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Dataset Title:  Surface Currents - SWARM - 25MHz - Reprocessed with QARTOD radials Subscribe RSS
Institution:  Center for Ocean Observing and Leadership, Department of Marine & Coastal Sciences, Rutgers University   (Dataset ID: swarm_25mz_totals_reprocessed_with_qc_radials)
Information:  Summary ? | License ? | FGDC | ISO 19115 | Metadata | Background (external link) | Data Access Form
 
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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:

The Dataset Attribute Structure (.das) for this Dataset

Attributes {
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.577664e+9, 1.5837552e+9;
    String axis "T";
    String calendar "gregorian";
    String ioos_category "Time";
    String long_name "Time";
    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 _FillValue 0.0;
    Float32 actual_range 0.0, 0.0;
    String axis "Z";
    String comment "Derived from mean value of depth variable";
    String ioos_category "Location";
    String long_name "Depth";
    String positive "down";
    String source_name "z";
    String standard_name "depth";
    String units "m";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float32 _FillValue 0.0;
    Float32 actual_range -65.43221, -64.5329;
    String axis "Y";
    String ioos_category "Location";
    String long_name "Latitude";
    String short_name "lat";
    String standard_name "latitude";
    String units "degrees_north";
    Float32 valid_max 90.0;
    Float32 valid_min -90.0;
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float32 _FillValue 0.0;
    Float32 actual_range -65.50191, -63.41043;
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String short_name "lon";
    String standard_name "longitude";
    String units "degrees_east";
    Float32 valid_max 180.0;
    Float32 valid_min -180.0;
  }
  u {
    Float32 _FillValue -999.0;
    String ancillary_variables "qc16_maxspeed qc18_validlocation qc19_uerr qc20_verr qc_primary_flag qc_operator_mask";
    Float64 colorBarMaximum 0.5;
    Float64 colorBarMinimum -0.5;
    String grid_mapping "crs";
    String ioos_category "Currents";
    String long_name "Eastward Surface Current (cm/s)";
    String short_name "u";
    String standard_name "surface_eastward_sea_water_velocity";
    String units "cm/s";
    Float32 valid_max 300.0;
    Float32 valid_min -300.0;
  }
  v {
    Float32 _FillValue -999.0;
    String ancillary_variables "qc16_maxspeed qc18_validlocation qc19_uerr qc20_verr qc_primary_flag qc_operator_mask";
    Float64 colorBarMaximum 0.5;
    Float64 colorBarMinimum -0.5;
    String grid_mapping "crs";
    String ioos_category "Currents";
    String long_name "Northward Surface Current (cm/s)";
    String short_name "v";
    String standard_name "surface_northward_sea_water_velocity";
    String units "cm/s";
    Float32 valid_max 300.0;
    Float32 valid_min -300.0;
  }
  u_err {
    Float32 _FillValue -999.0;
    Float64 colorBarMaximum 0.1;
    Float64 colorBarMinimum 0.0;
    String comment "velocity measurements with error values over 0.6 are of questionable quality";
    String grid_mapping "crs";
    String ioos_category "Statistics";
    String long_name "Normalized uncertainty error associated with eastward velocity component";
    String units "1";
    Float32 valid_max 1.0;
    Float32 valid_min 0.0;
  }
  v_err {
    Float32 _FillValue -999.0;
    Float64 colorBarMaximum 0.1;
    Float64 colorBarMinimum 0.0;
    String comment "velocity measurements with error values over 0.6 are of questionable quality";
    String grid_mapping "crs";
    String ioos_category "Statistics";
    String long_name "Normalized uncertainty error associated with northward velocity component";
    String units "1";
    Float32 valid_max 1.0;
    Float32 valid_min 0.0;
  }
  uv_covariance {
    Float32 _FillValue -999.0;
    Float64 colorBarMaximum 0.1;
    Float64 colorBarMinimum 0.0;
    String comment "directional information of u and v";
    String grid_mapping "crs";
    String ioos_category "Statistics";
    String long_name "Eastward and Northward covariance directional information of u and v";
    String units "1";
  }
  num_radials {
    Float64 _FillValue -999.0;
    Float64 colorBarMaximum 100.0;
    Float64 colorBarMinimum 0.0;
    String comment "totals are not calculated with fewer than 3 contributing radial measurements from 2 sites";
    String grid_mapping "crs";
    String ioos_category "Statistics";
    String long_name "Number of radial measurements used to calculate each totals velocity";
  }
  qc16_maxspeed {
    Int32 _FillValue -999;
    Float64 colorBarMaximum 10.0;
