ERDDAP > info > hfradar_ushi_6km

Grid DAP Data	Sub- set	Table DAP Data	Make A Graph	W M S	Source Data Files	Title	Sum- mary	FGDC, ISO, Metadata	Back- ground Info	RSS	E mail	Institution	Dataset ID
data			graph	M		Near-Real Time Surface Ocean Velocity, Hawaiian Islands, 6km Resolution		F   I   M	background			DOC/NOAA/NESDIS/O...	hfradar_ushi_6km

The Dataset's Variables and Attributes

Row Type	Variable Name	Attribute Name	Data Type	Value
attribute	NC_GLOBAL	cdm_data_type	String	Grid
attribute	NC_GLOBAL	Conventions	String	CF-1.12,ACDD-1.3
attribute	NC_GLOBAL	creator_email	String	data.ioos at noaa.gov
attribute	NC_GLOBAL	creator_name	String	NOAA IOOS Surface Currents Program
attribute	NC_GLOBAL	creator_type	String	institution
attribute	NC_GLOBAL	creator_url	String	https://ioos.noaa.gov/project/hf-radar/
attribute	NC_GLOBAL	date_created	String	2026-06-10T01:30:38Z
attribute	NC_GLOBAL	day_night_data_flag	String	both
attribute	NC_GLOBAL	defaultGraphQuery	String	u[][(18.17304):(22.7744)][(-159.1082):(-154.5047)],v[][(18.17304):(22.7744)][(-159.1082):(-154.5047)]&.draw=vectors
attribute	NC_GLOBAL	Easternmost_Easting	double	-151.9844
attribute	NC_GLOBAL	format_version	String	2.0.00
attribute	NC_GLOBAL	geospatial_lat_max	double	24.8988
attribute	NC_GLOBAL	geospatial_lat_min	double	16.2204
attribute	NC_GLOBAL	geospatial_lat_resolution	double	0.05424
attribute	NC_GLOBAL	geospatial_lat_units	String	degrees_north
attribute	NC_GLOBAL	geospatial_lon_max	double	-151.9844
attribute	NC_GLOBAL	geospatial_lon_min	double	-163.1444
attribute	NC_GLOBAL	geospatial_lon_resolution	double	0.05579999999999998
attribute	NC_GLOBAL	geospatial_lon_units	String	degrees_east
attribute	NC_GLOBAL	history	String	HFRNet v1r0
attribute	NC_GLOBAL	id	String	b1924b0e-0617-4e74-94df-40c3ec14a357
attribute	NC_GLOBAL	id_HFR	String	202606100000iooshfruwlsRTVushi6km
attribute	NC_GLOBAL	infoUrl	String	https://ioos.noaa.gov/project/hf-radar/
attribute	NC_GLOBAL	institution	String	DOC/NOAA/NESDIS/OSPO > Office of Satellite and Product Operations, NESDIS, NOAA, U.S. Department of Commerce.
attribute	NC_GLOBAL	instrument	String	OCEAN SURFACE CURRENT RADAR
attribute	NC_GLOBAL	instrument_vocabulary	String	Global Change Master Directory (GCMD) Keywords, Version 21.2
attribute	NC_GLOBAL	keywords	String	Central Pacific Ocean, Coastal Processes, Earth Science, Hawaiian Islands, IOOS, Marine Environment Monitoring, NOAA, Ocean Circulation, Ocean Currents, Oceans, Pacific Ocean, PacIOOS, Surface Currents, Tidal Currents, Tides, Wind-Driven Circulation
attribute	NC_GLOBAL	keywords_vocabulary	String	Global Change Master Directory (GCMD) Keywords, Version 21.2
attribute	NC_GLOBAL	license	String	The data may be used and redistributed for free but is not intended for legal use, since it may contain inaccuracies. Neither the data Contributor, ERD, NOAA, 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.
attribute	NC_GLOBAL	metadata_link	String	https://cdn.ioos.noaa.gov/media/2017/12/hfradar_nodc_sep_2014.pdf
attribute	NC_GLOBAL	naming_authority	String	gov.noaa.nesdis.ncei
attribute	NC_GLOBAL	Northernmost_Northing	double	24.8988
attribute	NC_GLOBAL	platform	String	CODAR SeaSonde, COASTAL STATIONS
attribute	NC_GLOBAL	platform_vocabulary	String	Global Change Master Directory (GCMD) Keywords, Version 21.2
attribute	NC_GLOBAL	processing_level	String	NOAA Level 3. Near real-time dataset with automated data acquisition and processing quality control.
