Results 11 to 20 of about 1,274 (202)
A New Short-Term Prediction Method for Estimation of the Evaporation Duct Height [PDF]
IEEE Access, 2020 Evaporation duct is a kind of chaotic phenomenon over the ocean. In this paper, a new nonlinear prediction algorithm, the Darwinian evolutionary algorithm (DEA), is introduced to obtain the specific nonlinear formula P(·) of the chaotic phenomenon.
Yanbo Mai +5 more
doaj +4 more sources
Evaporation Duct Height Short-Term Prediction Based on Bayesian Hyperparameter Optimization
AtmosphereAccurately predicting evaporation duct height (EDH) is a crucial technology for enabling over-the-horizon communication and radar detection at sea.
Ye-Wen Wu +5 more
doaj +4 more sources
Estimating Range-Dependent Evaporation Duct Height
Journal of Atmospheric and Oceanic Technology, 2017 The refractivity from clutter (RFC) technique has been proved to be an effective way to estimate atmospheric duct structure. An important issue for RFC is how to make the estimate more robust, especially in range-dependent ducting conditions ...
Bruce M. Howe +3 more
core +2 more sources
Application of the PJ and NPS evaporation duct models over the South China Sea (SCS) in winter.
PLoS ONE, 2017 The detection of duct height has a significant effect on marine radar or wireless apparatus applications. The paper presents two models to verify the adaptation of evaporation duct models in the SCS in winter. A meteorological gradient instrument used to
Shaobo Yang +4 more
doaj +2 more sources
Impact of Typhoon on Evaporation Duct in the Northwest Pacific Ocean
IEEE Access, 2019 Evaporation duct is a layer above the ocean surface due to the inherent humidity inversion at the air-sea boundary layer. The formation of the duct depends on meteorological factors near the ocean surface and is affected by weather process above the ...
Yang Shi +5 more
doaj +3 more sources
Remote Sensing, 2022 The evaporation duct height (EDH) can reflect the main characteristics of the near-surface meteorological environment, which is essential for designing a communication system under this propagation mechanism. This study proposes an EDH prediction network
Cheng Yang, Jian Wang, Yafei Shi
doaj +2 more sources
Atmosphere, 2022 The evaporation duct is a particular type of atmospheric structure that always appears on the open ocean. Predicting the evaporation duct height (EDH) accurately and in a timely manner is of great significance for the practical application of marine ...
Qi Zhang, Xi Chen, Fuyu Yin, Fei Hong
doaj +2 more sources
Evaporation Duct Anomalies Caused by Mesoscale Eddies in the Kuroshio Extension
Geophysical Research LettersEvaporation duct anomalies are always present above various oceanic processes, and their response to ubiquitous mesoscale eddies in the Kuroshio Extension region is quantitatively analyzed for the first time in this study using a synthetic analysis ...
Yuan Gao +5 more
doaj +2 more sources
A New Diagnostic Model and Improved Prediction Algorithm for the Heights of Evaporation Ducts
Frontiers in Earth Science, 2020 This paper develops a new method for the diagnosis and prediction of the evaporation duct heights on the sea, which has certain reference significance for the study of the evaporation ducts.
Yanbo Mai +9 more
doaj +2 more sources
Retrieving evaporation duct heights from measured propagation factors
IET International Conference on Radar Systems 2007, 2007 International audienceThe knowledge of refractivity is very important for coverage prediction. This problem is common above sea, where the particular atmospheric conditions lead to atmospheric ducts which strongly modify the range of the radar compared ...
R. Douvenot +12 more
core +3 more sources