Results 11 to 20 of about 2,709 (248)

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   +2 more sources

UAV-aided maritime communication over the Pacific Ocean using the elevated duct toward future wireless networks [PDF]

Scientific Reports
To bolster long-range maritime communication, unmanned aerial vehicle (UAV)-aid communications have garnered increased attention as traditional maritime communication solutions face challenges from geographical and meteorological factors. This work first
Jian Wang, Wenlu Liu, Cheng Yang
doaj   +2 more sources

Investigating the spatio–temporal characteristics of lower atmospheric ducts across the China seas by performing a long–term simulation using the WRF model

Frontiers in Marine Science
In this work, a diagnostic scheme for lower atmospheric ducts was established based on the Weather Research and Forecasting (WRF) model. More specifically, a 10-year simulation test was conducted for the China seas to investigate the spatio-temporal ...
Qi Liu, Xiaofeng Zhao, Jing Zou, Tong Hu, Zhijin Qiu, Bo Wang, Zhiqian Li, Chaoran Cui, Rui Cao   +8 more
doaj   +3 more sources

Investigating the Temporal and Spatial Characteristics of Lower Atmospheric Ducts in the Arctic via Long-Term Numerical Simulations

Atmosphere
In this study, a diagnostic model for lower atmospheric ducts was developed using the polar weather research and forecasting model. A five-year simulation was then conducted across the entire Arctic region to investigate the temporal and spatial ...
Jinyue Wang, Xiaofeng Zhao, Jing Zou, Pinglv Yang, Bo Wang, Shuai Yang, Zhijin Qiu, Zhiqian Li, Tong Hu, Miaomiao Song   +9 more
doaj   +3 more sources

Development of a Numerical Prediction Model for Marine Lower Atmospheric Ducts and Its Evaluation across the South China Sea

Journal of Marine Science and Engineering
The Coupled Ocean–Atmosphere–Wave–Sediment Transport (COAWST) model serves as the foundation for creating a forecast model to detect lower atmospheric ducts in this study.
Qian Liu, Xiaofeng Zhao, Jing Zou, Yunzhou Li, Zhijin Qiu, Tong Hu, Bo Wang, Zhiqian Li   +7 more
doaj   +3 more sources

Validation of atmospheric evaporation duct in the eastern Indian Ocean

Frontiers in Earth Science
An atmospheric duct is an anomalous atmospheric structural phenomenon that causes trap refraction in the troposphere to change the propagation paths and ranges of electromagnetic waves, thereby increasing the detection distances of radar and other ...
Zhe Qi, Zhe Qi, Huabin Mao, Huabin Mao, Chunhua Qiu, Yongfeng Qi, Yongfeng Qi   +6 more
doaj   +2 more sources

Arctic Atmospheric Ducting Characteristics and Their Connections with Arctic Oscillation and Sea Ice

Atmosphere, 2022
Atmospheric ducting is an anomalous atmospheric structure that affects electromagnetic wave propagation. In the context of global warming, the navigation capacity of the Arctic is increased, and the atmospheric duct can affect communication and ...
Ting Qin, Bo Su, Li Chen, Junfeng Yang, Hulin Sun, Jing Ma, Wenhao Yu   +6 more
doaj   +1 more source

Deep learning for classifying and characterizing atmospheric ducting within the maritime setting [PDF]

Computers & Geosciences, 2021
Real-time characterization of refractivity within the marine atmospheric boundary layer can provide valuable information that can potentially be used to mitigate the effects of atmospheric ducting on radar performance. Many duct characterization models are successful at predicting parameters from a specific refractivity profile associated with a given ...
Hilarie Sit, Christopher J. Earls
openaire   +2 more sources

Low-Level Atmospheric Ducts [PDF]

Nature, 1948
DURING 1943-46, the Signals Research and Development Establishment operated a series of experimental centimetre-wave radio links along a 60-mile oversea path across Cardigan Bay. One major purpose of the investigation, which was carried out for an inter-Service committee under the chairmanship of Sir Edward Appleton, was to determine the degree to ...
J. S. MCPETRIE, B. STARNECKI
openaire   +1 more source

Spatiotemporal Distribution of Atmospheric Ducts in Alaska and Its Relationship with the Arctic Vortex

International Journal of Antennas and Propagation, 2020
In this paper, global position system high-resolution sounding data from 1998 to 2008 were used to statistically analyze the spatiotemporal distribution and determine the probability, thickness, and intensity of atmospheric ducts at 12 stations in Alaska.
Yanbo Mai, Zheng Sheng, Hanqing Shi, Qixiang Liao, Wei Zhang   +4 more
doaj   +1 more source