    Float64 colorBarMinimum 0.0;
    String comment 
"Quality control reference: IOOS QARTOD HF Radar ver 1.0 May 2016
QCFlagDefinitions: 1 = pass, 2 = not_evaluated, 3 = suspect, 4 = fail, 9 = missing_data
QC16 Max Speed Threshold [max_vel = 150 (cm/s)]";
    String flag_meanings "pass not_evaluated suspect fail missing_data";
    String flag_values "1 2 3 4 9";
    String grid_mapping "crs";
    String ioos_category "Quality";
    String long_name "Sea Water Velocity Quality Flag";
    String standard_name "sea_water_velocity quality_flag";
    String units "1";
    Int32 valid_max 9;
    Int32 valid_min 1;
  }
  qc18_validlocation {
    Int32 _FillValue -999;
    Float64 colorBarMaximum 10.0;
    Float64 colorBarMinimum 0.0;
    String comment 
"Quality control reference: IOOS QARTOD HF Radar ver 1.0 May 2016
QCFlagDefinitions: 1 = pass, 2 = not_evaluated, 3 = suspect, 4 = fail, 9 = missing_data
QC18 Valid Location [landmask file = /Users/mikesmith/Documents/GitHub/rucool/totals_toolbox/totals/mask_files/25MHz_1kmMask.txt]";
    String flag_meanings "pass not_evaluated suspect fail missing_data";
    String flag_values "1 2 3 4 9";
    String grid_mapping "crs";
    String ioos_category "Quality";
    String long_name "Sea Water Velocity Location Test Quality Flag";
    String standard_name "sea_water_velocity location_test_quality_flag";
    String units "1";
    Int32 valid_max 9;
    Int32 valid_min 1;
  }
  qc19_uerr {
    Int32 _FillValue -999;
    Float64 colorBarMaximum 10.0;
    Float64 colorBarMinimum 0.0;
    String comment 
"Quality control reference: IOOS QARTOD HF Radar ver 1.0 May 2016
QCFlagDefinitions: 1 = pass, 2 = not_evaluated, 3 = suspect, 4 = fail, 9 = missing_data
QC19 OI Uncertainty Threshold [OIuncert Uerr 0.7]";
    String flag_meanings "pass not_evaluated suspect fail missing_data";
    String flag_values "1 2 3 4 9";
    String grid_mapping "crs";
    String ioos_category "Quality";
    String long_name "Sea Water Velocity Quality Flag";
    String standard_name "sea_water_velocity quality_flag";
    String units "1";
    Int32 valid_max 9;
    Int32 valid_min 1;
  }
  qc20_verr {
    Int32 _FillValue -999;
    Float64 colorBarMaximum 10.0;
    Float64 colorBarMinimum 0.0;
    String comment 
"Quality control reference: IOOS QARTOD HF Radar ver 1.0 May 2016
QCFlagDefinitions: 1 = pass, 2 = not_evaluated, 3 = suspect, 4 = fail, 9 = missing_data
QC20 OI Uncertainty Threshold [OIuncert Verr 0.7]";
    String flag_meanings "pass not_evaluated suspect fail missing_data";
    String flag_values "1 2 3 4 9";
    String grid_mapping "crs";
    String ioos_category "Quality";
    String long_name "Sea Water Velocity Quality Flag";
    String standard_name "sea_water_velocity quality_flag";
    String units "1";
    Int32 valid_max 9;
    Int32 valid_min 1;
  }
  qc_primary_flag {
    Int32 _FillValue -999;
    String ancillary_variables "qc16_maxspeed qc18_validlocation qc19_uerr qc20_verr";
    Float64 colorBarMaximum 5.0;
    Float64 colorBarMinimum 0.0;
    String comment 
"QCPrimaryFlagDefinition: Highest flag value of QC16, QC18, QC19, QC20
This flag will be set to not_evaluated only if ALL individual tests were not_evaluated.";
    String flag_meanings "pass not_evaluated suspect fail";
    String flag_values "1 2 3 4";
    String grid_mapping "crs";
    String ioos_category "Quality";
    String long_name "Sea Water Velocity Aggregate Quality Flag";
    String standard_name "sea_water_velocity aggregate_quality_flag";
    String units "1";
    Int32 valid_max 4;
    Int32 valid_min 1;
  }
  qc_operator_mask {
    Int32 _FillValue -999;
    Float64 colorBarMaximum 10.0;
    Float64 colorBarMinimum 0.0;
    String comment 
"Quality control reference: IOOS QARTOD HF Radar ver 1.0 May 2016
QCFlagDefinitions: 1 = pass, 2 = not_evaluated, 3 = suspect, 4 = fail, 9 = missing_data
The qc_operator_mask follows QCFlagDefinitions and is set at discretion of the operator or data manager.";
    String flag_meanings "pass not_evaluated suspect fail missing_data";
    String flag_values "1 2 3 4 9";
    String grid_mapping "crs";
    String ioos_category "Quality";
    String long_name "Qc Operator Mask";
    String units "1";
    Int32 valid_max 9;
    Int32 valid_min 1;
  }
  NC_GLOBAL {
    String acknowledgement "This data is provided by the Rutger University, Center for Ocean Observing Leadership. Funding is provided by the U.S. National Science Foundation (NSF).";
    String cdm_data_type "Grid";
    String comment "Network maintained by University of Alaska - Fairbanks and Rutgers University. For oi_* global attribute explanations, see references attribute";
