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| Dataset Title: | Near Real Time Surface Ocean Radial Velocity by HFR-COSYNA-SYLT
|
| Institution: | Helmholtz Zentrum Geesthacht (Dataset ID: EUHFR_NRTcurrent_HFR-COSYNA-SYLT) |
| Information: | Summary
| License
| FGDC
| ISO 19115
| Metadata
| Background
| Files
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|
Attributes {
time {
String _CoordinateAxisType "Time";
Float64 actual_range 1.5734664e+9, 1.71486594e+9;
String ancillary_variables "TIME_QC";
String axis "T";
String calendar "standard";
String ioos_category "Time";
String long_name "Time";
String sdn_P02_urn "SDN:P02::AYMD";
String sdn_parameter_name "Elapsed time (since 1950-01-01T00:00:00Z)";
String sdn_parameter_urn "SDN:P01::ELTJLD01";
String sdn_uom_name "Days";
String sdn_uom_urn "SDN:P06::UTAA";
String standard_name "time";
String time_origin "01-JAN-1970 00:00:00";
String units "seconds since 1970-01-01T00:00:00Z";
}
depth {
String _CoordinateAxisType "Height";
String _CoordinateZisPositive "down";
Float32 actual_range 0.0, 0.0;
String ancillary_variables "DEPTH_QC";
String axis "Z";
String ioos_category "Location";
String long_name "Depth";
String positive "down";
String references "sea_level";
String sdn_P02_urn "SDN:P02::AHGT";
String sdn_parameter_name "Depth below surface of the water body";
String sdn_parameter_urn "SDN:P01::ADEPZZ01";
String sdn_uom_name "Metres";
String sdn_uom_urn "SDN:P06::ULAA";
String standard_name "depth";
String units "m";
}
latitude {
String _CoordinateAxisType "Lat";
Float32 actual_range 53.41814, 55.2;
String ancillary_variables "POSITION_QC";
String axis "Y";
String ioos_category "Location";
String long_name "Latitude";
String sdn_P02_urn "SDN:P02::ALAT";
String sdn_parameter_name "Latitude north";
String sdn_parameter_urn "SDN:P01::ALATZZ01";
String sdn_uom_name "Degrees north";
String sdn_uom_urn "SDN:P06::DEGN";
String standard_name "latitude";
String units "degrees_north";
}
longitude {
String _CoordinateAxisType "Lon";
Float32 actual_range 5.916667, 8.970864;
String ancillary_variables "POSITION_QC";
String axis "X";
String ioos_category "Location";
String long_name "Longitude";
String sdn_P02_urn "SDN:P02::ALAT";
String sdn_parameter_name "Longitude east";
String sdn_parameter_urn "SDN:P01::ALONZZ01";
String sdn_uom_name "Degrees east";
String sdn_uom_urn "SDN:P06::DEGE";
String standard_name "longitude";
String units "degrees_east";
}
HCSS {
Float64 _FillValue -2147.483647;
String ancillary_variables "QCflag VART_QC";
Float64 colorBarMaximum 50.0;
Float64 colorBarMinimum 0.0;
String long_name "Radial variance of current velocity over coverage period";
String sdn_parameter_name "Speed standard deviation of water current in the water body";
String sdn_parameter_urn "SDSAZZ01";
String sdn_uom_name "Square metres per second squared";
String sdn_uom_urn "SDN:P06::SQM2";
String units "m2 s-2";
Float64 valid_max 10.0;
Float64 valid_min -10.0;
}
EACC {
Float64 _FillValue -32.767;
String ancillary_variables "QCflag VART_QC";
Float64 colorBarMaximum 15.0;
Float64 colorBarMinimum -15.0;
String long_name "Radial accuracy of current velocity over coverage period";
String sdn_uom_name "Metres per second";
String sdn_uom_urn "SDN:P06::UVAA";
String units "m s-1";
Float64 valid_max 10.0;
Float64 valid_min -10.0;
