hfradar_ushi_6km eng UTF8 dataset U.S. Integrated Ocean Observing System (IOOS) High Frequency Radar Network (HFRNet) data.ioos@noaa.gov https://hfradar.ioos.us http web browser information https://ror.org/01yvark48 http web browser Research Organization Registry (ROR) Identifier information pointOfContact 2026-08-11 ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for imagery and gridded data ISO 19115-2:2009(E) 3 column 0.055799942016601566 row 0.05424000024795532 temporal 60.0 area Near-Real Time Surface Ocean Velocity, Hawaiian Islands, 6km Resolution 2012-01-01 creation 2012-01-01 issued 2025-08-22 revision us.ioos.hfradar hfradar_ushi_6km U.S. Integrated Ocean Observing System (IOOS) High Frequency Radar Network (HFRNet) data.ioos@noaa.gov https://hfradar.ioos.us http web browser information https://ror.org/01yvark48 http web browser Research Organization Registry (ROR) Identifier information originator Pierre Flament University of Hawaii at Manoa pflament@hawaii.edu https://www.oceanphysics.org/wiki/index.php?n=Staff.PierreFlament http web browser information https://orcid.org/0000-0003-3259-4619 http web browser Open Researcher and Contributor ID (ORCID) Identifier information https://ror.org/01wspgy28 http web browser Research Organization Registry (ROR) Identifier information originator Pacific Islands Ocean Observing System (PacIOOS) info@pacioos.org http://pacioos.org http web browser information https://ror.org/04j9xr266 http web browser Research Organization Registry (ROR) Identifier information resourceProvider NOAA National Data Buoy Center (NDBC) webmaster.ndbc@noaa.gov https://www.ndbc.noaa.gov http web browser information https://ror.org/02qy3wv98 http web browser Research Organization Registry (ROR) Identifier information publisher Surface ocean velocities estimated from HF-Radar (HFR) are representative of the upper 2.4 meters of the ocean. The main objective of near-real time processing is to produce the best product from available data at the time of processing. Radial velocity measurements are obtained from individual radar sites through the U.S. HF-Radar Network. Hourly radial data are processed by unweighted least squares on a 6km resolution grid of the Hawaiian Islands to produce near real-time surface current maps for the most recent 90 days. U.S. Integrated Ocean Observing System (IOOS) High Frequency Radar Network (HFRNet) data.ioos@noaa.gov https://hfradar.ioos.us http web browser information https://ror.org/01yvark48 http web browser Research Organization Registry (ROR) Identifier information pointOfContact http://pacioos.org/metadata/browse/hfradar_ushi_6km.png Sample image. http://pacioos.org/metadata/browse/hfradar_ushi_6km.2.png Photo of one of the instrument sites. Credit: PacIOOS/Fiona Langenberger. Earth Science > Oceans > Ocean Circulation > Ocean Currents Earth Science > Spectral/Engineering > Radio Wave theme GCMD Science Keywords In Situ Land-based Platforms > > Radio Transmitters theme GCMD Platform Keywords Earth Remote Sensing Instruments > Active Remote Sensing > Profilers/Sounders > Radar Sounders > SCR-HF > Surface Current Radar theme GCMD Instrument Keywords Continent > North America > United States Of America > Hawaii Ocean > Pacific Ocean > Central Pacific Ocean > Hawaiian Islands > Big Island Ocean > Pacific Ocean > Central Pacific Ocean > Hawaiian Islands > Hawaii Island > Hilo Ocean > Pacific Ocean > Central Pacific Ocean > Hawaiian Islands > Oahu > Honolulu Ocean > Pacific Ocean > Central Pacific Ocean > Hawaiian Islands > Oahu > Waianae place GCMD Location Keywords PacIOOS > Pacific Islands Ocean Observing System project GCMD Project Keywords PacIOOS > Pacific Islands Ocean Observing System dataCenter GCMD Data Center Keywords depth latitude longitude surface_eastward_sea_water_velocity surface_northward_sea_water_velocity time theme CF Standard Name Table v39 eng oceans 1 -163.14439392089844 -151.9564971923828 16.220399856567383 