    String contributor_name "Josh Kohut, Peter Winsor, Hank Statscewich, Hugh Roarty, Ethan Handel, Michael Smith, Laura Nazzaro";
    String contributor_role "Principal Investigator, Principal Investigator, Hardware Maintenance, Manager, Maintenance, Data Manager, Data Manager";
    String Conventions "CF-1.6, ACDD-1.3, COARDS";
    String creator_email "michaesm@marine.rutgers.edu";
    String creator_institution "Rutgers University";
    String creator_name "Michael Smith";
    String creator_type "person";
    String creator_url "rucool.marine.rutgers.edu";
    String date_created "2020-10-26T18:32:52Z";
    String date_issued "2020-10-26T18:32:52Z";
    String date_metadata_modified "2020-10-26T18:32:52Z";
    String date_modified "2020-10-26T18:32:52Z";
    Float64 Easternmost_Easting -63.41043;
    Float64 geospatial_lat_max -64.5329;
    Float64 geospatial_lat_min -65.43221;
    Float64 geospatial_lat_resolution 0.008993099999999999;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -63.41043;
    Float64 geospatial_lon_min -65.50191;
    Float64 geospatial_lon_resolution 0.02091479999999997;
    String geospatial_lon_units "degrees_east";
    String history 
"Hourly codar radial data combined into one hourly file containing vectors.
2021-11-27T22:48:49Z (local files)
2021-11-27T22:48:49Z http://hfr.marine.rutgers.edu/griddap/swarm_25mz_totals_reprocessed_with_qc_radials.das";
    String infoUrl "https://maracoos.org/node/146";
    String institution "Center for Ocean Observing and Leadership, Department of Marine & Coastal Sciences, Rutgers University";
    String instrument "Network includes CODAR sites PALM, JOUB, and WAUW";
    String keywords "advisories, aggregate, antarctica, associated, calculate, center, circulation, cm/s, coastal, component, covariance, current, currents, data, deep, department, directional, each, earth, Earth Science > Oceans > Coastal Processes, Earth Science > Oceans > Ocean Circulation, Earth Science > Oceans > Ocean Circulation > Ocean Currents, Earth Science > Oceans > Ocean Tides, Earth Science > Oceans > Ocean Waves, Earth Science > Oceans > Ocean Winds, Earth Science > Spectral/Engineering > Radar, eastward, engineering, environmental, Environmental Advisories > Marine Advisories > Marine Weather/Forecast, error, flag, forecast, information, leadership, marine, mask, measurements, normalized, northward, num_radials, number, observing, ocean, oceans, operator, palmer, processes, qc16_maxspeed, qc18_validlocation, qc19_uerr, qc20_verr, qc_operator_mask, qc_primary_flag, quality, radar, radial, rutgers, science, sciences, sea, sea_water_velocity aggregate_quality_flag, sea_water_velocity location_test_quality_flag, sea_water_velocity quality_flag, seawater, spectral, spectral/engineering, statistics, surface, surface_eastward_sea_water_velocity, surface_northward_sea_water_velocity, test, tides, time, totals, u, u_err, uncertainty, university, used, uv_covariance, v, v_err, velocity, water, waves, weather, weather/forecast, winds, with";
    String keywords_vocabulary "GCMD Science Keywords";
    String license 
"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.";
    String method "Optimal Interpolation";
    String naming_authority "edu.rutgers.marine.rucool";
    Float64 Northernmost_Northing -64.5329;
    String platform "Palmer Deep, Antarctica HF Radar 25MHz Network";
    String processing_level "Level 3";
    String project "Project SWARM - High Frequency Radar Sea Surface Current Mapping";
    String publisher_email "ncei.info@noaa.gov";
    String publisher_name "NOAA National Centers for Environmental Information";
    String publisher_type "group";
    String publisher_url "www.ncei.noaa.gov";
    String references "https://maracoos.org/node/146 https://rucool.marine.rutgers.edu/facilities https://rucool.marine.rutgers.edu/data";
    String sea_name "Southern Ocean";
    String source "CODAR SeaSonde Surface Current Mapping Device";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing -65.43221;
    String standard_name_vocabulary "CF Standard Name Table v41";
    String summary "Optimally Interpolated Total Vectors calculated by HFRProgs toolbox using MATLAB. Mercator lat/lon projection";
    String time_coverage_end "2020-03-09T12:00:00Z";
    String time_coverage_start "2019-12-30T00:00:00Z";
    String title "Surface Currents - SWARM - 25MHz - Reprocessed with QARTOD radials";
    Float64 Westernmost_Easting -65.50191;
  }
}

 

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.

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[(2015-06-09T09:00:00Z)][(-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.


 
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