Dataset Information

netcdf_library_version: netcdf library version 3.6.1 of Feb 3 2008 23:15:25 $
format_version: HFRNet_1.0.0b2
product_version: HFRNet_1.1.01
Conventions: CF-1.1
title: Near-Real Time Surface Ocean Velocity
institution: Scripps Institution of Oceanography
source: Surface Ocean HF-Radar
history: 12-Mar-2008 22:26:19: NetCDF file created
references: 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.
creator_name: Mark Otero
creator_email: motero@mpl.ucsd.edu
creator_url: http://cordc.ucsd.edu/projects/mapping/
summary: Surface ocean velocities estimated from HF-Radar are representitive 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 HF-Radar Network and processed to create near-real time velocities (RTVs)
geospatial_lat_min: 21.7359600
geospatial_lat_max: 46.4944191
geospatial_lon_min: -97.8838501
geospatial_lon_max: -57.2312088
grid_resolution: 6km
grid_projection: equidistant cylindrical
regional_description: Unites States, East and Gulf Coast
Unlimited_Dimension: time

Variables in this Dataset

time: Array of 32 bit Integers [time = 0..0]
standard_name: time
units: seconds since 1970-01-01
calendar: gregorian
lat: Array of 32 bit Reals [lat = 0..459]
standard_name: latitude
units: degrees_north
lon: Array of 32 bit Reals [lon = 0..700]
standard_name: longitude
units: degrees_east
u: Grid
standard_name: surface_eastward_sea_water_velocity
units: m s-1
_FillValue: -32768
scale_factor: 0.00999999978
ancillary_variables: DOPx
u: Array of 16 bit Integers [time = 0..0][lat = 0..459][lon = 0..700]
standard_name: surface_eastward_sea_water_velocity
units: m s-1
_FillValue: -32768
scale_factor: 0.00999999978
ancillary_variables: DOPx
time: Array of 32 bit Integers [time = 0..0]
standard_name: time
units: seconds since 1970-01-01
calendar: gregorian
lat: Array of 32 bit Reals [lat = 0..459]
standard_name: latitude
units: degrees_north
lon: Array of 32 bit Reals [lon = 0..700]
standard_name: longitude
units: degrees_east
v: Grid
standard_name: surface_northward_sea_water_velocity
units: m s-1
_FillValue: -32768
scale_factor: 0.00999999978
ancillary_variables: DOPy
v: Array of 16 bit Integers [time = 0..0][lat = 0..459][lon = 0..700]
standard_name: surface_northward_sea_water_velocity
units: m s-1
_FillValue: -32768
scale_factor: 0.00999999978
ancillary_variables: DOPy
time: Array of 32 bit Integers [time = 0..0]
standard_name: time
units: seconds since 1970-01-01
calendar: gregorian
lat: Array of 32 bit Reals [lat = 0..459]
standard_name: latitude
units: degrees_north
lon: Array of 32 bit Reals [lon = 0..700]
standard_name: longitude
units: degrees_east
DOPx: Grid
long_name: longitudinal dilution of precision
comment: 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.
_FillValue: -32768
scale_factor: 0.00999999978
DOPx: Array of 16 bit Integers [time = 0..0][lat = 0..459][lon = 0..700]
long_name: longitudinal dilution of precision
comment: 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.
_FillValue: -32768
scale_factor: 0.00999999978
time: Array of 32 bit Integers [time = 0..0]
standard_name: time
units: seconds since 1970-01-01
calendar: gregorian
lat: Array of 32 bit Reals [lat = 0..459]
standard_name: latitude
units: degrees_north
lon: Array of 32 bit Reals [lon = 0..700]
standard_name: longitude
units: degrees_east
DOPy: Grid
long_name: latitudinal dilution of precision
comment: 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.
_FillValue: -32768
scale_factor: 0.00999999978
DOPy: Array of 16 bit Integers [time = 0..0][lat = 0..459][lon = 0..700]
long_name: latitudinal dilution of precision
comment: 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.
_FillValue: -32768
scale_factor: 0.00999999978
time: Array of 32 bit Integers [time = 0..0]
standard_name: time
units: seconds since 1970-01-01
calendar: gregorian
lat: Array of 32 bit Reals [lat = 0..459]
standard_name: latitude
units: degrees_north
lon: Array of 32 bit Reals [lon = 0..700]
standard_name: longitude
units: degrees_east
site_lat: Array of 32 bit Reals [nSites = 0..26]
long_name: Contributing radar site latitudes
standard_name: latitude
units: degrees_north
site_lon: Array of 32 bit Reals [nSites = 0..26]
long_name: Contributing radar site longitudes
standard_name: longitude
units: degrees_east
site_code: Array of Strings [nSites = 0..26]
long_name: Contributing radar site code
string_length: 25
site_netCode: Array of Strings [nSites = 0..26]
long_name: Contributing radar site network affiliation code
string_length: 25
procParams: Array of 32 bit Reals [nProcParam = 0..6]
long_name: RTV processing parameters
comment: 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)