Results 11 to 20 of about 805,540 (271)
Experimental Analysis of Atmospheric Ducts and Navigation Radar Over-the-Horizon Detection
Remote Sensing, 2022 Since the height of sea detection radar antenna and ship targets is relatively low, it is generally believed that its over-the-horizon detection is mainly caused by the evaporation duct at sea.
Li-Feng Huang +7 more
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Validation of atmospheric evaporation duct in the eastern Indian Ocean [PDF]
Frontiers in Earth ScienceAn 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 +6 more
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Remote Sensing, 2022 Atmospheric duct parameters inversion is an important aspect of microwave-band radar and communication system performance evaluation. AIS (Automatic Identification System) is one of the signal sources used for atmospheric duct parameters inversion ...
Jie Han +7 more
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Remote Sensing, 2023 Using intelligent optimization algorithms to retrieve atmospheric duct parameters by monitoring automatic identification system (AIS) signals at sea is a new passive remote sensing technology for atmospheric ducts.
Li-Feng Huang +7 more
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Weight Loss Function for the Cooperative Inversion of Atmospheric Duct Parameters
Atmosphere, 2022 Low-altitude atmospheric ducts are abnormal atmospheric phenomena in the troposphere, impacting the operation of microwave or ultrashort wave radio systems.
Jie Han +7 more
doaj +4 more sources
Arctic, Antarctic, and Alpine Research, 2022 Atmospheric ducts could disturb radar detection and radio communication in the Arctic and risk increasing human activities under Arctic warming. It is an urgent need to understand atmospheric ducts in the Arctic, with distinct atmospheric systems and ...
Jinhuan Zhu +6 more
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Remote Sensing, 2023 The propagation of electromagnetic waves beyond the line of sight can be caused by atmospheric ducts, which are significant concerns in the fields of radar and communication.
Ning Yang, Debin Su, Tao Wang
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A Random Forest Algorithm Combined with Bayesian Optimization for Atmospheric Duct Estimation
Remote Sensing, 2023 Inversion of atmospheric ducts is of great importance in the field of performance evaluation for radar and communication systems. Since the model parameters in machine learning play a crucial role in prediction performance, this paper develops a random ...
Chao Yang +4 more
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Atmospheric Ducting Effect in Wireless Communications: Challenges and Opportunities [PDF]
Journal of Communications and Information Networks, 2021 Atmospheric ducting has a significant impact on electromagnetic wave propagation. Radio signals that are trapped and guided by the atmospheric duct can travel a much longer distance over the horizon with lower attenuation since the signal power does not spread isotropically through the atmosphere.
Fangfang Liu 0008 +3 more
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The Statistical Characteristics of Atmospheric Ducts Observed Over Stations in Different Regions of American Mainland Based on High-Resolution GPS Radiosonde Soundings [PDF]
Frontiers in Environmental Science, 2022 Atmospheric duct is an anomalous atmospheric structure that affects electromagnetic wave propagation. The important characteristics of the atmospheric ducts include duct probability, duct height, duct strength, and the thickness of the trapping layer. To
Lang Huang, Xiaofeng Zhao, Yudi Liu
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