ERDDAP > info > hfradar_ushi_1km_25hravg

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 Subtidal Surface Ocean Velocity, Hawaiian Islands, 1km Resolution		F   I   M	background			DOC/NOAA/NESDIS/O...	hfradar_ushi_1km_25hravg

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	2026-01-17T11:03:41Z
attribute	NC_GLOBAL	day_night_data_flag	String	both
attribute	NC_GLOBAL	defaultGraphQuery	String	u_mean[][(18.17304):(22.7744)][(-159.1082):(-154.5047)],v_mean[][(18.17304):(22.7744)][(-159.1082):(-154.5047)]&.draw=vectors
attribute	NC_GLOBAL	Easternmost_Easting	double	-151.9565
attribute	NC_GLOBAL	format_version	String	2.0.00
attribute	NC_GLOBAL	geospatial_lat_max	double	24.91688
attribute	NC_GLOBAL	geospatial_lat_min	double	16.2204
attribute	NC_GLOBAL	geospatial_lat_resolution	double	0.009039999999999998
attribute	NC_GLOBAL	geospatial_lat_units	String	degrees_north
attribute	NC_GLOBAL	geospatial_lon_max	double	-151.9565
attribute	NC_GLOBAL	geospatial_lon_min	double	-163.1444
attribute	NC_GLOBAL	geospatial_lon_resolution	double	0.009299999999999987
attribute	NC_GLOBAL	geospatial_lon_units	String	degrees_east
attribute	NC_GLOBAL	history	String	HFRNet v1r0
attribute	NC_GLOBAL	id	String	161264b0-0412-4630-90b0-c96921e8d67e
attribute	NC_GLOBAL	id_HFR	String	202601162100iooshfruwlsSTCushi1km
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 20.9
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	24.91688
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	rtv-ushi-1km-uwls_v1r0_hfr_intermediate_s202601160900000_e202601160900000_c202601161100192.nc, rtv-ushi-1km-uwls_v1r0_hfr_intermediate_s202601161000000_e202601161000000_c202601161200210.nc, rtv-ushi-1km-uwls_v1r0_hfr_intermediate_s202601161100000_e202601161100000_c202601161300203.nc, rtv-ushi-1km-uwls_v1r0_hfr_intermediate_s202601161200000_e202601161200000_c202601161400241.nc, rtv-ushi-1km-uwls_v1r0_hfr_intermediate_s202601161300000_e202601161300000_c202601161500217.nc, rtv-ushi-1km-uwls_v1r0_hfr_intermediate_s202601161400000_e202601161400000_c202601161600216.nc, rtv-ushi-1km-uwls_v1r0_hfr_intermediate_s202601161500000_e202601161500000_c202601161700211.nc, rtv-ushi-1km-uwls_v1r0_hfr_intermediate_s202601161600000_e202601161600000_c202601161800204.nc, rtv-ushi-1km-uwls_v1r0_hfr_intermediate_s202601161700000_e202601161700000_c202601161900214.nc, rtv-ushi-1km-uwls_v1r0_hfr_intermediate_s202601161800000_e202601161800000_c202601162000324.nc, rtv-ushi-1km-uwls_v1r0_hfr_intermediate_s202601161900000_e202601161900000_c202601162100207.nc, rtv-ushi-1km-uwls_v1r0_hfr_intermediate_s202601162000000_e202601162000000_c202601162200183.nc, rtv-ushi-1km-uwls_v1r0_hfr_intermediate_s202601162100000_e202601162100000_c202601162300213.nc, rtv-ushi-1km-uwls_v1r0_hfr_intermediate_s202601162200000_e202601162200000_c202601170000355.nc, rtv-ushi-1km-uwls_v1r0_hfr_intermediate_s202601162300000_e202601162300000_c202601170100202.nc, rtv-ushi-1km-uwls_v1r0_hfr_intermediate_s202601170000000_e202601170000000_c202601170200179.nc, rtv-ushi-1km-uwls_v1r0_hfr_intermediate_s202601170100000_e202601170100000_c202601170300204.nc, rtv-ushi-1km-uwls_v1r0_hfr_intermediate_s202601170300000_e202601170300000_c202601170500232.nc, rtv-ushi-1km-uwls_v1r0_hfr_intermediate_s202601170400000_e202601170400000_c202601170600241.nc, rtv-ushi-1km-uwls_v1r0_hfr_intermediate_s202601170500000_e202601170500000_c202601170700170.nc, rtv-ushi-1km-uwls_v1r0_hfr_intermediate_s202601170600000_e202601170600000_c202601170800204.nc, rtv-ushi-1km-uwls_v1r0_hfr_intermediate_s202601170700000_e202601170700000_c202601170900332.nc, rtv-ushi-1km-uwls_v1r0_hfr_intermediate_s202601170800000_e202601170800000_c202601171000203.nc, rtv-ushi-1km-uwls_v1r0_hfr_intermediate_s202601170900000_e202601170900000_c202601171100206.nc
attribute	NC_GLOBAL	sourceUrl	String	https://dods.ndbc.noaa.gov/thredds/dodsC/hfradar_ushi_1km_25hravg
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 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 hourly near real-time surface current maps. The subtidal current is estimated by applying a 25 hour moving average filter to the hourly surface current maps.
