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    • Ocean surface radial velocities obtained by High Frequency (HF) radar in coastal waters of Great Lakes, Hawaii, Puerto Rico/Virgin Islands, eastern US/Gulf of Mexico, and western US during August 2023 (NCEI Accession 0283190)

    Metadata Updated: November 1, 2023

    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.

    Access & Use Information

    License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

    Downloads & Resources

    Dates

    Metadata Date 2023-09-24T20:55:41Z
    Metadata Created Date November 1, 2023
    Metadata Updated Date November 1, 2023
    Reference Date(s) September 24, 2023 (publication)
    Frequency Of Update asNeeded

    Metadata Source

    Harvested from NOAA/NESDIS/ncei/accessions

    Other Data Resources

    Graphic Preview

    Graphic not available.

    Additional Metadata

    Resource Type Dataset
    Metadata Date 2023-09-24T20:55:41Z
    Metadata Created Date November 1, 2023
    Metadata Updated Date November 1, 2023
    Reference Date(s) September 24, 2023 (publication)
    Responsible Party (Point of Contact)
    Contact Email
    Guid gov.noaa.nodc:0283190
    Access Constraints Cite as: Petraitis, Dawn; NOAA National Data Buoy Center (2023). Ocean surface radial velocities obtained by High Frequency (HF) radar in coastal waters of Great Lakes, Hawaii, Puerto Rico/Virgin Islands, eastern US/Gulf of Mexico, and western US during August 2023 (NCEI Accession 0283190). [indicate subset used]. NOAA National Centers for Environmental Information. Unpublished Dataset. https://www.ncei.noaa.gov/archive/accession/0283190. Accessed [date]., Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose.
    Bbox East Long 39.532
    Bbox North Lat 54.2625
    Bbox South Lat -74.262
    Bbox West Long -158.1169
    Coupled Resource
    Frequency Of Update asNeeded
    Graphic Preview Description Graphic not available.
    Graphic Preview File https://www.ncei.noaa.gov/access/metadata/landing-page/bin/gfx?id=gov.noaa.nodc:0283190
    Graphic Preview Type PNG
    Harvest Object Id 8ab9a471-d611-4ef0-b87c-c9cfe62a83e2
    Harvest Source Id c084a438-6f6b-470d-93e0-16aeddb9f513
    Harvest Source Title NOAA/NESDIS/ncei/accessions
    Licence Data in this archival information package are not currently available for public download from NCEI. Please contact NCEI directly for access to these data., accessLevel: Public
    Lineage
    Metadata Language eng
    Metadata Type geospatial
    Old Spatial {"type": "Polygon", "coordinates": [[[-158.1169, -74.262], [39.532, -74.262], [39.532, 54.2625], [-158.1169, 54.2625], [-158.1169, -74.262]]]}
    Progress pending
    Spatial Data Service Type
    Spatial Reference System
    Spatial Harvester True
    Temporal Extent Begin 2023-08-01
    Temporal Extent End 2023-08-31

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