24.916879653930664 seconds 2026-05-11T22:00:00Z now Near-Real Time Surface Ocean Velocity, Hawaiian Islands, 6km Resolution 2012-01-01 creation 2012-01-01 issued 2025-08-22 revision U.S. Integrated Ocean Observing System (IOOS) High Frequency Radar Network (HFRNet) data.ioos@noaa.gov https://hfradar.ioos.us http web browser information https://ror.org/01yvark48 http web browser Research Organization Registry (ROR) Identifier information originator Surface ocean velocities estimated from HF-Radar (HFR) are representative of the upper 2.4 meters of the ocean. The main objective of near-real time processing is to produce the best product from available data at the time of processing. Radial velocity measurements are obtained from individual radar sites through the U.S. HF-Radar Network. Hourly radial data are processed by unweighted least squares on a 6km resolution grid of the Hawaiian Islands to produce near real-time surface current maps for the most recent 90 days. THREDDS OPeNDAP 1 -163.14439392089844 -151.9564971923828 16.220399856567383 24.916879653930664 seconds 2026-05-11T22:00:00Z now tight OPeNDAP Client Access https://dods.ndbc.noaa.gov/thredds/dodsC/hfradar_ushi_6km OPeNDAP:OPeNDAP OPeNDAP THREDDS OPeNDAP download Near-Real Time Surface Ocean Velocity, Hawaiian Islands, 6km Resolution 2012-01-01 creation 2012-01-01 issued 2025-08-22 revision U.S. Integrated Ocean Observing System (IOOS) High Frequency Radar Network (HFRNet) data.ioos@noaa.gov https://hfradar.ioos.us http web browser information https://ror.org/01yvark48 http web browser Research Organization Registry (ROR) Identifier information originator Surface ocean velocities estimated from HF-Radar (HFR) are representative of the upper 2.4 meters of the ocean. The main objective of near-real time processing is to produce the best product from available data at the time of processing. Radial velocity measurements are obtained from individual radar sites through the U.S. HF-Radar Network. Hourly radial data are processed by unweighted least squares on a 6km resolution grid of the Hawaiian Islands to produce near real-time surface current maps for the most recent 90 days. Open Geospatial Consortium Web Coverage Service (WCS) 1 -163.14439392089844 -151.9564971923828 16.220399856567383 24.916879653930664 seconds 2026-05-11T22:00:00Z now tight GetCapabilities https://dods.ndbc.noaa.gov/thredds/wcs/hfradar_ushi_6km?service=WCS&version=1.0.0&request=GetCapabilities OGC:WCS OGC-WCS Open Geospatial Consortium Web Coverage Service (WCS) download Near-Real Time Surface Ocean Velocity, Hawaiian Islands, 6km Resolution 2012-01-01 creation 2012-01-01 issued 2025-08-22 revision U.S. Integrated Ocean Observing System (IOOS) High Frequency Radar Network (HFRNet) data.ioos@noaa.gov https://hfradar.ioos.us http web browser information https://ror.org/01yvark48 http web browser Research Organization Registry (ROR) Identifier information originator Surface ocean velocities estimated from HF-Radar (HFR) are representative of the upper 2.4 meters of the ocean. The main objective of near-real time processing is to produce the best product from available data at the time of processing. Radial velocity measurements are obtained from individual radar sites through the U.S. HF-Radar Network. Hourly radial data are processed by unweighted least squares on a 6km resolution grid of the Hawaiian Islands to produce near real-time surface current maps for the most recent 90 days. THREDDS NetCDF Subset Service 1 -163.14439392089844 -151.9564971923828 16.220399856567383 24.916879653930664 seconds 2026-05-11T22:00:00Z now tight NetCDFSubsetService https://dods.ndbc.noaa.gov/thredds/ncss/grid/hfradar_ushi_6km/dataset.html UNIDATA:NCSS THREDDS_NetCDF_Subset THREDDS NetCDF Subset Service download lat float latitude (latitude) lon float longitude (longitude) depth float depth (depth) depth_bnds float depth bounds wgs84 byte grid mapping processing_parameters