attribute	NC_GLOBAL	testOutOfDate	String	now-3hours
attribute	NC_GLOBAL	time_coverage_end	String	2026-01-16T22:00:00Z
attribute	NC_GLOBAL	time_coverage_start	String	2025-10-17T10:00:00Z
attribute	NC_GLOBAL	title	String	Near-Real Time Subtidal Surface Ocean Velocity, Hawaiian Islands, 1km Resolution
attribute	NC_GLOBAL	Westernmost_Easting	double	-163.1444
dimension	time		double	nValues=1951, evenlySpaced=false, averageSpacing=1h 7m 34s
attribute	time	_ChunkSizes	uint	1024
attribute	time	_CoordinateAxisType	String	Time
attribute	time	actual_range	double	1.7606952E9, 1.7686008E9
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=963, evenlySpaced=true, averageSpacing=0.009039999999999998
attribute	latitude	_ChunkSizes	uint	963
attribute	latitude	_CoordinateAxisType	String	Lat
attribute	latitude	actual_range	float	16.2204, 24.91688
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=1204, evenlySpaced=true, averageSpacing=0.009299999999999987
attribute	longitude	_ChunkSizes	uint	1204
attribute	longitude	_CoordinateAxisType	String	Lon
attribute	longitude	actual_range	float	-163.1444, -151.9565
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_mean		float	time, latitude, longitude
attribute	u_mean	_ChunkSizes	uint	1, 963, 1204
attribute	u_mean	_FillValue	float	-327.67
attribute	u_mean	ancillary_variables	String	n_obs
attribute	u_mean	cell_methods	String	depth: mean time: mean (interval: 1 hour comment: 1 hour average)
attribute	u_mean	colorBarMaximum	double	0.15
attribute	u_mean	colorBarMinimum	double	-0.15
attribute	u_mean	coordinates	String	depth
attribute	u_mean	grid_mapping	String	wgs84
attribute	u_mean	ioos_category	String	Currents
attribute	u_mean	long_name	String	mean eastward surface velocity
attribute	u_mean	standard_name	String	surface_eastward_sea_water_velocity
attribute	u_mean	units	String	m s-1
variable	v_mean		float	time, latitude, longitude
attribute	v_mean	_ChunkSizes	uint	1, 963, 1204
attribute	v_mean	_FillValue	float	-327.67
attribute	v_mean	ancillary_variables	String	n_obs
attribute	v_mean	cell_methods	String	depth: mean time: mean (interval: 1 hour comment: 1 hour average)
attribute	v_mean	colorBarMaximum	double	0.15
attribute	v_mean	colorBarMinimum	double	-0.15
attribute	v_mean	coordinates	String	depth
attribute	v_mean	grid_mapping	String	wgs84
attribute	v_mean	ioos_category	String	Currents
attribute	v_mean	long_name	String	mean northward surface velocity
attribute	v_mean	standard_name	String	surface_northward_sea_water_velocity
attribute	v_mean	units	String	m s-1
variable	u_max		float	time, latitude, longitude
attribute	u_max	_ChunkSizes	uint	1, 963, 1204
attribute	u_max	_FillValue	float	-327.67
attribute	u_max	ancillary_variables	String	n_obs
attribute	u_max	cell_methods	String	depth: mean time: maximum (interval: 1 hour comment: 1 hour average)
attribute	u_max	colorBarMaximum	double	0.15
attribute	u_max	colorBarMinimum	double	-0.15
attribute	u_max	coordinates	String	depth
attribute	u_max	grid_mapping	String	wgs84
attribute	u_max	ioos_category	String	Currents
attribute	u_max	long_name	String	maximum eastward surface velocity
attribute	u_max	standard_name	String	surface_eastward_sea_water_velocity
attribute	u_max	units	String	m s-1
variable	v_max		float	time, latitude, longitude
attribute	v_max	_ChunkSizes	uint	1, 963, 1204
attribute	v_max	_FillValue	float	-327.67
attribute	v_max	ancillary_variables	String	n_obs
attribute	v_max	cell_methods	String	depth: mean time: maximum (interval: 1 hour comment: 1 hour average)
attribute	v_max	colorBarMaximum	double	0.15
