Results 1 to 10 of about 1,274 (202)

Evaporation Duct Height Nowcasting in China’s Yellow Sea Based on Deep Learning [PDF]

Remote Sensing, 2021
The evaporation duct is a weather phenomenon that often occurs in marine environments and affects the operation of shipborne radar. The most important evaluation parameter is the evaporation duct height (EDH).
Jie Han, Jia-Ji Wu, Qing-Lin Zhu, Hong-Guang Wang, Yu-Feng Zhou, Ming-Bo Jiang, Shou-Bao Zhang, Bo Wang   +7 more
doaj   +5 more sources

LGB-PHY: An Evaporation Duct Height Prediction Model Based on Physically Constrained LightGBM Algorithm

Remote Sensing, 2022
The evaporation duct is a special atmospheric stratification that significantly influences the propagation path of electromagnetic waves at sea, and hence, it is crucial for the stability of the radio communication systems.
Xingyu Chai, Jincai Li, Jun Zhao, Wuxin Wang, Xiaofeng Zhao   +4 more
doaj   +5 more sources

Time Series Analysis of Evaporation Duct Height over South China Sea: A Stochastic Modeling Approach

Atmosphere, 2021
The evaporation duct could significantly affect the work status of maritime microwave communication systems in the South China Sea. Therefore, the exact forecasting of the evaporation duct is vital for the normal operation of the systems.
Fei Hong, Qi Zhang
doaj   +4 more sources

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

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   +3 more sources

Research on a Multimodel Fusion Diagnosis Method for Evaporation Ducts in the East China Sea [PDF]

Sensors, 2023
Evaporation ducts are abnormal states of the atmosphere in the air–sea boundary layer that directly affect the propagation trajectory of electromagnetic (EM) waves.
Cheng Zhang, Zhijin Qiu, Chen Fan, Guoqing Song, Bo Wang, Tong Hu, Jing Zou, Zhiqian Li, Sheng Wu   +8 more
doaj   +3 more sources

The Inhomogeneous Characteristics of Evaporation Ducts in the Northern South China Sea Based on Information Entropy [PDF]

Entropy
The inhomogeneity of the evaporation duct significantly influences electromagnetic propagation. Based on observation data from four buoy stations in the northern South China Sea (SCS) and European Centre for Medium-Range Weather Forecasts (ECMWF) data ...
Ning Yang, Debin Su, Yuduo Feng, Tao Wang   +3 more
doaj   +2 more sources

EDH-STNet: An Evaporation Duct Height Spatiotemporal Prediction Model Based on Swin-Unet Integrating Multiple Environmental Information Sources

Remote Sensing
Given 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, Lixin Guo, Jinpeng Zhang, Yiwen Wei, Xiangming Guo, Yusheng Zhang   +5 more
doaj   +4 more sources

Near-Surface Thermodynamic Influences on Evaporation Duct Shape

Atmosphere
This 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, Daniel P. Greenway, Tracy Haack, Erin E. Hackett   +3 more
doaj   +4 more sources

The Preliminary Investigation of Communication Characteristics Using Evaporation Duct across the Taiwan Strait

Journal of Marine Science and Engineering, 2022
Affected by the Taiwan Strait Warm Current, the evaporation intensity around the Taiwan Strait is significantly higher than in other southern and eastern coastal areas of China.
Cheng Yang, Yafei Shi, Jian Wang
doaj   +2 more sources

The Effect of Boreal Summer Intraseasonal Oscillation on Evaporation Duct and Electromagnetic Propagation over the South China Sea

Atmosphere, 2020
Intraseasonal oscillation of the evaporation duct, lasting 30–60 days, has been identified over the South China Sea (SCS) summer monsoon region based on multiple reanalyses and observational data.
Wentao Jia, Weimin Zhang, Jiahua Zhu, Jilin Sun   +3 more
doaj   +2 more sources