}
OWTR_QC {
Byte _FillValue -127;
String _Unsigned "false";
Float64 colorBarMaximum 10.0;
Float64 colorBarMinimum 0.0;
String comment "Over Water QC Test - Test applies to each vector. Thresholds=[GeoPandas \"naturalearth_lowres\"]";
String conventions "EuroGOOS European HFR Node";
String flag_meanings "no_qc_performed good_data probably_good_data bad_data_that_are_potentially_correctable bad_data value_changed value_below_detection nominal_value interpolated_value missing_value";
Byte flag_values 0, 1, 2, 3, 4, 5, 6, 7, 8, 9;
String long_name "Over-water quality flag";
String units "1";
Byte valid_max 9;
Byte valid_min 0;
}
CSPD_QC {
Byte _FillValue -127;
String _Unsigned "false";
Float64 colorBarMaximum 10.0;
Float64 colorBarMinimum 0.0;
String comment "Velocity Threshold QC Test - Test applies to each vector. Threshold=[maximum velocity=1.2 (m/s)]";
String conventions "EuroGOOS European HFR Node";
String flag_meanings "no_qc_performed good_data probably_good_data bad_data_that_are_potentially_correctable bad_data value_changed value_below_detection nominal_value interpolated_value missing_value";
Byte flag_values 0, 1, 2, 3, 4, 5, 6, 7, 8, 9;
String long_name "Velocity threshold quality flag";
String units "1";
Byte valid_max 9;
Byte valid_min 0;
}
VART_QC {
Byte _FillValue -127;
String _Unsigned "false";
Float64 colorBarMaximum 10.0;
Float64 colorBarMinimum 0.0;
String comment "Variance Threshold QC Test - Test applies to each vector. Threshold=[maximum variance=1.0 (m2/s2)]";
String conventions "EuroGOOS European HFR Node";
String flag_meanings "no_qc_performed good_data probably_good_data bad_data_that_are_potentially_correctable bad_data value_changed value_below_detection nominal_value interpolated_value missing_value";
Byte flag_values 0, 1, 2, 3, 4, 5, 6, 7, 8, 9;
String long_name "Variance threshold quality flag";
String units "1";
Byte valid_max 9;
Byte valid_min 0;
}
MDFL_QC {
Byte _FillValue -127;
String _Unsigned "false";
Float64 colorBarMaximum 10.0;
Float64 colorBarMinimum 0.0;
String comment "Median Filter QC Test - Test applies to each vector. Thresholds=[distance limit=5.0 (km) velocity-median difference threshold=1.0 (m/s)]";
String conventions "EuroGOOS European HFR Node";
String flag_meanings "no_qc_performed good_data probably_good_data bad_data_that_are_potentially_correctable bad_data value_changed value_below_detection nominal_value interpolated_value missing_value";
Byte flag_values 0, 1, 2, 3, 4, 5, 6, 7, 8, 9;
String long_name "Median filter quality flag";
String units "1";
Byte valid_max 9;
Byte valid_min 0;
}
AVRB_QC {
Byte _FillValue -127;
String _Unsigned "false";
Float64 colorBarMaximum 10.0;
Float64 colorBarMinimum 0.0;
String comment "Average Radial Bearing QC Test - Test applies to entire file. Thresholds=[minimum bearing=0.0 (degrees) - maximum bearing=360.0 (degrees)]";
String conventions "EuroGOOS European HFR Node";
String flag_meanings "no_qc_performed good_data probably_good_data bad_data_that_are_potentially_correctable bad_data value_changed value_below_detection nominal_value interpolated_value missing_value";
Byte flag_values 0, 1, 2, 3, 4, 5, 6, 7, 8, 9;
String long_name "Average radial bearing quality flag";
String units "1";
Byte valid_max 9;
Byte valid_min 0;
}
RDCT_QC {
Byte _FillValue -127;
String _Unsigned "false";