attribute	v_max	colorBarMinimum	double	-0.15
attribute	v_max	coordinates	String	depth
attribute	v_max	grid_mapping	String	wgs84
attribute	v_max	ioos_category	String	Currents
attribute	v_max	long_name	String	maximum northward surface velocity
attribute	v_max	standard_name	String	surface_northward_sea_water_velocity
attribute	v_max	units	String	m s-1
variable	u_min		float	time, latitude, longitude
attribute	u_min	_ChunkSizes	uint	1, 963, 1204
attribute	u_min	_FillValue	float	-327.67
attribute	u_min	ancillary_variables	String	n_obs
attribute	u_min	cell_methods	String	depth: mean time: minimum (interval: 1 hour comment: 1 hour average)
attribute	u_min	colorBarMaximum	double	0.15
attribute	u_min	colorBarMinimum	double	-0.15
attribute	u_min	coordinates	String	depth
attribute	u_min	grid_mapping	String	wgs84
attribute	u_min	ioos_category	String	Currents
attribute	u_min	long_name	String	minimum eastward surface velocity
attribute	u_min	standard_name	String	surface_eastward_sea_water_velocity
attribute	u_min	units	String	m s-1
variable	v_min		float	time, latitude, longitude
attribute	v_min	_ChunkSizes	uint	1, 963, 1204
attribute	v_min	_FillValue	float	-327.67
attribute	v_min	ancillary_variables	String	n_obs
attribute	v_min	cell_methods	String	depth: mean time: minimum (interval: 1 hour comment: 1 hour average)
attribute	v_min	colorBarMaximum	double	0.15
attribute	v_min	colorBarMinimum	double	-0.15
attribute	v_min	coordinates	String	depth
attribute	v_min	grid_mapping	String	wgs84
attribute	v_min	ioos_category	String	Currents
attribute	v_min	long_name	String	minimum northward surface velocity
attribute	v_min	standard_name	String	surface_northward_sea_water_velocity
attribute	v_min	units	String	m s-1
variable	u_var		float	time, latitude, longitude
attribute	u_var	_ChunkSizes	uint	1, 963, 1204
attribute	u_var	_FillValue	float	-3.2767
attribute	u_var	ancillary_variables	String	n_obs
attribute	u_var	cell_methods	String	depth: mean time: variance (interval: 1 hour comment: 1 hour average)
attribute	u_var	colorBarMaximum	double	0.1
attribute	u_var	colorBarMinimum	double	0.0
attribute	u_var	coordinates	String	depth
attribute	u_var	grid_mapping	String	wgs84
attribute	u_var	ioos_category	String	Currents
attribute	u_var	long_name	String	eastward surface velocity variance
attribute	u_var	standard_name	String	surface_eastward_sea_water_velocity
attribute	u_var	units	String	m2 s-2
variable	v_var		float	time, latitude, longitude
attribute	v_var	_ChunkSizes	uint	1, 963, 1204
attribute	v_var	_FillValue	float	-3.2767
attribute	v_var	ancillary_variables	String	n_obs
attribute	v_var	cell_methods	String	depth: mean time: variance (interval: 1 hour comment: 1 hour average)
attribute	v_var	colorBarMaximum	double	0.1
attribute	v_var	colorBarMinimum	double	0.0
attribute	v_var	coordinates	String	depth
attribute	v_var	grid_mapping	String	wgs84
attribute	v_var	ioos_category	String	Currents
attribute	v_var	long_name	String	northward surface velocity variance
attribute	v_var	standard_name	String	surface_northward_sea_water_velocity
attribute	v_var	units	String	m2 s-2
variable	n_obs		short	time, latitude, longitude
attribute	n_obs	_ChunkSizes	uint	1, 963, 1204
attribute	n_obs	_FillValue	short	-32767
attribute	n_obs	cell_methods	String	time: sum (interval: 1 hour)
attribute	n_obs	coordinates	String	depth
attribute	n_obs	grid_mapping	String	wgs84
attribute	n_obs	ioos_category	String	Quality
attribute	n_obs	standard_name	String	number_of_observations
attribute	n_obs	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.