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    • Surface ocean velocities obtained by High Frequency (HF) radar stations located in Straits of Florida and Gulf of Mexico from 2019-12-28 to 2022-06-03 (NCEI Accession 0224983)

    Metadata Updated: May 1, 2025

    High Frequency (HF) Radar is a real-time ocean surface current mapping instrument with the intended purpose of observing surface currents over the horizon out to a range of about 200km. The radial velocity components, Eastward surface current (u) and Northward surface current (v) may be used for model assimilation and validation, and to better understand the evolution of the Loop Current System (LCS) in the Gulf of Mexico.

    The Center for Ocean Observing Leadership at Rutgers University assembles raw HF radar data from UGOS HF radar operators. This data is post-processed from the radar cross spectra into radial ocean current data. Radial velocity files are presented in the Columnar Table Format (CTF) format which presents keyword descriptors as metadata preceded by percent signs (%) while the measured velocities and diagnostic data are reported in a tab-delimited format in separate tables. Radial currents were tested based on Version 1.0 of the Quality Assurance / Quality Control of Real Time Oceanographic Data (QARTOD) Manual for Real-Time Quality Control of High Frequency Radar Surface Current Data by U.S. Integrated Ocean Observing System (2016). New columns containing QARTOD flags are appended to the data tables. QARTOD QC radial files are then submitted on a semi-annual basis to NCEI. The QARTOD radial tests that have been applied are Syntax (Test 6), Max Threshold (Test 7), Valid Location (Test 8), Radial Count (Test 9), Spatial Median Filter (Test 10), and the Temporal Gradient (Test 12). A flag, PRIM, is included which is the highest flag value of executed QARTOD QC tests for each radial current velocity.

    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.

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    Dates

    Metadata Date 2025-04-03T22:01:06Z
    Metadata Created Date February 26, 2021
    Metadata Updated Date May 1, 2025
    Reference Date(s) April 14, 2021 (publication), August 1, 2023 (revision)
    Frequency Of Update asNeeded

    Metadata Source

    Harvested from NOAA/NESDIS/ncei/accessions

    Other Data Resources

    Graphic Preview

    Preview graphic

    Additional Metadata

    Resource Type Dataset
    Metadata Date 2025-04-03T22:01:06Z
    Metadata Created Date February 26, 2021
    Metadata Updated Date May 1, 2025
    Reference Date(s) April 14, 2021 (publication), August 1, 2023 (revision)
    Responsible Party (Point of Contact)
    Contact Email
    Guid gov.noaa.nodc:0224983
    Access Constraints Cite as: Merz, Clifford R.; Liu, Yonggang; Smith, Michael (2021). Surface ocean velocities obtained by High Frequency (HF) radar stations located in Straits of Florida and Gulf of Mexico from 2019-12-28 to 2022-06-03 (NCEI Accession 0224983). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0224983. 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 -78.5
    Bbox North Lat 25
    Bbox South Lat 22.75
    Bbox West Long -82.75
    Coupled Resource
    Frequency Of Update asNeeded
    Graphic Preview Description Preview graphic
    Graphic Preview File https://www.ncei.noaa.gov/access/metadata/landing-page/bin/gfx?id=gov.noaa.nodc:0224983
    Graphic Preview Type PNG
    Harvest Object Id 0ff3c240-c054-4b34-8dff-77ab2ef75722
    Harvest Source Id c084a438-6f6b-470d-93e0-16aeddb9f513
    Harvest Source Title NOAA/NESDIS/ncei/accessions
    Licence accessLevel: Public
    Lineage
    Metadata Language eng
    Metadata Type geospatial
    Old Spatial {"type": "Polygon", "coordinates": [[[-82.75, 22.75], [-78.5, 22.75], [-78.5, 25.0], [-82.75, 25.0], [-82.75, 22.75]]]}
    Progress completed
    Spatial Data Service Type
    Spatial Reference System
    Spatial Harvester True
    Temporal Extent Begin 2019-12-28
    Temporal Extent End 2022-06-03

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