Float64 colorBarMaximum 10.0;
Float64 colorBarMinimum 0.0;
String comment "Radial Count QC Test - Test applies to entire file. Threshold=[minimum number of radial vectors=200]";
String conventions "EuroGOOS European HFR Node";
String flag_meanings "no_qc_performed good_data probably_good_data bad_data_that_are_potentially_correctable bad_data value_changed value_below_detection nominal_value interpolated_value missing_value";
Byte flag_values 0, 1, 2, 3, 4, 5, 6, 7, 8, 9;
String long_name "Radial count quality flag";
String units "1";
Byte valid_max 9;
Byte valid_min 0;
}
QCflag {
Byte _FillValue -127;
String _Unsigned "false";
Float64 colorBarMaximum 10.0;
Float64 colorBarMinimum 0.0;
String comment "Overall QC Flag - Test applies to each vector. Test checks if all QC tests are passed.";
String conventions "EuroGOOS European HFR Node";
String flag_meanings "no_qc_performed good_data probably_good_data bad_data_that_are_potentially_correctable bad_data value_changed value_below_detection nominal_value interpolated_value missing_value";
Byte flag_values 0, 1, 2, 3, 4, 5, 6, 7, 8, 9;
String long_name "Overall quality flag";
String units "1";
Byte valid_max 9;
Byte valid_min 0;
}
DRVA {
Float64 _FillValue -2147483.647;
String ancillary_variables "QCflag OWTR_QC MDFL_QC AVRB_QC RDCT_QC";
Float64 colorBarMaximum 360.0;
Float64 colorBarMinimum 0.0;
String long_name "Direction of radial vector away from instrument";
String sdn_P02_urn "SDN:P02::RFVL";
String sdn_parameter_name "Direction (from) of radial vector relative to instrument and True North in the water body by high frequency radar";
String sdn_parameter_urn "SDN:P01::HFRVWD01";
String sdn_uom_name "Degrees True";
String sdn_uom_urn "SDN:P06::UABB";
String standard_name "direction_of_radial_vector_away_from_instrument";
String units "degree_true";
Float64 valid_max 360.0;
Float64 valid_min 0.0;
}
RDVA {
Float64 _FillValue -32.767;
String ancillary_variables "QCflag OWTR_QC MDFL_QC CSPD_QC VART_QC RDCT_QC";
Float64 colorBarMaximum 0.5;
Float64 colorBarMinimum -0.5;
String long_name "Radial sea water velocity away from instrument";
String sdn_P02_urn "SDN:P02::RFVL";
String sdn_parameter_name "Speed of water current in the water body by high frequency radar and cell averaging";
String sdn_parameter_urn "SDN:P01::HFRDCRSP";
String sdn_uom_name "Metres per second";
String sdn_uom_urn "SDN:P06::UVAA";
String standard_name "radial_sea_water_velocity_away_from_instrument";
String units "m s-1";
Float64 valid_max 10.0;
Float64 valid_min -10.0;
}
EWCT {
Float64 _FillValue -32.767;
String ancillary_variables "QCflag OWTR_QC MDFL_QC CSPD_QC VART_QC AVRB_QC RDCT_QC";
Float64 colorBarMaximum 0.5;
Float64 colorBarMinimum -0.5;
String long_name "Surface eastward sea water velocity";
String sdn_P02_urn "SDN:P02::RFVL";
String sdn_parameter_name "Eastward velocity of water current in the water body";
String sdn_parameter_urn "SDN:P01::LCEWZZ01";
String sdn_uom_name "Metres per second";
String sdn_uom_urn "SDN:P06::UVAA";
String standard_name "surface_eastward_sea_water_velocity";
String units "m s-1";
Float64 valid_max 10.0;
Float64 valid_min -10.0;
}
NSCT {
Float64 _FillValue -32.767;
String ancillary_variables "QCflag OWTR_QC MDFL_QC CSPD_QC VART_QC AVRB_QC RDCT_QC";
Float64 colorBarMaximum 0.5;
Float64 colorBarMinimum -0.5;
