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OAS accession Detail for 0185706
| << previous | |revision: 6 |
| accessions_id: | 0185706 | archive |
|---|---|
| Title: | Surface ocean radial velocities obtained by HF-radar from stations located along coastal waters of Puerto Rico/Virgin Islands, eastern US/Gulf of America, and western US during December 2009 (NCEI Accession 0185706) |
| Abstract: | This dataset contains surface ocean radial velocities obtained by HF-radar from stations located along coastal waters of the United States. Radial velocity files contain metadata in a key-value format, while the measured velocities and associated ancillary data are reported in a tab-delimited format. The National Data Buoy Center (NDBC) — in collaboration with the Scripps Institution of Oceanography through June 2025 and thereafter with NOAA’s National Environmental Satellite, Data, and Information Service (NESDIS) — assembles the data from the Integrated Ocean Observing System (IOOS) Surface Currents Program’s High-Frequency (HF) Radar National Network and submits the data on a monthly basis to NOAA’s National Centers for Environmental Information (NCEI). Scripps Institution of Oceanography has submitted these data to NCEI to supplement the data previously received from NDBC. Remote sensing of ocean surface velocity from shore-based HF-radar sensors bridges an operational observational gap between point samples obtained from in-situ sampling and synoptic scale relatively low resolution data obtained from satellites by providing continuous mesoscale coverage at relatively high resolution near the coast. HF-radar systems measure the speed of ocean surface currents in directions radial to the antenna in near real time. Radial velocities alone are a measurement of surface ocean velocity projected along the direction radial to the antenna, which only show those currents’ movement towards or away from the HF-radar sensor’s antenna. Radial measurements of ocean velocity may be used directly in some applications such as model assimilation but are commonly used in combination with overlapping sites to estimate the total vector ocean velocity. Systems operate continuously in all weather conditions and are installed near the coastline. Range resolution of measured currents is determined by the radar transmit bandwidth used. Bandwidth is controlled by radio frequency licenses and translates to range resolutions of 0.5 to 6 kilometers. Maximum ranges of current measurements also depend on radar transmit frequency and vary from about 40 km offshore to about 200 km offshore. Velocities are measured in the upper 0.3 - 2.5 meters of the ocean depending on the operating frequency and vertical velocity shear profile. |
| Date received: | 20250911 |
| Start date: | 20091201 |
| End date: | 20091231 |
| Seanames: | Caribbean Sea, Channel Islands National Marine Sanctuary, Coastal Waters of Florida, Florida Keys National Marine Sanctuary, New York Bight, North Atlantic Ocean, North Pacific Ocean |
| West boundary: | -124.5655 |
| East boundary: | -65.65465 |
| North boundary: | 46.176417 |
| South boundary: | 18.09995 |
| Observation types: | current measurements - surface currents, physical |
| Instrument types: | radar - high frequency oceanographic |
| Datatypes: | CURRENT SPEED - EAST/WEST COMPONENT (U), CURRENT SPEED - NORTH/SOUTH COMPONENT (V) |
| Submitter: | Hervey, Rex V. |
| Submitting institution: | US DOC; NOAA; NWS; National Data Buoy Center |
| Collecting institutions: | California Polytechnic State University, San Luis Obispo, Canadian Coast Guard, Humboldt State University, Old Dominion University, Oregon State University, Rutgers, The State University of New Jersey, San Francisco State University, Skidaway Institute of Oceanography, Stevens Institute of Technology, The University of Rhode Island, The University of Southern Mississippi, University of California - Davis; Bodega Marine Laboratory, University of California San Diego; Scripps Institution of Oceanography, University of California, Santa Barbara, University of Connecticut, University of Delaware, University of Maine, University of Massachusetts Dartmouth, University of Miami, University of North Carolina - Chapel Hill, University of Puerto Rico at Mayagüez, Department of Marine Sciences, University of South Carolina, University of Southern California, US DOC; NOAA; National Ocean Service, US Navy; Naval Postgraduate School |
| Contributing projects: | Integrated Ocean Observing System Data Assembly Centers Data Stewardship Program, IOOS |
| Platforms: | |
| Number of observations: | |
| Supplementary information: | Documents about processing HF-radar data and other related information are archived in NCEI accession 0126755. In this accession, NCEI has archived multiple versions of these data. The latest (and best) version of these data has the largest version number. |
| Availability date: | |
| Metadata version: | 6 |
| Keydate: | 2019-02-20 19:28:34+00 |
| Editdate: | 2025-09-12 12:32:34+00 |