attribute	NC_GLOBAL	product_version	String	v1r0
attribute	NC_GLOBAL	production_environment	String	INT
attribute	NC_GLOBAL	production_site	String	PLAIT
attribute	NC_GLOBAL	program	String	Integrated Ocean Observing System (IOOS)
attribute	NC_GLOBAL	project	String	NESDIS Common Cloud Framework.
attribute	NC_GLOBAL	publisher_email	String	espcoperations at noaa.gov
attribute	NC_GLOBAL	publisher_name	String	DOC/NOAA/NESDIS/OSPO > Office of Satellite and Product Operations, NESDIS, NOAA, U.S. Department of Commerce.
attribute	NC_GLOBAL	publisher_type	String	institution
attribute	NC_GLOBAL	publisher_url	String	https://www.ospo.noaa.gov
attribute	NC_GLOBAL	references	String	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.
attribute	NC_GLOBAL	source	String	RDL_kak_2026_06_10_000000.ruv, RDL_kap_2026_06_10_000000.ruv, RDL_kkh_2026_06_10_000000.ruv, RDL_kna_2026_06_10_000000.ruv, RDL_kok_2026_06_10_000000.ruv, RDL_ppk_2026_06_10_000000.ruv
attribute	NC_GLOBAL	sourceUrl	String	https://dods.ndbc.noaa.gov/thredds/dodsC/hfradar_ushi_6km
attribute	NC_GLOBAL	Southernmost_Northing	double	16.2204
attribute	NC_GLOBAL	standard_name_vocabulary	String	CF Standard Name Table, Version 89
attribute	NC_GLOBAL	summary	String	Surface ocean velocities estimated from HF-Radar 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.
attribute	NC_GLOBAL	testOutOfDate	String	now-3hours
attribute	NC_GLOBAL	time_coverage_end	String	2026-06-10T01:00:00Z
attribute	NC_GLOBAL	time_coverage_start	String	2026-03-10T22:00:00Z
attribute	NC_GLOBAL	title	String	Near-Real Time Surface Ocean Velocity, Hawaiian Islands, 6km Resolution
attribute	NC_GLOBAL	Westernmost_Easting	double	-163.1444
dimension	time		double	nValues=2185, evenlySpaced=false, averageSpacing=1h 0m 5s
attribute	time	_ChunkSizes	uint	1024
attribute	time	_CoordinateAxisType	String	Time
attribute	time	actual_range	double	1.77318E9, 1.7810532E9
attribute	time	axis	String	T
attribute	time	bounds	String	time_bnds
attribute	time	calendar	String	gregorian
attribute	time	ioos_category	String	Time
attribute	time	long_name	String	Time
attribute	time	standard_name	String	time
attribute	time	time_origin	String	01-JAN-1970 00:00:00
attribute	time	units	String	seconds since 1970-01-01T00:00:00Z
dimension	latitude		float	nValues=161, evenlySpaced=true, averageSpacing=0.05424
attribute	latitude	_ChunkSizes	uint	161
attribute	latitude	_CoordinateAxisType	String	Lat
attribute	latitude	actual_range	float	16.2204, 24.8988
attribute	latitude	axis	String	Y
attribute	latitude	ioos_category	String	Location
attribute	latitude	long_name	String	Latitude
attribute	latitude	standard_name	String	latitude
attribute	latitude	units	String	degrees_north
dimension	longitude		float	nValues=201, evenlySpaced=true, averageSpacing=0.05579999999999998
attribute	longitude	_ChunkSizes	uint	201
attribute	longitude	_CoordinateAxisType	String	Lon
attribute	longitude	actual_range	float	-163.1444, -151.9844
attribute	longitude	axis	String	X
attribute	longitude	ioos_category	String	Location
attribute	longitude	long_name	String	Longitude
attribute	longitude	standard_name	String	longitude
attribute	longitude	units	String	degrees_east
variable	u		float	time, latitude, longitude
attribute	u	_ChunkSizes	uint	1, 161, 201
attribute	u	_FillValue	float	-327.67
attribute	u	ancillary_variables	String	dopx
attribute	u	cell_methods	String	depth: mean time: mean
attribute	u	colorBarMaximum	double	0.15
attribute	u	colorBarMinimum	double	-0.15
attribute	u	coordinates	String	depth
attribute	u	grid_mapping	String	wgs84
attribute	u	ioos_category	String	Currents
attribute	u	standard_name	String	surface_eastward_sea_water_velocity
attribute	u	units	String	m s-1
variable	v		float	time, latitude, longitude
attribute	v	_ChunkSizes	uint	1, 161, 201
attribute	v	_FillValue	float	-327.67
attribute	v	ancillary_variables	String	dopy
attribute	v	cell_methods	String	depth: mean time: mean
attribute	v	colorBarMaximum	double	0.15
attribute	v	colorBarMinimum	double	-0.15
attribute	v	coordinates	String	depth
attribute	v	grid_mapping	String	wgs84
attribute	v	ioos_category	String	Currents
attribute	v	standard_name	String	surface_northward_sea_water_velocity
attribute	v	units	String	m s-1
variable	dopy		float	time, latitude, longitude
attribute	dopy	_ChunkSizes	uint	1, 161, 201
attribute	dopy	_FillValue	float	-327.67
attribute	dopy	colorBarMaximum	double	1.25
attribute	dopy	colorBarMinimum	double	0.0
attribute	dopy	comment	String	The latitudinal dilution of precision (dopy) represents the contribution of radial geometry to uncertainty in the northward velocity estimate (v).
