High Frequency Radar Stations

High frequency (HF) radars measure the speed and direction of ocean surface currents in near real time. These radars can measure currents over a large region of the coastal ocean, from a few kilometers offshore up to 200 kilometers, and can operate under any weather conditions. They are located near the shoreline, and need not be situated atop a high point of land. Dozens of institutions own and operate HF radars within the United States, and many are coordinated through the U.S. Integrated Ocean Observing System. Ocean surface current data from these radars are shared on national servers by the National Data Buoy Center and IOOS HF Radar Data Assembly Center. Direct data download | Metadata This item is curated by the Marine Cadastre team. Find more information at marinecadastre.gov.高频（HF）雷达可近乎实时地探测海洋表层海流的流速与流向。此类雷达可对离岸数公里至200公里的近岸大范围海域进行海流探测，且可在各类气象条件下稳定运行。其部署位置紧邻岸线，无需设置于高地之上。美国境内有数十家机构拥有并运营高频雷达，其中多数通过美国综合海洋观测系统（U.S. Integrated Ocean Observing System）开展协同调度。此类雷达获取的海洋表层海流数据，由国家数据浮标中心（National Data Buoy Center）与IOOS高频雷达数据组装中心共享至国家级服务器。直接数据下载 | 元数据 本数据集由Marine Cadastre团队负责审核维护，更多相关信息可访问marinecadastre.gov。