Remote sensing of surface currents and waves by the HF radar WERA

Gurgel, Klaus-Werner; Antonischki, G.

doi:10.1049/cp:19970686

Cited by 15 publications

(5 citation statements)

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“…These spectra are given for all points of the 2 km × 2 km regular grid (5440 points) after using beam forming calculation. The spectra are used to extract sea surface currents, significant wave height, and wind direction, calculated by algorithms developed at the University of Hamburg [2], [3]. Sea surface current data extracted from the radars were compared with other data sources: acoustic profilers installed by the French Navy [Service Hydrographique et Océanographique de la Marine (SHOM)] and numerical data simulated by the Mars-2-D model from the Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER).…”

Section: Methodsmentioning

confidence: 99%

Sea Surface Current–Wave–Wind Interactions Measured by Coastal Ground Wave HF Radars

Cochin

Mariette²,

Garello³

2008

IEEE Geosci. Remote Sensing Lett.

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The performance and operational feasibility of the high-frequency Wellen Radar Doppler radar have been demonstrated in a region dominated by strong tidal currents during the SURveillance LITtorale OPérationnelle experiment in Brittany (France). Local weather-oceanic phenomena (wind-wave-current interactions) were measured for the first time by temporal-spatial analyses of the sea surface current measurements, sea surface current spatial gradient, and significant wave heights under conditions of spring tides and current mainly in the wind direction. The results, showing a variation of wave height with the tidal cycle, are presented in this letter.Index Terms-High-frequency (HF) ground wave Doppler radar, sea state, sea surface currents, wind-wave-current interactions.

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Section: Methodsmentioning

confidence: 99%

Sea Surface Current–Wave–Wind Interactions Measured by Coastal Ground Wave HF Radars

Cochin

Mariette²,

Garello³

2008

IEEE Geosci. Remote Sensing Lett.

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“…Barrick 7 mathematically related the second order Doppler spectra to the ocean wave spectrum and HF radars were developed to provide measurements of the sea state. These included the phased array Pisces radar developed in the UK in the late eighties 24 and the WERA, developed by the University of Hamburg 25,26 which can be arranged for direction finding or phased array measurements.…”

Section: Hf Radarmentioning

confidence: 99%

A two year comparison between HF radar and ADCP current measurements in Liverpool Bay

Robinson

Wyatt

Howarth

2011

Journal of Operational Oceanography

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“…One class is the phased array system. An example of a phased array system is the WERA with a linear receiving antenna array developed by the University of Hamburg [12,13]. WERA was designed to allow for a wide range of working frequencies, spatial resolutions, and antenna configurations.…”

Section: Introductionmentioning

confidence: 99%

Improving Ship Detection in Clutter-Edge and Multi-Target Scenarios for High-Frequency Radar

et al. 2021

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As one of the main sensors for continuous maritime measurements of sea state parameters, high-frequency surface wave radar (HFSWR) also plays an important role in ship detection and tracking. Compact HFSWR often suffers from missing targets, especially when the target appears near the Doppler region with heavy sea clutter or near another target in a multi-target scenario. To address this problem, an automatic ship detection method based on time–frequency (TF) analysis is presented in this paper. The TF target ridge areas are extracted in the TF image via the eigenvalues of the Hessian matrix, image edge detection, and local maximum search. Then, whether ship signals exist in the TF ridges or not is decided by a decision threshold that is calculated by fitting the probability distribution function (PDF) of sea clutter in the TF domain. The proposed TF method can separate TF ridges of similar Doppler frequency and performs constant false alarm rate (CFAR) detection for TF targets, which facilitates detecting these targets that are masked by sea clutter and other large targets. Experimental results show that the number of detected ships that match with the automatic identification system (AIS) records is four times more than that obtained by the conventional constant false alarm rate (CFAR) detectors and 1.3 times more than that by the state-of-the-art TF method in consideration of approximately the same number of detected targets.

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Remote sensing of surface currents and waves by the HF radar WERA

Cited by 15 publications

References 0 publications

Sea Surface Current–Wave–Wind Interactions Measured by Coastal Ground Wave HF Radars

Sea Surface Current–Wave–Wind Interactions Measured by Coastal Ground Wave HF Radars

A two year comparison between HF radar and ADCP current measurements in Liverpool Bay

Improving Ship Detection in Clutter-Edge and Multi-Target Scenarios for High-Frequency Radar

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