Results 31 to 40 of about 1,178,019 (215)

A Novel System for the Measurement of an Evaporation Duct Using the Magnetic Coupling Principle for Power Feeding and Data Transmission

Sensors, 2022
Since the evaporation duct height (EDH) only covers the antenna height of most shipborne microwave radars, mastering the EDH in advance has great significance in achieving long-range target detection.
Qiang Wang, Xingfei Li, Hongyu Li, Shaobo Yang, Shizhong Yang, Linlin Ma, Jingbo Zhao   +6 more
doaj   +1 more source

An Evaporation Duct Height Estimation Algorithm Based on Deep Neural Networks

Journal of Physics: Conference Series, 2022
Abstract In order to solve the problem of the evaporation duct height (EDH) estimation, focusing on the propagation loss (PL) features with different EDHs, this paper proposes an evaporation duct height estimation method based on Deep Neural Networks (DNN). The theoretical basis is Universal Approximation Theorem.
Yilin Jiang, Xin Yao, Yuxin Zhang
openaire   +1 more source

Regional Spatiotemporal Statistical Database of Evaporation Ducts Over the South China Sea For Future Long-Range Radio Application

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2022
To fully grasp the characteristics and provide a basis for establishing an evaporation duct communication system for the South China Sea (SCS), we constructed a regional statistical database based on remote sensing meteorological parameters and a ...
Cheng Yang, Yafei Shi, Jian Wang, Feng Feng   +3 more
doaj   +1 more source

Long-term over-the-horizon microwave channel measurements and statistical analysis in evaporation ducts over the Yellow Sea

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, Shuwen Wang, Shuwen Wang, Kunde Yang, Kunde Yang, Kunde Yang, Yang Shi, Yang Shi, Hao Zhang, Hao Zhang, Fan Yang, Fan Yang, Fan Yang, Dawei Hu, Dawei Hu, Dawei Hu, Guoyu Dong, Guoyu Dong, Guoyu Dong, Yihang Shu, Yihang Shu, Yihang Shu   +21 more
doaj   +1 more source

MACHINE LEARNING APPROACH FOR EVAPORATION DUCT NOWCAST [PDF]

, 2021
The Evaporation Duct Height (EDH) and Strength (EDS) are properties of the evaporation duct that affects electromagnetic (EM) signal propagation close to the air-sea interface.
Yanez, Josue F.
core   +2 more sources

Analysis of the accuracy of using ERA5 reanalysis data for diagnosis of evaporation ducts in the East China Sea

Frontiers in Marine Science, 2023
Evaporation ducts are a phenomenon that occurs with extremely high frequency at the boundary between the atmosphere and the ocean. Because they directly affect the propagation of electromagnetic waves, it is necessary to study their various ...
Zhijin Qiu, Zhijin Qiu, Cheng Zhang, Cheng Zhang, Bo Wang, Tong Hu, Jing Zou, Zhiqian Li, Shizhe Chen, Sheng Wu   +9 more
doaj   +1 more source

Exploring Relationships of Evaporation Duct Height with Wind Speed and Humidity

, 2023
Changes in humidity near the ocean surface can produce a phenomenon called evaporation ducts, which are nearly permanent features within the marine atmospheric surface layer (first ~100 m above the ocean surface).
Vaughan, Alexis
core  

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

Retrieving evaporation duct heights from measured propagation factors

, 2022
S.611-615The 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 to the ...
Douvenot, R., Bourlier, C., Fabbro, V., Fuchs, H.-H., Hurtaud, Y., Saillard, J., Essen, H.   +6 more
core  

Analysis and Research on Chaotic Dynamics of Evaporation Duct Height Time Series with Multiple Time Scales

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   +1 more source