Measurements of ocean wave and current field using dual polarized X-band radar |
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| Authors: | Limin Cui Yijun He Hui Shen Haibin Lü |
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| Institution: | (1) Department of Hydraulic and Ocean Engineering, National Cheng Kung University, 1, Ta-Hsueh Rd., Tainan, Taiwan, ROC;(2) Department of Marine Environmental Informatics, National Taiwan Ocean University, 2, Beining Rd., Keelung, Taiwan, ROC;(3) Department of Environmental and Hazards-Resistant Design, Huafan University, Huafan Rd. Shihding Township, Taipei County, Taiwan, ROC;(4) Institute of Ocean Technology and Marine Affairs, National Cheng Kung University, 1, Ta-Hsueh Rd., Tainan, Taiwan, ROC |
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| Abstract: | A new ocean wave and sea surface current monitoring system with horizontally-(HH) and vertically-(VV) polarized X-band radar
was developed. Two experiments into the use of the radar system were carried out at two sites, respectively, for calibration
process in Zhangzi Island of the Yellow Sea, and for validation in the Yellow Sea and South China Sea. Ocean wave parameters
and sea surface current velocities were retrieved from the dual polarized radar image sequences based on an inverse method.
The results obtained from dual-polarized radar data sets acquired in Zhangzi Island are compared with those from an ocean
directional buoy. The results show that ocean wave parameters and sea surface current velocities retrieved from radar image
sets are in a good agreement with those observed by the buoy. In particular, it has been found that the vertically-polarized
radar is better than the horizontally-polarized radar in retrieving ocean wave parameters, especially in detecting the significant
wave height below 1.0 m. |
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