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Dataset Title:	Near Real Time Surface Ocean Velocity by HFR_LaMMa
Institution:	Consorzio LaMMA (Dataset ID: RADAR_LIVO_2019_29d8_f095_dd26)
Information:	Summary \| License \| Metadata \| Background \| Data Access Form \| Files

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depth (m)

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BEAR (degree_true)

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RNGE (km)

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Things You Can Do With Your Graphs

Well, you can do anything you want with your graphs, of course. But some things you might not have considered are:

Web page authors can embed a graph of the latest data in a web page using HTML <img> tags.
Anyone can use ERDDAPs Slide Sorter to build a personal web page that displays graphs with the latest data (or other images or HTML content), each in its own, draggable slide.

The Dataset Attribute Structure (.das) for this Dataset

Attributes {
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.5463008e+9, 1.5778332e+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";
    Float64 valid_max 90000.0;
    Float64 valid_min -90000.0;
  }
  depth {
    String _CoordinateAxisType "Height";
    String _CoordinateZisPositive "down";
    Int16 actual_range 0, 0;
    String axis "Z";
    String ioos_category "Location";
    String long_name "Depth";
    String positive "down";
    String standard_name "depth";
    String units "m";
  }
  BEAR {
    Float32 actual_range 4.0, 359.0;
    String ancillary_variables "POSITION_QC";
    String axis "X";
    String ioos_category "Unknown";
    String long_name "Bearing away from instrument";
    String sdn_P02_urn "SDN:P02::ALAT";
    String sdn_parameter_name "Bearing";
    String sdn_parameter_urn "SDN:P01::BEARRFTR";
    String sdn_uom_name "Degrees true";
    String sdn_uom_urn "SDN:P06::UABB";
    String units "degree_true";
    Float32 valid_max 360.0;
    Float32 valid_min 0.0;
  }
  RNGE {
    Float32 actual_range 0.0, 149.4999;
    String ancillary_variables "POSITION_QC";
    String axis "Y";
    String ioos_category "Unknown";
    String long_name "Range away from instrument";
    String sdn_P02_urn "SDN:P02::ALAT";
    String sdn_parameter_name "Range (from fixed reference point) by unspecified GPS system";
    String sdn_parameter_urn "SDN:P01::RIFNAX01";
    String sdn_uom_name "Kilometres";
    String sdn_uom_urn "SDN:P06::ULKM";
    String units "km";
    Float32 valid_max 90000.0;
    Float32 valid_min 0.0;
  }
  RDVA {
    Float32 _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 data_mode "R";
    String ioos_category "Currents";
    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 (Eulerian measurement) in the water body by directional range-gated radar";
    String sdn_parameter_urn "SDN:P01::LCSAWVRD";
    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";
    Float32 valid_max 10.0;
    Float32 valid_min -10.0;
  }
  DRVA {
    Float32 _FillValue 2147483.8;
    String ancillary_variables "QCflag, OWTR_QC, MDFL_QC, AVRB_QC, RDCT_QC";
    Float64 colorBarMaximum 360.0;
    Float64 colorBarMinimum 0.0;
    String data_mode "R";
    String ioos_category "Currents";
    String long_name "Direction of radial vector away from instrument";
    String sdn_P02_urn "SDN:P02::RFVL";
    String sdn_parameter_name "Direction (towards) of water current (Eulerian measurement) in the water body by directional range-gated radar";
    String sdn_parameter_urn "SDN:P01::LCDAWVRD";
    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";
    Float32 valid_max 360.0;
    Float32 valid_min 0.0;
  }
  EWCT {
    Float32 _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 data_mode "R";
    String ioos_category "Currents";
    String long_name "West-east current component";
