hfradar_ushi_1km eng UTF8 dataset service 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 2026-06-09 ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for imagery and gridded data ISO 19115-2:2009(E) 4 column 1204 0.009299997280561616 row 963 0.00903999978935892 vertical 0.0 temporal 8356 3656.0 area Near-Real Time Surface Ocean Velocity, Hawaiian Islands, 1km Resolution 2012-01-01 creation 2012-01-01 issued 2025-09-30 revision org.pacioos hfradar_ushi_1km 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 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 resourceProvider 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 publisher Terrill, E. et al., 2006. Data Management and Real-time Distribution in the HF-Radar National Network. Proceedings of the MTS/IEEE Oceans 2006 Conference, Boston MA, September 2006. Surface ocean velocities estimated from HF-Radar (HFR) are representative of the upper 0.5 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 1km resolution grid of the Hawaiian Islands to produce near real-time surface current maps. PacIOOS provides timely, reliable, and accurate ocean information to support a safe, clean, productive ocean and resilient coastal zone in the U.S. Pacific Islands region. The Pacific Islands Ocean Observing System (PacIOOS) is funded through the National Oceanic and Atmospheric Administration (NOAA) as a Regional Association within the U.S. Integrated Ocean Observing System (IOOS). PacIOOS is coordinated by the University of Hawaii School of Ocean and Earth Science and Technology (SOEST). 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_1km.png Sample image. http://pacioos.org/metadata/browse/hfradar_ushi_1km.2.png Photo of instrument site. 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 surface_eastward_sea_water_velocity surface_northward_sea_water_velocity depth longitude latitude time theme CF Standard Name Table v39 The data may be used and redistributed for free but is not intended for navigational or legal use, since it may contain inaccuracies. Neither the data Contributor, University of Hawaii, PacIOOS, NOAA, State of Hawaii nor the United States Government, nor any of their employees or contractors, makes any warranty, express or implied, including warranties of merchantability and fitness for a particular purpose, or assumes any legal liability for the accuracy, completeness, or usefulness, of this information. Pacific Islands Ocean Observing System (PacIOOS) largerWorkCitation project Unidata Common Data Model Grid largerWorkCitation project eng oceans 1 -163.14439 -151.9565 16.2204 24.91688 seconds 2025-06-20T17:00:00Z 2026-06-09T07:00:00Z -0.30000001192092896 -0.30000001192092896 Near-Real Time Surface Ocean Velocity, Hawaiian Islands, 1km Resolution 2012-01-01 creation 2012-01-01 issued 2025-09-30 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 Pierre Flament originator Surface ocean velocities estimated from HF-Radar (HFR) are representative of the upper 0.5 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 1km resolution grid of the Hawaiian Islands to produce near real-time surface current maps. THREDDS OPeNDAP 1 -163.14439 -151.9565 16.2204 24.91688 2025-06-20T17:00:00Z 2026-06-09T07:00:00Z -0.30000001192092896 -0.30000001192092896 tight OPeNDAP Client Access https://pae-paha.pacioos.hawaii.edu/thredds/dodsC/hfradar_ushi_1km OPeNDAP:OPeNDAP OPeNDAP THREDDS OPeNDAP download Near-Real Time Surface Ocean Velocity, Hawaiian Islands, 1km Resolution 2012-01-01 creation 2012-01-01 issued 2025-09-30 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 Pierre Flament originator Surface ocean velocities estimated from HF-Radar (HFR) are representative of the upper 0.5 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 1km resolution grid of the Hawaiian Islands to produce near real-time surface current maps. Open Geospatial Consortium Web Coverage Service (WCS) 1 -163.14439 -151.9565 16.2204 24.91688 2025-06-20T17:00:00Z 2026-06-09T07:00:00Z -0.30000001192092896 -0.30000001192092896 tight GetCapabilities https://pae-paha.pacioos.hawaii.edu/thredds/wcs/hfradar_ushi_1km?