Results 31 to 40 of about 380 (139)

Comparative Study on Chaos Identification of Ionospheric Clutter From HFSWR

open access: yesIEEE Access, 2019
In addition to target echoes, high frequency surface wave radar (HFSWR) receives sea and ionospheric clutter. Among these clutters, the ionospheric clutter is dominant and significantly affects the detection performance of HFSWR, particularly when the ...
Lyu Zhe   +4 more
doaj   +1 more source

Propagation modeling and path loss prediction tools for high frequency surface wave radars [PDF]

open access: yes, 2010
Propagation modeling and simulation approaches for the use of High Frequency Surface Wave Radar (HFSWR) are discussed. HFSWR uses vertically polarized surface waves along multi-mixed paths in the lower HF band (3 MHz - 15 MHz).
Apaydın, Gökhan, Sevgi, Levent
core   +1 more source

Vessel Target Echo Characteristics and Motion Compensation for Shipborne HFSWR under Non-Uniform Linear Motion

open access: yesRemote Sensing, 2021
For shipborne high-frequency surface wave radar (HFSWR), the movement of the ship has a great impact on the radar echo, thus affecting target detection performance.
Yonggang Ji   +6 more
doaj   +1 more source

A High-Frequency Surface Wave Radar Simulation Using FMCW Technique for Ship Detection [PDF]

open access: yes, 2020
Indonesia is an archipelagic country with a vast sea area. This vast sea area becomes a challenge in conducting regional surveillance to maintain maritime conditions.
Haqqoni, Ahmad Fauzi   +3 more
core   +2 more sources

Radar cross-section (RCS) analysis of high frequency surface wave radar targets [PDF]

open access: yes, 2010
Realistic high frequency surface wave radar (HFSWR) targets are investigated numerically in terms of electromagnetic wave - target interactions. Radar cross sections (RCS) of these targets are simulated via both the finite-difference time-domain (FDTD ...
Sevgi, Levent, Çakır, Gonca
core   +1 more source

Повышение эффективности обнаружения загоризонтными РЛС с поверхностной волны надводных объектов на основе синтеза апертуры антенной системы [PDF]

open access: yes, 2021
Nowadays, over-the-horizon surface wave radars are used to solve the problems of monitoring the situation on the water surface adjacent to the border areas of the land. The main advantage of these means is the ability to detect surface objects beyond the
Алёшкин, Андрей Петрович   +3 more
core   +4 more sources

Stationary Time Statistical Property of Ionospheric Clutter in High-Frequency Surface-Wave Radar

open access: yesJournal of Electrical and Computer Engineering, 2019
In HFSWR (high-frequency surface-wave radar) system, the detection performance is impacted seriously by ionospheric clutter. Frequency selection is an effective method to avoid the effect of ionospheric clutter.
Shang Shang   +3 more
doaj   +1 more source

Introduction to Coastal HF Maritime Surveillance Radars

open access: yesPolish Maritime Research, 2019
This paper presents the main technical characteristics and working performances of coastal maritime surveillance radars, such as low-power High-Frequency Surface Wave Radars (HFSWR) and Over the Horizon Radars (OTHR). These radars have demonstrated to be
Ilcev Dimov Stojce
doaj   +1 more source

A Motion Compensation Method for Shipborne HFSWR by Using Dual Reference RF Signals Generated Onshore

open access: yesRemote Sensing, 2022
The echo of shipborne high-frequency surface wave radar (HFSWR) is modulated by six-degrees-of-freedom (6-DOF) motion, affecting the detection of the target and the remote sensing of ocean surface dynamics parameters.
Maorong Chen   +6 more
doaj   +1 more source

Sense, enrich and classify: The scanmaris workshop for assessment of vessel's abnormal behavior in the EEZ [PDF]

open access: yes, 2008
International audienceConstant monitoring of the Exclusive Economic Zone cannot be performed only using high performance sensors. On the one hand, all available information on the observed area as juridical history of vessels or delineation of fishing ...
Giraud, Marie-Annick   +5 more
core   +3 more sources

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