    String sdn_P02_urn "SDN:P02::RFVL";
    String sdn_parameter_name "Eastward current velocity 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 "eastward_sea_water_velocity";
    String units "m s-1";
    Float32 valid_max 10.0;
    Float32 valid_min -10.0;
  }
  NSCT {
    Float32 _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 data_mode "R";
    String ioos_category "Currents";
    String long_name "South-north current component";
    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 "northward_sea_water_velocity";
    String units "m s-1";
    Float32 valid_max 10.0;
    Float32 valid_min -10.0;
  }
  ESPC {
    Float32 _FillValue 32.767;
    String ancillary_variables "QCflag, VART_QC";
    Float64 colorBarMaximum 0.1;
    Float64 colorBarMinimum 0.0;
    String data_mode "R";
    String ioos_category "Statistics";
    String long_name "Radial standard deviation of current velocity over the scatter patch";
    String sdn_uom_name "Metres per second";
    String sdn_uom_urn "SDN:P06::UVAA";
    String units "m s-1";
    Float32 valid_max 32.0;
    Float32 valid_min -32.0;
  }
  ETMP {
    Float32 _FillValue 32.767;
    String ancillary_variables "QCflag, VART_QC";
    Float64 colorBarMaximum 0.1;
    Float64 colorBarMinimum 0.0;
    String data_mode "R";
    String ioos_category "Statistics";
    String long_name "Radial standard deviation 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";
    Float32 valid_max 32.0;
    Float32 valid_min -32.0;
  }
  MAXV {
    Float32 _FillValue 32.767;
    String ancillary_variables "QCflag, MDFL_QC, CSPD_QC, VART_QC";
    Float64 colorBarMaximum 15.0;
    Float64 colorBarMinimum -15.0;
    String data_mode "R";
    String ioos_category "Currents";
    String long_name "Radial sea water velocity away from instrument maximum";
    String sdn_P02_urn "SDN:P02::RFVL";
    String sdn_parameter_name "Current speed (Eulerian) in the water body by directional range-gated radar";
    String sdn_parameter_urn "SDN:P01::LCSAWVRD";
    String sdn_uom_name "Metres per second";
    String sdn_uom_urn "SDN:P06::UVAA";
    String units "m s-1";
    Float32 valid_max 10.0;
    Float32 valid_min -10.0;
  }
  MINV {
    Float32 _FillValue 32.767;
    String ancillary_variables "QCflag, MDFL_QC, CSPD_QC, VART_QC";
    Float64 colorBarMaximum 15.0;
    Float64 colorBarMinimum -15.0;
    String data_mode "R";
    String ioos_category "Currents";
    String long_name "Radial sea water velocity away from instrument minimum";
    String sdn_P02_urn "SDN:P02::RFVL";
    String sdn_parameter_name "Current speed (Eulerian) in the water body by directional range-gated radar";
    String sdn_parameter_urn "SDN:P01::LCSAWVRD";
    String sdn_uom_name "Metres per second";
    String sdn_uom_urn "SDN:P06::UVAA";
    String units "m s-1";
    Float32 valid_max 10.0;
    Float32 valid_min -10.0;
  }
  ERSC {
    Int16 _FillValue 32767;
    String ancillary_variables "QCflag";
    Float64 colorBarMaximum 100.0;
    Float64 colorBarMinimum 0.0;
    String data_mode "R";
    String ioos_category "Statistics";
    String long_name "Radial sea water velocity spatial quality count";
    String sdn_uom_name "Dimensionless";
    String sdn_uom_urn "SDN:P06::UUUU";
    String units "1";
    Int16 valid_max 127;
    Int16 valid_min 0;
  }
  ERTC {
    Int16 _FillValue 32767;
    String ancillary_variables "QCflag";
    Float64 colorBarMaximum 100.0;
    Float64 colorBarMinimum 0.0;
    String data_mode "R";
    String ioos_category "Statistics";
    String long_name "Radial sea water velocity temporal quality count";
    String sdn_uom_name "Dimensionless";
    String sdn_uom_urn "SDN:P06::UUUU";
    String units "1";
    Int16 valid_max 127;
    Int16 valid_min 0;
  }
  SPRC {
    Int16 _FillValue 32767;