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, 1km Resolution 2012-01-01 creation 2012-01-01 issued 2025-09-30 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 Pierre Flament originator Surface ocean velocities estimated from HF-Radar (HFR) are representative of the upper 0.5 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 1km resolution grid of the Hawaiian Islands to produce near real-time surface current maps. Open Geospatial Consortium Web Map Service (WMS) 1 -163.14439 -151.9565 16.2204 24.91688 2025-06-20T17:00:00Z 2026-06-09T07:00:00Z -0.30000001192092896 -0.30000001192092896 tight GetCapabilities https://pae-paha.pacioos.hawaii.edu/thredds/wms/hfradar_ushi_1km?service=WMS&version=1.3.0&request=GetCapabilities OGC:WMS OGC-WMS Open Geospatial Consortium Web Map Service (WMS) download Near-Real Time Surface Ocean Velocity, Hawaiian Islands, 1km Resolution 2012-01-01 creation 2012-01-01 issued 2025-09-30 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 Pierre Flament originator Surface ocean velocities estimated from HF-Radar (HFR) are representative of the upper 0.5 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 1km resolution grid of the Hawaiian Islands to produce near real-time surface current maps. THREDDS NetCDF Subset Service 1 -163.14439 -151.9565 16.2204 24.91688 2025-06-20T17:00:00Z 2026-06-09T07:00:00Z -0.30000001192092896 -0.30000001192092896 tight NetCDFSubsetService https://pae-paha.pacioos.hawaii.edu/thredds/ncss/hfradar_ushi_1km/dataset.html UNIDATA:NCSS THREDDS_NetCDF_Subset THREDDS NetCDF Subset Service download wgs84 int grid mapping number_of_radials short number of contributing radials. Number of radials contributing to the total solution u float eastward sea surface velocity (surface_eastward_sea_water_velocity) v float northward sea surface velocity (surface_northward_sea_water_velocity) dopy float latitudinal dilution of precision. The latitudinal dilution of precision (dopy) represents the contribution of radial geometry to uncertainty in the northward velocity estimate (v). dopx float longitudinal dilution of precision. The longitudinal dilution of precision (dopx) represents the contribution of radial geometry to uncertainty in the eastward velocity estimate (u). hdop float horizontal dilution of precision. The horizontal dilution of precision (hdop) is the vector length (magnitude) of the eastward (dopx) and northward (dopy) dilution of precision. It represents the contribution of radial geometry to the overall uncertainty in the total velocity (u and v) estimate. number_of_sites byte number of contributing radars. Number of radars contributing radials to the total solution depth float depth (depth). Nominal depth (and corresponding bounds) based on contributing radars lon float longitude (longitude) lat float latitude (latitude) time int time (time) 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 publisher OPeNDAP DAP/2.0 https://pae-paha.pacioos.hawaii.edu/thredds/hfr.html?dataset=hfradar_ushi_1km UNIDATA:THREDDS THREDDS Catalog This URL provides a catalog page for this dataset within THREDDS Data Server (TDS). download https://pae-paha.pacioos.hawaii.edu/thredds/dodsC/hfradar_ushi_1km.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 http://pacioos.org/voyager/index.html?b=20.838278%2C-158.535461%2C21.460737%2C-157.364731&t=h&o=hfr:2,hfr:1:kts:d1s2 http PacIOOS Voyager (Google Maps API) This URL provides a viewer and/or data access for this dataset. download http://pacioos.org/currents-category/obs/ http PacIOOS website This URL provides a viewer and/or data access for this dataset. download https://pae-paha.pacioos.hawaii.edu/erddap/griddap/hfradar_ushi_1km 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 and/or data access 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_1km to hfradar_ushi_1km. All links have been updated accordingly. 2025-09-30T22:00:00Z Data being re-distributed via PacIOOS THREDDS Data Server (TDS) to enable Web Map Service (WMS) via TDS/ncWMS, which is not functional using NOAA/NDBC TDS. This record was translated from NcML using UnidataDD2MI.xsl Version 2.3.