Ocean Remote Sensing Using High-frequency and Microwave Radars

点击翻译按钮获取中文摘要

High frequency surface wave radar (HFSWR) and microwave nautical radar (MNR) are widely employed in ocean remote sensing. HFSWR provides sea surface current, wind, wave and target information "over the horizon" due to the interaction of HF radio and ocean gravity waves. Traditionally, HFSWR systems have been land-based; compact ship-borne HFSWR has also been used but is subject to distortion of the Doppler spectra due to platform motion. Most HFSWR systems in use rely on a monostatic configuration in which the transmitting and receiving components are at the same location. In order to reduce the cost and potentially improve coverage, research on operating HF radar bistatically - i.e. transmission and reception occur at different sites - is necessary. Sea surface information can also be retrieved from the MNR images that contain the spatial and temporal structure of the ocean surface. MNR provides sea surface information with better range resolution but has limited coverage. In order to provide real-time information for applications in areas such as search and rescue, oil spill control and marine navigation, MNR needs to be further investigated.