    String ancillary_variables "QCflag, OWTR_QC, MDFL_QC, CSPD_QC, VART_QC";
    Float64 colorBarMaximum 150.0;
    Float64 colorBarMinimum 0.0;
    String data_mode "R";
    String ioos_category "Currents";
    String long_name "Radial sea water velocity cross spectra range cell";
    String sdn_uom_name "Dimensionless";
    String sdn_uom_urn "SDN:P06::UUUU";
    String units "1";
    Int16 valid_max 127;
    Int16 valid_min 0;
  }
  POSITION_QC {
    Byte _FillValue 127;
    String _Unsigned "false";
    Float64 colorBarMaximum 10.0;
    Float64 colorBarMinimum 0.0;
    String comment "OceanSITES quality flagging for position coordinates";
    String conventions "Copernicus Marine In Situ reference table 2";
    String flag_meanings "no_qc_performed good_data probably_good_data bad_data_that_are_potentially_correctable bad_data value_changed not_used nominal_value interpolated_value missing_value";
    Byte flag_values 0, 1, 2, 3, 4, 5, 6, 7, 8, 9;
    String ioos_category "Quality";
    String long_name "Position 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 "OceanSITES quality flagging for all QC tests.";
    String conventions "Copernicus Marine In Situ reference table 2";
    String flag_meanings "no_qc_performed good_data probably_good_data bad_data_that_are_potentially_correctable bad_data value_changed not_used nominal_value interpolated_value missing_value";
    Byte flag_values 0, 1, 2, 3, 4, 5, 6, 7, 8, 9;
    String ioos_category "Quality";
    String long_name "Overall quality flag";
    String units "1";
    Byte valid_max 9;
    Byte valid_min 0;
  }
  OWTR_QC {
    Byte _FillValue 127;
    String _Unsigned "false";
    Float64 colorBarMaximum 10.0;
    Float64 colorBarMinimum 0.0;
    String comment "OceanSITES quality flagging for Over-water QC test.";
    String conventions "Copernicus Marine In Situ reference table 2";
    String flag_meanings "no_qc_performed good_data probably_good_data bad_data_that_are_potentially_correctable bad_data value_changed not_used nominal_value interpolated_value missing_value";
    Byte flag_values 0, 1, 2, 3, 4, 5, 6, 7, 8, 9;
    String ioos_category "Quality";
    String long_name "Over-water 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 "OceanSITES quality flagging for Median Filter QC test. Threshold set to 5 km, 30 deg, 1 m/s,";
    String conventions "Copernicus Marine In Situ reference table 2";
    String flag_meanings "no_qc_performed good_data probably_good_data bad_data_that_are_potentially_correctable bad_data value_changed not_used nominal_value interpolated_value missing_value";
    Byte flag_values 0, 1, 2, 3, 4, 5, 6, 7, 8, 9;
    String ioos_category "Quality";
    String long_name "Median filter 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 "OceanSITES quality flagging for Variance Threshold QC test. Test not applicable to Direction Finding systems. The Temporal Derivative test is applied. Threshold set to 1 m/s.";
    String conventions "Copernicus Marine In Situ reference table 2";
    String flag_meanings "no_qc_performed good_data probably_good_data bad_data_that_are_potentially_correctable bad_data value_changed not_used nominal_value interpolated_value missing_value";
    Byte flag_values 0, 1, 2, 3, 4, 5, 6, 7, 8, 9;
    String ioos_category "Statistics";
    String long_name "Variance threshold 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 "OceanSITES quality flagging for Velocity Threshold QC test. Threshold set to 1.2 m/s.";
    String conventions "Copernicus Marine In Situ reference table 2";
    String flag_meanings "no_qc_performed good_data probably_good_data bad_data_that_are_potentially_correctable bad_data value_changed not_used nominal_value interpolated_value missing_value";
    Byte flag_values 0, 1, 2, 3, 4, 5, 6, 7, 8, 9;
    String ioos_category "Quality";
    String long_name "Velocity threshold quality flag";
