Results 31 to 40 of about 293,197 (180)

Evaporation duct effects on sea clutter [PDF]

IEEE Transactions on Antennas and Propagation, 1990
Existing sea clutter models are in general agreement on the trends and magnitudes of sea reflectivity at low (1 degrees -10 degrees ) grazing angles. However, at extremely low grazing angles ( >
openaire   +2 more sources

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

Detection system of evaporation duct based on iron tower platform.

, 2017
Detection system of evaporation duct based on iron tower platform.
Chao Wu (199897), Xin He (48101), Shaobo Yang (1966123), Xingfei Li (1966126), Ying Zhong (286618)   +4 more
core   +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  

Retrieving evaporation duct heights from measured propagation factors

, 2007
International audienceThe 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 ...
R. Douvenot, H. Essen, Y. Hurtaud, Essen, H., Douvenot, Rémi, Saillard, Joseph, V. Fabbro, C. Bourlier, Fuchs, H.-H., H.H. Fuchs, Bourlier, Christophe, Fabbro, Vincent, J. Saillard   +12 more
core   +1 more source

Novel Antenna Design Suitable For Evaporation Duct [PDF]

, 2014
This project investigates a design of antenna array that might be suitable for implementation in the evaporation duct. The design investigates a novel horn antenna array that can produce high gain over a narrow beam width.
Youssef Rezk, Youssef Ahmed
core  

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

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   +1 more source

On the Possibility of Detecting Evaporation Ducts Through GNSS Reflectometry

Remote Sensing
An evaporation duct is a kind of atmospheric event with a refractive index exceeding the curvature of the Earth, which mostly exists on the ocean surface.
Fu Li, Yueqiang Sun, Xianyi Wang, Junming Xia, Feixiong Huang, Qifei Du, Weihua Bai, Zhuoyan Wang, Tongsheng Qiu   +8 more
doaj   +1 more source

Statistical Analysis of the Quantified Relationship between Evaporation Duct and Oceanic Evaporation for Unstable Conditions

, 2017
An analysis is conducted for the first time to statistically quantify the relationship between the evaporation duct and oceanic evaporation. Through sensitivity analysis, under unstable conditions (air–sea temperature difference less than zero ...
Qi Zhang, Qiulong Yang, Kunde Yang
core   +1 more source

XGB Model : Research on Evaporation Duct Height Prediction Based on XGBoost Algorithm [PDF]

Radioengineering, 2020
Evaporation duct is a specific atmospheric structure at sea, which has an important influence on the propagation path of electromagnetic waves (EW).
W. P. Zhao, J. Li, J. Zhao, D. Zhao, J. Lu, X. Wang   +5 more
doaj