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General Information
File Identifier:
gov.noaa.nodc.cor:NDBC-HFRadarRadial
Metadata Date Stamp:
2024-12
Organization:
DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
Organization Role:
custodian
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Identification Information
Title:
Surface ocean velocities obtained by HF radar from stations located along coastal waters of Hawaii, North Slope Alaska, Puerto Rico/Virgin Islands, eastern US/Gulf of Mexico and western US
Abstract:
The archival package contains ocean surface radial velocities collected from High frequency (HF) radar stations. NDBC, which with SIO assembles data from the IOOS HF Radar Network, submits these data monthly to NCEI as part of NCEI's Integrated Ocean Observing System Data Assembly Centers (IOOS DACs) Data Stewardship Program. 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.
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Browse Graphic
Browse Graphic URL:
https://www.ncei.noaa.gov/access/metadata/landing-page/bin/gfx?id=gov.noaa.nodc:NDBC-HFRadarRadial
Browse Graphic Caption:
Preview graphic
Browse Graphic Type:
PNG
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Data Theme
Theme Topics:
Environment and Conservation, Oceans and Estuaries
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Spatial Domain
West Bounding Longitude:
-163.014867
South Bounding Latitude:
-64.9183
East Bounding Longitude:
-62.8876
North Bounding Latitude:
71.3789
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Contact Information
Organization:
DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
Address:
Federal Building 151 Patton Avenue
City:
Asheville
State:
NC
Postal Code:
28801-5001
Country:
USA
Email:
NCEI.Info@noaa.gov
Contact Website:
https://www.ncei.noaa.gov/
Telephone:
301-713-3277
Fax:
301-713-3300
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Metadata Reference Information
Metadata Standard Name:
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
Metadata Standard Version:
ISO 19115-2:2009(E)
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