    String units "1";
    Byte valid_max 9;
    Byte valid_min 0;
  }
  NC_GLOBAL {
    String acknowledgement "Consorzio LaMMA HF Radar Network has been established within SICOMAR, SICOMAR plus and IMPACT projects. The network has been designed, implemented and managed through the efforts of Consorzio LaMMA.";
    String AngularResolution "5 Deg";
    String AntennaBearing "299.0 True";
    String area "Mediterranean Sea";
    String BraggHasSecondOrder "1";
    String BraggSmoothingPoints "2";
    String calibration_link "costanza@lamma.rete.toscana.it";
    String calibration_type "APM";
    String cdm_data_type "Grid";
    String citation "These data were collected and made freely available by the Copernicus project and the programs that contribute to it. Data collected and processed by SICOMAR, SICOMAR plus and IMPACT projects.";
    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 contact "euhfrnode@azti.es cmems-service@ifremer.fr";
    String contributor_email "brandini@lamma.rete.toscana.it;taddei@lamma.rete.toscana.it;doronzo@lamma.rete.toscana.it;costanza@lamma.rete.toscana.it";
    String contributor_name "Carlo Brandini;Stefano Taddei;Bartolomeo Doronzo;Letizia Costanza";
    String contributor_role "HFR experts";
    String Conventions "CF-1.6 Copernicus-InSituTAC-FormatManual-1.41 Copernicus-InSituTAC-SRD-1.5 Copernicus-InSituTAC-ParametersList-3.2.0, COARDS, ACDD-1.3";
    String creator_email "euhfrnode@azti.es";
    String creator_name "EUHFRNODE";
    String creator_type "institution";
    String creator_url "http://marine.copernicus.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 data";
    String date_created "2021-06-05T21:16:16Z";
    String date_issued "2021-06-05T21:16:16Z";
    String date_modified "2021-06-05T21:16:16Z";
    String date_update "2021-06-05T21:16:37Z";
    String distribution_statement "These data follow Copernicus standards; they 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 "Direction Finding";
    String DOI "https://doi.org/10.80359/d2d8-7w51";
    String DopplerResolutionHzPerBin "0.001953125";
    String feature_type "surface";
    String FirstOrderCalc "1";
    String FirstOrderMethod "0";
    String format_version "1.4";
    String history 
"2019-12-31T23:00:00Z data collected. 2021-06-05T21:16:16Z netCDF file created and sent to European HFR Node
2025-01-09T23:17:47Z (local files)
2025-01-09T23:17:47Z https://erddap.lamma.toscana.it/griddap/RADAR_LIVO_2019_29d8_f095_dd26.das";
    String id "HFR-LaMMA-LIVO_2019-12-31T23:00:00Z";
    String infoUrl "http://marine.copernicus.eu";
    String institution "Consorzio LaMMA";
    String institution_edmo_code "5064";
    String institution_references "http://www.lamma.rete.toscana.it/";
    String keywords "away, bear, cell, circulation, component, consorzio, count, coverage, cross, CSPD_QC, current, currents, data, depth, deviation, direction, direction_of_radial_vector_away_from_instrument, DRVA, earth, Earth Science > Oceans > Ocean Circulation > Ocean Currents, east, eastward, eastward_sea_water_velocity, ERSC, ERTC, ESPC, ETMP, EWCT, filter, flag, frequency, HF, hf radar, hfr, hfradar, high, instrument, lamma, maximum, MAXV, MDFL_QC, median, minimum, MINV, near, near real time, north, northward, northward_sea_water_velocity, NSCT, ocean, ocean currents, oceans, over, over-water, overall, OWTR_QC, patch, period, position, POSITION_QC, QCflag, quality, radar, radial, radial_sea_water_velocity_away_from_instrument, range, RDVA, real, rnge, scatter, science, scr-hf, sea, seawater, south, south-north, spatial, spectra, SPRC, standard, statistics, surface, surface water, temporal, threshold, time, variance, VART_QC, vector, velocity, water, west, west-east";
    String keywords_vocabulary "GCMD Science Keywords";
    String last_calibration_date "2016-08-31T00:00:00Z";