attribute	dopy	coordinates	String	depth
attribute	dopy	grid_mapping	String	wgs84
attribute	dopy	ioos_category	String	Quality
attribute	dopy	long_name	String	latitudinal dilution of precision
variable	dopx		float	time, latitude, longitude
attribute	dopx	_ChunkSizes	uint	1, 161, 201
attribute	dopx	_FillValue	float	-327.67
attribute	dopx	colorBarMaximum	double	1.25
attribute	dopx	colorBarMinimum	double	0.0
attribute	dopx	comment	String	The longitudinal dilution of precision (dopx) represents the contribution of radial geometry to uncertainty in the eastward velocity estimate (u).
attribute	dopx	coordinates	String	depth
attribute	dopx	grid_mapping	String	wgs84
attribute	dopx	ioos_category	String	Quality
attribute	dopx	long_name	String	longitudinal dilution of precision
variable	hdop		float	time, latitude, longitude
attribute	hdop	_ChunkSizes	uint	1, 161, 201
attribute	hdop	_FillValue	float	-327.67
attribute	hdop	ancillary_variables	String	dopx dopy
attribute	hdop	colorBarMaximum	double	1.25
attribute	hdop	colorBarMinimum	double	0.0
attribute	hdop	comment	String	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.
attribute	hdop	coordinates	String	depth
attribute	hdop	grid_mapping	String	wgs84
attribute	hdop	ioos_category	String	Quality
attribute	hdop	long_name	String	horizontal dilution of precision
variable	number_of_sites		byte	time, latitude, longitude
attribute	number_of_sites	_ChunkSizes	uint	1, 161, 201
attribute	number_of_sites	_FillValue	byte	-127
attribute	number_of_sites	colorBarMaximum	double	5.0
attribute	number_of_sites	colorBarMinimum	double	2.0
attribute	number_of_sites	comment	String	Number of radars contributing radials to the total solution
attribute	number_of_sites	coordinates	String	depth
attribute	number_of_sites	grid_mapping	String	wgs84
attribute	number_of_sites	ioos_category	String	Quality
attribute	number_of_sites	long_name	String	number of contributing radars
attribute	number_of_sites	units	String	count
variable	number_of_radials		short	time, latitude, longitude
attribute	number_of_radials	_ChunkSizes	uint	1, 161, 201
attribute	number_of_radials	_FillValue	short	-32767
attribute	number_of_radials	colorBarMaximum	double	300.0
attribute	number_of_radials	colorBarMinimum	double	0.0
attribute	number_of_radials	comment	String	Number of radials contributing to the total solution
attribute	number_of_radials	coordinates	String	depth
attribute	number_of_radials	grid_mapping	String	wgs84
attribute	number_of_radials	ioos_category	String	Quality
attribute	number_of_radials	long_name	String	number of contributing radials
attribute	number_of_radials	units	String	count

The information in the table above is also available in other file formats (.csv, .htmlTable, .itx, .json, .jsonlCSV1, .jsonlCSV, .jsonlKVP, .mat, .nc, .nccsv, .tsv, .xhtml) via a RESTful web service.