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OAS accession Detail for 0184934
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| accessions_id: | 0184934 | archive |
|---|---|
| Title: | Ocean surface radial velocities obtained by High Frequency (HF) radar in coastal waters of Gulf of Alaska, North Slope Alaska, eastern US/Gulf of Mexico, and western US during November 2009 (NCEI Accession 0184934) |
| Abstract: | The National Data Buoy Center in collaboration with the Scripps Institution of Oceanography assembles the data from the Integrated Ocean Observing System Data Assembly Center's Data Stewardship Program and submits the data on a monthly basis to NCEI. 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. Remote sensing of ocean surface velocity from shore-based HF radar sites 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 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. Radial velocities alone are a measurement of surface ocean velocity projected along the direction radial to the antenna. 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: | 20190213 |
| Start date: | 20091101 |
| End date: | 20091130 |
| Seanames: | |
| West boundary: | -160.02705 |
| East boundary: | -65.65465 |
| North boundary: | 71.327383 |
| South boundary: | 25.241 |
| Observation types: | |
| Instrument types: | |
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| Submitter: | Hervey, Rex V. |
| Submitting institution: | US DOC; NOAA; NWS; National Data Buoy Center |
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| Number of observations: | |
| Supplementary information: | Documents about processing HF radar data and other related information are archived in NCEI accession 0126755. |
| Availability date: | |
| Metadata version: | 7 |
| Keydate: | 2019-02-15 13:36:28+00 |
| Editdate: | 2024-03-26 14:06:15+00 |