Results 21 to 30 of about 2,709 (248)
Utö Observatory for Analysing Atmospheric Ducting Events over Baltic Coastal and Marine Waters
Remote Sensing, 2023 Maritime safety relies on navigation, detection, and radio communication technologies that function through electromagnetic radiation. Propagation of electromagnetic radiation can be impacted by a disruptive phenomenon known as ducting.
Laura Rautiainen +10 more
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Remote Sensing, 2022 The atmospheric duct (AD) is an anomalous structure in which electromagnetic waves can make transhorizon propagation. ADs often occur in the formation, development and disappearance of tropical cyclones (TCs). In this work, the eXtreme Gradient Boosting (
Lang Huang +3 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
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Modeling the Development of Plasmasphere Ducts and Irregularities With SAMI3/WACCM‐X
Geophysical Research Letters, 2023 We show that atmospheric gravity waves can generate plasma ducts and irregularities in the plasmasphere using the coupled SAMI3/WACCM‐X model. We find the equatorial electron density is irregular as a function of longitude which is consistent with CRRES ...
J. D. Huba, H.‐L. Liu
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Remote Sensing, 2021 The anomalous propagation conditions, particularly the tropospheric ducts, severely impact the regular operation and performance evaluation of radio devices in the atmospheric boundary layer.
Xiaozhou Liu +3 more
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Multiscale Decomposition Prediction of Propagation Loss in Oceanic Tropospheric Ducts
Remote Sensing, 2021 The oceanic tropospheric duct is a structure with an abnormal atmospheric refractive index. This structure severely affects the remote sensing detection capability of electromagnetic systems designed for an environment with normal atmospheric refraction.
Mingxia Dang +6 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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Ducting Approach to Atmospheric Sound Propagation [PDF]
The Journal of the Acoustical Society of America, 1969 The velocity profile V=V0/1+Az+Bz2)12 is investigated for nonfocus situations. When A is negative, sound rays are refracted back to the ground and are reflected. When A is positive, sound rays are refracted away from the ground and a shadow zone is formed.
openaire +1 more source
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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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 +9 more
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