String long_name "Surface northward sea water velocity";
String sdn_P02_urn "SDN:P02::RFVL";
String sdn_parameter_name "Northward current velocity in the water body";
String sdn_parameter_urn "SDN:P01::LCNSZZ01";
String sdn_uom_name "Metres per second";
String sdn_uom_urn "SDN:P06::UVAA";
String standard_name "surface_northward_sea_water_velocity";
String units "m s-1";
Float64 valid_max 10.0;
Float64 valid_min -10.0;
}
POSITION_QC {
Byte _FillValue -127;
String _Unsigned "false";
Float64 colorBarMaximum 10.0;
Float64 colorBarMinimum 0.0;
String comment "Quality flagging for position coordinates.";
String conventions "EuroGOOS European HFR Node";
String flag_meanings "no_qc_performed good_data probably_good_data bad_data_that_are_potentially_correctable bad_data value_changed value_below_detection nominal_value interpolated_value missing_value";
Byte flag_values 0, 1, 2, 3, 4, 5, 6, 7, 8, 9;
String long_name "Position quality flag";
String units "1";
Byte valid_max 9;
Byte valid_min 0;
}
NC_GLOBAL {
String acknowledgement "The COSYNA HF Radar Network has been installed and maintained jointly by the Helmholtz Zentrum Geesthacht and Helzel Meestechnik GMBH.";
String area "German Bight";
String calibration_link "jochen.horstmann@hzg.de";
String calibration_type "Full";
String cdm_data_type "Grid";
String citation "These data were collected and made freely available by the EuroGOOS European HFR Node. Data collected and processed by the Helmholtz Zentrum Geesthacht";
String comment "Total velocities are derived using least square fit that maps radial velocities measured from individual sites onto a cartesian grid. The final product is a map of the horizontal components of the ocean currents on a regular grid in the area of overlap of two or more radar stations.";
String contributor_email "jochen.horstmann@hzg.de; widera@helzel.com";
String contributor_name "Jochen Horstmann; Jan Widera";
String contributor_role "Project Leader; Advisor";
String Conventions "CF-1.11, EuroGOOS European HFR Node, COARDS, ACDD-1.3";
String creator_email "lorenzo.corgnati@sp.ismar.cnr.it";
String creator_name "Lorenzo Corgnati";
String creator_type "person";
String creator_url "https://www.hfrnode.eu/";
String data_assembly_center "European HFR Node";
String data_character_set "utf8";
String data_language "eng";
String data_mode "R";
String data_type "HF radar radial current data";
String date_created "2025-05-06T13:34:32Z";
String date_modified "2025-05-06T13:34:32Z";
String distribution_statement "These data are public and free of charge. User assumes all risk for use of data. User must display citation in any publication or product using data. User must contact PI prior to any commercial use of data.";
String doa_estimation_method "Beam Forming";
Float64 Easternmost_Easting 8.970864;
String format_version "v3";
Float64 geospatial_lat_max 55.2;
Float64 geospatial_lat_min 53.41814;
Float64 geospatial_lat_resolution 0.017998585858585877;
String geospatial_lat_units "degrees_north";
Float64 geospatial_lon_max 8.970864;
Float64 geospatial_lon_min 5.916667;
Float64 geospatial_lon_resolution 0.03085047474747475;
String geospatial_lon_units "degrees_east";
String history
"Data measured at 2022-11-30T23:39:00Z. netCDF file created at 2025-05-06T13:34:32Z by the European HFR Node.
