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Data Verification of OSMAR-S HF Ground Wave Radar for the Remote Sea Surface Current in the Northern South China Sea
Pages: 1-6
Year: Issue:  3
Journal: Journal of Ocean Technology

Keyword:  HF ground wave radarfast Fourier transformharmonic analysiscorrelation analysis;
Abstract: In order to grasp the error distribution of the OSMAR-S HF ground wave radar for the remote sea surface currents in the northern South China Sea, the spatial distribution of the radar current data is firstly analyzed, and it is found that there is a blind zone in the middle of the radar connection. The radar current data are compared with the ADCP current data, and the current velocity error in the middle region is found to be smaller than in other regions. In order to obtain a more comprehensive analysis, the harmonic analysis method is applied, the tidal current and residual current are calculated and compared with the tidal current data of the forecast system and the wind data of the weather station, respectively, with the fast Fourier transform for data filtering used in the calculation process. The results show that in the middle region of the outward sea side covered by the radar electromagnetic waves, especially in the region close to 90° between the two radar stations,the current accuracy is higher than in other regions. Based on the above conclusions, some recommendations for the use of radars are given in this paper.
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