Detection of Vessel Targets in Sea Clutter Using In Situ Sea State Measurements With HFSWR

The detection of vessel targets could be effectively resolved in a high-frequency surface wave radar (HFSWR). However, signals reflected from vessels are concealed by sea clutter in the Doppler spectrum, where such detections are performed. Consequently, differences between these features in the Doppler domain cannot be readily observed, which greatly increases the difficulty in detecting vessel targets. In this letter, in situ sea state information is utilized to facilitate the detection of targets within sea clutter. First, the sea clutter spectrum, which is absent of vessel, is constructed. Second, sensitive sea clutter features that are influenced by vessel targets are selected and analyzed. Third, anomalies in sensitive sea clutter features are detected by obtaining respective thresholds. Finally, vessel targets are identified by the synthesized anomaly detection. Experimental results demonstrate the effectiveness of the proposed method, and the vessels detected using the HFSWR are further verified using synchronous automatic identification system information.

[1]  Hanseok Ko,et al.  Compact HF Surface Wave Radar Data Generating Simulator for Ship Detection and Tracking , 2017, IEEE Geoscience and Remote Sensing Letters.

[2]  Ling Zhang,et al.  Ocean Surface Current Measurement Using Shipborne HF Radar: Model and Analysis , 2016, IEEE Journal of Oceanic Engineering.

[3]  M. L. Parkinson,et al.  Observations of the broadening and coherence of MF/lower HF surface-radar ocean echoes , 1997 .

[4]  Paolo Braca,et al.  Experimental Evaluation of the Range–Doppler Coupling on HF Surface Wave Radars , 2013, IEEE Geoscience and Remote Sensing Letters.

[5]  D. Barrick Remote sensing of sea state by radar , 1972 .

[6]  Q. M. Jonathan Wu,et al.  Automatic Detection of Ship Targets Based on Wavelet Transform for HF Surface Wavelet Radar , 2017, IEEE Geoscience and Remote Sensing Letters.

[7]  D. Barrick,et al.  Mapping Wind Directions with HF Radar , 1997 .

[8]  M. Heron,et al.  Applying a unified directional wave spectrum to the remote sensing of wind wave directional spreading , 2002 .

[9]  Marc Hélier,et al.  Wavelet Contribution to Remote Sensing of the Sea and Target Detection for a High-Frequency Surface Wave Radar , 2008, IEEE Geoscience and Remote Sensing Letters.

[10]  Alexandre Baussard,et al.  Ship detection based on morphological component analysis of high-frequency surface wave radar images , 2012 .

[11]  Ali Khenchaf,et al.  HFSW Radar Model: Simulation and Measurement , 2010, IEEE Transactions on Geoscience and Remote Sensing.

[12]  Eric W. Gill,et al.  Simulation and detection of tsunami signatures in ocean surface currents measured by HF radar , 2011 .

[13]  Jie Zhang,et al.  Vessel target detection based on fusion range-Doppler image for dual-frequency high-frequency surface wave radar , 2016 .

[14]  Algorithm to eliminate the wind direction ambiguity from the monostatic high-frequency radar backscatter spectra , 2015 .