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    • Ocean currents measured by Shipboard Acoustic Doppler Current Profilers (SADCP) from global oceans as part of the Joint Archive (JASADCP) since 1985

    Metadata Updated: April 1, 2025

    This collection contains cruises beginning in 1985 and continuing up to the present, which were received, reviewed, and prepared for archival at the Joint Archive (JA) for Shipboard Acoustic Doppler Current Profilers (SADCP). Only datasets that have passed the quality control and calibration stages, thus science-ready, are included in the JASADCP. The JASADCP is a collaboration of NOAA and the University of Hawaii Currents Group. The data have been contributed by both US and international organizations.

    Absolute U- and V-component ocean current vectors from SADCP, as both a high frequency sampling (nominally 5 minutes with 8 m depth bins) and an averaged subset (hourly time and 10 m depth means), are provided for the global oceans. The depth range was typically from 20 to 300 m prior to the late 1990s when penetration extended to over 1 km. Since the 2000's, most ships have been equipped with multiple ADCP sensors, each which is capable in simultaneously recording in different modes. This allows multiple profiles with variations in resolution and depth range, and in turn, gives new ways to analyze the data. Thus, each cruise can have several sonar-cruise sets, for each which the JASADCP assigns a unique SACID.

    The high frequency samples along with ancillary parameters of each sonar-cruise set are provided in the Common Oceanographic Data Access System (CODAS) binary format, from which long- and short-form NetCDF files are made. The long form is an exact dump of the CODAS binary database and holds the velocity of the water relative to the ship, velocity of the ship, and all available ancillary parameters. The short form gives currents in Earth coordinates with received signal strength and select ancillary parameters. The standard (averaged hourly/10m depth bins) subset is stored in ASCII and NetCDF.

    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 2025-03-28T19:45:25Z
    Metadata Created Date December 4, 2020
    Metadata Updated Date April 1, 2025
    Reference Date(s) April 16, 2001 (publication), March 28, 2025 (revision)
    Frequency Of Update asNeeded

    Metadata Source

    Harvested from NOAA/NESDIS/ncei/accessions

    Other Data Resources

    Graphic Preview

    Preview graphic

    Additional Metadata

    Resource Type Series
    Metadata Date 2025-03-28T19:45:25Z
    Metadata Created Date December 4, 2020
    Metadata Updated Date April 1, 2025
    Reference Date(s) April 16, 2001 (publication), March 28, 2025 (revision)
    Responsible Party (Point of Contact)
    Contact Email
    Guid gov.noaa.nodc:NCEI-UH-JASADCP
    Access Constraints Cite as: Caldwell, Patrick C.; Firing, Eric; Hummon, Julia M. (2001). Ocean currents measured by Shipboard Acoustic Doppler Current Profilers (SADCP) from global oceans as part of the Joint Archive (JASADCP) since 1985. [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/g961-ya97. 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 180
    Bbox North Lat 90.00
    Bbox South Lat -90.00
    Bbox West Long -180
    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:NCEI-UH-JASADCP
    Graphic Preview Type PNG
    Harvest Object Id 93905b40-81eb-4dc5-9bd8-9e71a086fa58
    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": [[[-180.0, -90.0], [180.0, -90.0], [180.0, 90.0], [-180.0, 90.0], [-180.0, -90.0]]]}
    Progress completed
    Spatial Data Service Type
    Spatial Reference System
    Spatial Harvester True
    Temporal Extent Begin 1985-06-16
    Temporal Extent End 2024-06-11

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