2026-02-21T20:57:26Z (local files)
2026-02-21T20:57:26Z http://erddap.emodnet-physics.eu/erddap/griddap/EUHFR_NRTcurrent_HFR-COSYNA-SYLT.das";
String id "HFR-COSYNA-SYLT_2022-11-30T23:39:00Z";
String infoUrl "https://www.hfrnode.eu/";
String institution "Helmholtz Zentrum Geesthacht";
String institution_edmo_code "2842";
String institution_references "https://www.hzg.de";
String keywords "accuracy, average, AVRB_QC, away, bearing, circulation, cosyna, count, coverage, CSPD_QC, current, currents, data, depth, direction, direction_of_radial_vector_away_from_instrument, DRVA, EACC, earth, Earth Science > Oceans > Ocean Circulation > Ocean Currents, eastward, EWCT, filter, flag, frequency, geesthacht, HCSS, helmholtz, HF, hf radar, hfr, hfr-cosyna-sylt, hfradar, high, instrument, latitude, longitude, MDFL_QC, median, near, near real time, northward, NSCT, ocean, ocean currents, oceans, over, over-water, overall, OWTR_QC, period, position, POSITION_QC, QCflag, quality, radar, radial, radial_sea_water_velocity_away_from_instrument, RDCT_QC, RDVA, real, science, scr-hf, sea, seawater, surface, surface water, surface_eastward_sea_water_velocity, surface_northward_sea_water_velocity, sylt, threshold, time, variance, VART_QC, vector, velocity, water, zentrum";
String keywords_vocabulary "GCMD Science Keywords";
String last_calibration_date "2007-02-09T00:00:00Z";
String license "HF radar sea surface current velocity dataset by COSYNA is licensed under a Creative Commons Attribution 4.0 International License. You should have received a copy of the license along with this work. If not, see https://creativecommons.org/licenses/by/4.0/.";
String manufacturer "WERA";
String metadata_character_set "utf8";
String metadata_contact "lorenzo.corgnati@sp.ismar.cnr.it";
String metadata_date_stamp "2025-05-06T13:34:32Z";
String metadata_language "eng";
String naming_authority "eu.hfrnode";
String netcdf_format "NETCDF4_CLASSIC";
String netcdf_version "4.9.3";
String network "COSYNA HFR Network";
Float64 Northernmost_Northing 55.2;
String oceanops_ref "6204705";
String platform_code "HFR-COSYNA-SYLT";
String processing_level "2B";
String project "Not Available";
String publisher_email "euhfrnode@azti.es";
String publisher_name "European HFR Node";
String publisher_type "institution";
String publisher_url "https://www.hfrnode.eu/";
String qc_manual "Recommendation Report 2 on improved common procedures for HFR QC analysis: https://dx.doi.org/10.25607/OBP-944";
String reference_system "EPSG:4326";
String references "Recommendation Report 2 on improved common procedures for HFR QC analysis: https://dx.doi.org/10.25607/OBP-944";
String sensor_model "WERA";
String site_code "HFR-COSYNA";
String software_name "EU_HFR_NODE_NRTprocessor";
String software_version "v3";
String source "coastal structure";
String source_platform_category_code "17";
String sourceUrl "(local files)";
Float64 Southernmost_Northing 53.41814;
String standard_name_vocabulary "CF Standard Name Table v70";
String summary "The data set consists of maps of radial velocity of the sea water surface current collected at Sylt (SYLT ) site in the German Bight (North Sea). Data are averaged over a time interval of 20 minutes. High Frequency (HF)-RADAR measurements of ocean velocity are radial in direction relative to the radar location and representative of the upper 0.3-2.5 meters of the ocean.";
String time_coverage_duration "PT20M";
String time_coverage_end "2024-05-04T23:39:00Z";
String time_coverage_resolution "PT20M";
String time_coverage_start "2019-11-11T10:00:00Z";
String title "Near Real Time Surface Ocean Radial Velocity by HFR-COSYNA-SYLT";
String topic_category "oceans";
String update_interval "void";
Float64 Westernmost_Easting 5.916667;
String wigos_id "0-22000-0-6204705";
String wmo_platform_code "6204705";
}
}
Data Access Protocol (DAP) and its
projection constraints.
The URL specifies what you want: the dataset, a description of the graph or the subset of the data, and the file type for the response.
griddap request URLs must be in the form
https://coastwatch.pfeg.noaa.gov/erddap/griddap/datasetID.fileType{?query}
For example,
https://coastwatch.pfeg.noaa.gov/erddap/griddap/jplMURSST41.htmlTable?analysed_sst[(2002-06-01T09:00:00Z)][(-89.99):1000:(89.99)][(-179.99):1000:(180.0)]
Thus, the query is often a data variable name (e.g., analysed_sst),
followed by [(start):stride:(stop)]
(or a shorter variation of that) for each of the variable's dimensions
(for example, [time][latitude][longitude]).
For details, see the griddap Documentation.