    String license "HF radar sea surface current velocity dataset by CNR-ISMAR 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 "CODAR Ocean Sensors. SeaSonde";
    String MergedCount "7";
    String MergeMethod "1 MedianVectors";
    String metadata_character_set "utf8";
    String metadata_contact "lorenzo.corgnati@sp.ismar.cnr.it";
    String metadata_date_stamp "2021-06-05T21:16:16Z";
    String metadata_language "eng";
    String naming_authority "Copernicus Marine In Situ";
    String netcdf_format "netcdf4_classic";
    String netcdf_version "netCDF-4 classic model";
    String network "LaMMA_HFR Network in the Tuscany Archipelago (Tyrrhenian Sea)";
    String PatternAmplitudeCalculations "0.3404  1.2927";
    String PatternAmplitudeCorrections "0.5898  1.8714";
    String PatternMethod "1 PatternVectors";
    String PatternPhaseCalculations "-105.90  -38.00";
    String PatternPhaseCorrections "-125.70  -39.50";
    String PatternResolution "1.0 deg";
    String platform_code "HFR-LaMMA-LIVO";
    String platform_name "HFR-LaMMA-LIVO";
    String processing_level "2B";
    String project "SICOMAR, SICOMAR plus, IMPACT";
    String publisher_email "euhfrnode@azti.es";
    String publisher_name "European HFR Node";
    String publisher_type "institution";
    String publisher_url "http://eurogoos.eu/";
    String RadialBraggNoiseThreshold "5.000";
    String RadialBraggPeakDropOff "630.960";
    String RadialBraggPeakNull "100.000";
    String RadialMinimumMergePoints "2";
    String RadialMusicParameters "40.000 20.000 2.000";
    String RangeEnd "74";
    String RangeResolutionKMeters "1.510100";
    String RangeStart "2";
    String reference_system "EPSG:4806";
    String ReferenceBearing "0 True";
    String references "http://marine.copernicus.eu http://www.marineinsitu.eu http://www.marineinsitu.eu/wp-content/uploads/2018/02/HFR_Data_Model_Reference_Card_v1.pdf";
    String sensor "CODAR SeaSonde";
    String site_code "HFR-LaMMA";
    String software_name "HFR_Node__Centralized_Processing";
    String software_version "v2.2";
    String source "coastal structure";
    String source_platform_category_code "17";
    String sourceUrl "(local files)";
    String SpatialResolution "5 Deg";
    String SpectraDopplerCells "1024";
    String SpectraRangeCells "74";
    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 Livorno (LIVO) site in the Tuscany Archipelago (Tyrrhenian Sea). Data are averaged over a time interval of 1 hour around the cardinal hour. 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 "PT1H";
    String time_coverage_end "2019-12-31T23:00:00Z";
    String time_coverage_resolution "PT1H";
    String time_coverage_start "2019-01-01T00:00:00Z";
    String title "Near Real Time Surface Ocean Velocity by HFR_LaMMa";
    String topic_category "oceans";
    String TransmitBandwidthKHz "-99.259377";
    String TransmitCenterFreqMHz "13.500000";
    String TransmitSweepRateHz "2.000000";
    String update_interval "void";
  }
}

Using griddap to Request Data and Graphs from Gridded Datasets

griddap lets you request a data subset, graph, or map from a gridded dataset (for example, sea surface temperature data from a satellite), via a specially formed URL. griddap uses the OPeNDAP (external link)

Data Access Protocol (DAP) (external link)

and its projection constraints (external link)

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.

(easy) You can get data by using the dataset's Data Access Form. It makes the URL for you.
(easy) You can make a graph or map by using the dataset's Make A Graph form. It makes the URL for you.
(not hard) You can bypass the forms and get the data or make a graph or map by generating the URL by hand or with a computer program or script.

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.