byte Methods and parameters used to compute total solutions radial_metadata byte Metadata on radial velocities used to compute total solutions prod_mon int Total (actual) number of retrievals time int time (time) time_bnds int time bounds u float eastward sea surface velocity (surface_eastward_sea_water_velocity) v float northward sea surface velocity (surface_northward_sea_water_velocity) dopx float longitudinal dilution of precision dopy float latitudinal dilution of precision hdop float horizontal dilution of precision number_of_sites int number of contributing radars number_of_radials int number of contributing radials U.S. Integrated Ocean Observing System (IOOS) High Frequency Radar Network (HFRNet) data.ioos@noaa.gov https://hfradar.ioos.us http web browser information https://ror.org/01yvark48 http web browser Research Organization Registry (ROR) Identifier information originator OPeNDAP https://dods.ndbc.noaa.gov/thredds/catalog/hfradar.html?dataset=hfradar_ushi_6km UNIDATA:THREDDS THREDDS Catalog This URL provides a catalog page for this dataset within THREDDS Data Server (TDS). download https://dods.ndbc.noaa.gov/thredds/dodsC/hfradar_ushi_6km.html http File Information This URL provides a standard OPeNDAP html interface for selecting data from this dataset. Change the extension to .info for a description of the dataset. download https://pae-paha.pacioos.hawaii.edu/erddap/griddap/hfradar_ushi_6km ERDDAP:griddap ERDDAP This URL provides a viewer and/or data access for this dataset. download https://hfradar.ioos.us/hfrnet/ http IOOS HFRNet Surface Current Mapping This URL provides a viewer for this dataset. download https://www.ncei.noaa.gov/access/metadata/landing-page/bin/iso?id=gov.noaa.nodc:IOOS-HFRadarRTVector http NOAA/NCEI HF-Radar RTV Vector Archive This URL provides data access to historical archives for this dataset. download dataset 2009-07-08T00:00:00Z UH/SOEST (P. Flament) deployed HFR array at Koko Head, Oahu (KOK): 21.2608, -157.7028. 2009-12-11T00:00:00Z UH/SOEST (P. Flament) deployed HFR array at Kakaako (Waikiki), Oahu (KAK): 21.2918, -157.8631. 2010-07-28T22:00:00Z IOOS HFRNet (CORDC/UCSD) begins generating Hawaii surface currents from radial velocities. 2010-09-08T06:45:00Z UH/SOEST (P. Flament) deployed HFR array at Kalaeloa (Barbers Point), Oahu (KAL): 21.2975, -158.0836. 2013-03-26T22:30:00Z UH/SOEST (P. Flament) deployed HFR array at Kaena Point, Oahu (KNA): 21.5749, -158.2819. 2013-12-17T06:40:00Z UH/SOEST (P. Flament) deployed HFR array at Keaukaha, Hawaii Island (KKH): 19.7320, -155.0480. 2015-05-05T07:00:00Z UH/SOEST (P. Flament) deployed HFR array at Pepeekeo, Hawaii Island (PPK): 19.8472, -155.0828. 2015-09-14T19:00:00Z UH/SOEST (P. Flament) deployed HFR array at Kapolei, Oahu (KAP): 21.3114, -158.1169. 2020-06-16T00:00:00Z Exclude invalid Kaena Point, Oahu (KNA) data prior to 2019-11-30T16:00:00Z. 2021-04-19T06:19:00Z To comply with new ITU rules and frequency allocations, changed KAK range resolution from 600 m to 750 m (250 kHz to 200 kHz) and PPK from 666 m to 750 m (224 kHz to 200 kHz). Changed KAL, KOK, and KNA frequency to 16.150 MHz with 100 kHz bandwidth (1.5 km), which does not impact their range or resolution. 2025-08-22T18:00:00Z Technical support and data distribution for the HFRNet has migrated from the Coastal Observing Research and Development Center (CORDC) of Scripps Institution of Oceanography (SIO) at the University of California San Diego (UCSD) to the U.S. Integrated Ocean Observng System (IOOS) and the NOAA National Data Buoy Center (NDBC). Dataset id changed from HFRADAR_USHI_hourly_RTV_6km to hfradar_ushi_6km. All links have been updated accordingly. WMS is no longer supported. Rather than the entire time series, only the most recent 90 days are aggregated; historical data are now archived separately at NCEI. This record was translated from NcML using UnidataDD2MI.xsl Version 2.3 and manually edited for completeness.