Results 51 to 60 of about 380 (139)
Canadian Journal of Remote Sensing, 2001 RESUMELa Convention des Nations Unies sur la Loi de la Mer (CNULM) accorde la souverainete sur une zone de 200 milles nautiques (mn) en mer designee sous l'appellation de Zone economique exclusive (ZEE). En contrepartie, les nations doivent etablir et assurer la gestion, l'application de la loi et la protection de l'environnement dans cette nouvelle ...
openaire +1 more source
Robustness of a correction method applied to a vertically deformed HFSWR on buoys [PDF]
, 2009 International audienceThis paper presents two correction methods for vertical deformations of the receiving array belonging to HFSWR on buoys. The method inspired from Schelkunoff's representation is more robust to the deformation's uncertainty ...
Bourges, Anthony +4 more
core +5 more sources
Deghosting method for cross localization in distributed high frequency surface wave radar
The Journal of Engineering, Volume 2024, Issue 11, November 2024.To address the ghosts emerging during the cross localization in a novel distributed high frequency surface wave system, a multi‐stage deghosting method is utilized, which is based on the geometric characteristics, the velocity features, and the motion features of the targets across multiple frames.
Na Cui, Xuekun Chen, Changjun Yu
wiley +1 more source
DOA estimation with extended sparse and parametric approach in multi‐carrier MIMO HFSWR
The Journal of Engineering, Volume 2019, Issue 21, Page 7810-7814, November 2019., 2019 To obtain a higher angle resolution of multiple‐in multiple‐out high‐frequency surface wave radar (MIMO HFSWR) for direction of arrival (DOA) estimation with a limited number of antenna sensors, multiple working frequencies are proposed to enlarge the aperture of the virtual array of the MIMO HFSWR.
Aihua Liu +3 more
wiley +1 more source
Array self‐calibration for sky‐wave over‐the‐horizon radar with gain‐phase errors
The Journal of Engineering, Volume 2019, Issue 19, Page 6192-6195, October 2019., 2019 This study proposes a novel algorithm for sky‐wave over‐the‐horizon (OTH) radar array self‐calibration with angle‐independent gain‐phase errors. The proposed method exploits backscattered echo from an ionised meteor trail, which can be considered as disjoint sources of opportunity for their spatial and temporal fluctuations during coherent processing ...
Baiqiang Zhang, Junhao Xie
wiley +1 more source
Remote Sensing, 2023 Due to its maneuverability and agility, the shipborne high-frequency surface wave radar (HFSWR) provides a new way of monitoring large-area marine dynamics and environment information.
Yunfeng Zhang +3 more
doaj +1 more source
Space-time Characteristics and Experimental Analysis of Broadening First-order Sea Clutter in HF Hybrid Sky-surface Wave Radar [PDF]
, 2014 In high frequency (HF) hybrid sky-surface wave radar, the first-order sea clutter broadening is very complex and serious under the influence of ionosphere and bistatic angle, which affects the detection of ship target.
Chu, T.Q. +4 more
core +1 more source
A Novel Data-Driven Modeling Method For The Spatial-Temporal Correlated Complex Sea Clutter [PDF]
, 2022 The sea clutter, referred to as the time-varying radar backscatter from the ocean surface, plays a significant role in marine radar development. The ocean\u27s complex hydrodynamics cause it to exhibit non-Gaussian and nonstationary characteristics ...
Ewe, Hong Tat +2 more
core +2 more sources
International Journal of Antennas and Propagation, Volume 2024, Issue 1, 2024.The extraction algorithm of target characteristics resonance set at the high‐frequency band plays a significant role in defense applications like early warning. The paper proposes a new method to extract the characteristic resonance set of radar targets in the resonance frequency region using an autoregressive moving average model optimized by root ...
Sang Zhou +3 more
wiley +1 more source
Miniaturisation of high‐frequency SURFACE wave radar transmitting antenna
The Journal of Engineering, Volume 2019, Issue 19, Page 6222-6225, October 2019., 2019 Antennas operating in the high‐frequency (HF) bands are generally relatively large in size, which severely limits the application of the antennas. Therefore, miniaturisation of the antenna is necessary. Here, a dual‐folded structure Yagi antenna is designed for HF surface wave radar (SWR).
Hong‐Bo Li, Yang Song, Chang‐Jun Yu
wiley +1 more source