HDF5 file, superblock version 2
group /
	attribute Conventions = "CF-1.1"
	attribute creator_email = "webmaster.ndbc@noaa.gov"
	attribute creator_name = "NDBC Webmaster"
	attribute creator_url = "http://hfradar.ndbc.noaa.gov/"
	attribute format_version = "HFRNet_1.0.0"
	attribute geospatial_lat_max = 61.9926605
	attribute geospatial_lat_min = 50.0179787
	attribute geospatial_lon_max = -123.836411
	attribute geospatial_lon_min = -167.0
	attribute grid_projection = "equidistant cylindrical"
	attribute grid_resolution = "6km"
	attribute history = "30-May-2019 18:12:07: NetCDF file created\n30-May-2019 18:12:07: Filtered U and V by GDOP < 1.25"
	attribute institution = "National Data Buoy Center"
	attribute netcdf_library_version = "4.1.3"
	attribute product_version = "HFRNet_1.1.05"
	attribute references = "Terrill, E. et al., 2006. Data Management and Real-time\nDistribution in the HF-Radar National Network. Proceedings\nof the MTS/IEEE Oceans 2006 Conference, Boston MA,\nSeptember 2006."
	attribute regional_description = "Unites States, Gulf of Alaska"
	attribute source = "Surface Ocean HF-Radar"
	attribute summary = (text block)
| Surface ocean velocities estimated from HF-Radar are
| representative of the upper 0.3 - 2.5 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 6 km resolution grid of the Gulf of
| Alaska to produce near real-time surface current maps
	attribute title = "Near-Real Time Surface Ocean Velocity, Gulf of Alaska,\n6 km Resolution"
dataset /DOPx: int16, shape (1, 223, 409)
	attribute _FillValue = -32768
	attribute comment = (text block)
| The longitudinal dilution of precision (DOPx) represents the
| contribution of the radars' configuration geometry to
| uncertainty in the eastward velocity estimate (u). DOPx is a
| direct multiplier of the standard error in obtaining the
| standard deviation for the eastward velocity estimate from the
| least squares best fit. DOPx and DOPy are commonly used to
| obtain the geometric dilution of precision
| (GDOP = sqrt(DOPx^2 + DOPy^2)), a useful metric for filtering
| errant velocities due to poor geometry.
	attribute long_name = "longitudinal dilution of precision"
	attribute scale_factor = 0.00999999978
dataset /DOPy: int16, shape (1, 223, 409)
	attribute _FillValue = -32768
	attribute comment = (text block)
| The latitudinal dilution of precision (DOPy) represents the
| contribution of the radars' configuration geometry to
| uncertainty in the northward velocity estimate (v). DOPy is a
| direct multiplier of the standard error in obtaining the
| standard deviation for the northward velocity estimate from the
| least squares best fit. DOPx and DOPy are commonly used to
| obtain the geometric dilution of precision
| (GDOP = sqrt(DOPx^2 + DOPy^2)), a useful metric for filtering
| errant velocities due to poor geometry.
	attribute long_name = "latitudinal dilution of precision"
	attribute scale_factor = 0.00999999978
dataset /lat: float32, shape (223)
	attribute standard_name = "latitude"
	attribute units = "degrees_north"
// lat: first 50.0179787, last 61.9926605, count 223
dataset /lon: float32, shape (409)
	attribute standard_name = "longitude"
	attribute units = "degrees_east"
// lon: first -167.0, last -123.836411, count 409
dataset /nProcParam: float32, shape (7)
dataset /nSites: float32, shape (2)
dataset /nSites_maxStrlen: float32, shape (25)
dataset /procParams: float32, shape (7)
	attribute comment = (text block)
| 01) Maximum GDOP threshold
| 02) Maximum speed threshold (cm s-1)
| 03) Minimum number of sites required
| 04) Minimum number of radials required
| 05) Maximum angular gap to interpolate radial
|     data over (degrees, 0 = no interpolation)
| 06) Maximum gap in range to interpolate radial
|     data over (range-resolution, 0 = no interpolation)
| 07) Spatial search radius for radial solutions (km)
	attribute long_name = "RTV processing parameters"
dataset /site_code: string(1), shape (2, 25)
	attribute long_name = "Contributing radar site code"
dataset /site_lat: float32, shape (2)
	attribute long_name = "Contributing radar site latitudes"
	attribute standard_name = "latitude"
	attribute units = "degrees_north"
dataset /site_lon: float32, shape (2)
	attribute long_name = "Contributing radar site longitudes"
	attribute standard_name = "longitude"
	attribute units = "degrees_east"
dataset /site_netCode: string(1), shape (2, 25)
	attribute long_name = "Contributing radar site network affiliation code"
dataset /time: int32, shape (1)
	attribute calendar = "gregorian"
	attribute standard_name = "time"
	attribute units = "seconds since 1970-01-01"
dataset /u: int16, shape (1, 223, 409)
	attribute _FillValue = -32768
	attribute ancillary_variables = "DOPx"
	attribute scale_factor = 0.00999999978
	attribute standard_name = "surface_eastward_sea_water_velocity"
	attribute units = "m s-1"
dataset /v: int16, shape (1, 223, 409)
	attribute _FillValue = -32768
	attribute ancillary_variables = "DOPy"
	attribute scale_factor = 0.00999999978
	attribute standard_name = "surface_northward_sea_water_velocity"
	attribute units = "m s-1"