation duct height (EDH) estimation by measuring the grazing angle of the incident, ducted signal. High angular resolution and phase coherence is needed in the CoVA system due to the ducted signal having a narrow ...
Joe Vinci +3 more
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A Passive Technique to Monitor Evaporation Duct Height Using Coastal GNSS-R
IEEE Geoscience and Remote Sensing Letters, 2011We report on a coastal experiment to monitor evaporation duct height (EDH) using GPS-L1 signals scattered from the sea surface. The campaign was carried out in the South China Sea and was focused on the development of an EDH inversion technique. A high-sensitivity delay-mapping receiver was built for this purpose to collect and process direct and ...
Zhensen Wu, Hong-Guang Wang
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Determination of evaporation duct heights by an inverse method
SPIE Proceedings, 2007The detection and tracking of naval targets, including low RCS objects like inflatable boats requires a thorough knowledge of the propagation properties of the maritime boundary layer. Models are in existence, which allow a prediction of the propagation factor using the parabolic equation algorithm.
R. Douvenot +6 more
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Determination of the evaporation duct height from standard meteorological data
Izvestiya, Atmospheric and Oceanic Physics, 2007Four models used for evaluating the height of the evaporation duct from measured atmospheric pressure, water and air temperatures, and air humidity are considered.The calculated results are compared with the duct heights measured during two oceanographic expeditions in the tropical zone of the Atlantic Ocean and the equatorial zone of the Indian Ocean.
V. K. Ivanov +2 more
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Estimating evaporation duct heights from radar sea echo
Radio Science, 2000The evaporation duct is a downward refracting layer that results from the rapid decrease in humidity with respect to altitude occurring in the atmospheric surface layer above bodies of water. The evaporation duct affects radar detection ranges at frequencies of approximately 1 GHz and above.
L. Ted Rogers +2 more
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The short-term forecasting of evaporation duct height (EDH) based on ARIMA model
Multimedia Tools and Applications, 2016The short-term prediction of EDH time series plays an exceedingly important role in several fields such as communications, navigation and so on. In this paper, an application of autoregressive integrated moving average (ARIMA) for short-term forecasting of EDH time series is presented.
Shaobo Yang +5 more
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CASPER West Evaporation Duct Height Inversion Using LATPROP-Radar
2018 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting, 2018Refractive atmospheric conditions at low altitudes can have a significant impact on electromagnetic signal propagation in many maritime environments. For air-sea interaction research, it is crucial to characterize atmosphere boundary layer properties, specifically in this work, by utilizing radar clutter returns caused by electromagnetic ducting ...
Joshua Compalec +8 more
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