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Land-based high frequency surface wave radar (HFSWR) has been successfully employed for early warning and ocean remote sensing. However, there remain potential gaps for shipborne HFSWR in the application of ocean remote sensing. In this paper, the feasibility of extracting wind direction is studied based on the first-order ocean surface cross section in shipborne HFSWR. According to the spreading...
Distributed shipborne over the horizon radar (DS-OTHR) is a new radar detection system that becomes a new research direction of shipborne OTHR. Array reconstruction and signal reconstruction are the key techniques in the radar system. Reasonable reconstruction for moving distributed radar receiving subarrays can realize accurate measurement of target. In this letter, we propose an interpolation approach...
Under certain sea state, the sea wave will lead to the ship oscillation when the ship is sailing on the sea. The influence that the ship oscillation has on the target echo is usually discarded when simulating the target in shipborne HFSWOTHR. In this paper, the characteristic of ship oscillation is analyzed, including rolling, pitching and yawing. The model of the ship oscillation is set up. The concept...
The spreading first-order sea echo spectrum in shipborne high-frequency surface wave radar (HFSWR) severely impacts the measurement of surface currents. Space-time processing techniques like space-time multiple signal classification (ST-MUSIC) algorithm, usually studied for two-dimensional high resolution radar imaging, are the effective methods for solving the problem. The rank of the sea echo covariance...
The fact that HF radar sea clutter has chaotic characteristics was proved many years ago. Correlation dimension is one of the key parameters to determine whether the time series are chaotic or not. We must identify the scale-free interval firstly in order to calculate it. However, the identification results of many methods aren't accuracy enough. So, a new method, which is the fuzzy 2-means algorithm,...
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