NOAA ERDDAP
Easier access to scientific data
Brought to you by NOAA NMFS SWFSC ERD    

ERDDAP > griddap > Data Access Form ?

Dataset Title:  Surface Currents - MARACOOS - 6km - Realtime, QARTOD QC Subscribe RSS
Institution:  Center for Ocean Observing and Leadership, Department of Marine & Coastal Sciences, Rutgers University   (Dataset ID: realtime_maracoos_6km_totals_qartod)
Information:  Summary ? | License ? | FGDC | ISO 19115 | Metadata | Background (external link) | Files | Make a graph
 
Dimensions ? Start ? Stride ? Stop ?  Size ?    Spacing ?
 time (UTC) ?      15512    1h 0m 0s (uneven)
  < slider >
 depth (m) ?      1    (just one value)
  < slider >
 latitude (degrees_north) ?      187    0.05394 (even)
  < slider >
 longitude (degrees_east) ?      196    0.05807523 (even)
  < slider >
 
Grid Variables (which always also download all of the dimension variables) 
 u (Eastward Surface Current (m/s), m/s) ?
 v (Northward Surface Current (m/s), m/s) ?
 u_err (1) ?
 v_err (1) ?
 total_errors (Associated mapping error value, sqrt(U_err^2 + Verr^2), 1) ?
 uv_covariance (Directional information of u and v, <(u_hat -u)(v_hat- v)>/sqrt(), 1) ?
 number_of_radials (Number of radial measurements used to calculate each totals velocity, 1) ?
 qc303_maxspeed (maximum speed test flag, 1) ?
 qc305_validlocation (valid location test flag, 1) ?
 qc306_uerr (Uerr flag, 1) ?
 qc307_verr (Verr flag, 1) ?
 qc_primary_flag (Primary Flag, 1) ?
 qc_operator_flag (Operator Flag, 1) ?

File type: (more information)

(Documentation / Bypass this form) ?
 
(Please be patient. It may take a while to get the data.)


 

The Dataset Attribute Structure (.das) for this Dataset

Attributes {
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.6789248e+9, 1.7347716e+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 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 actual_range 33.81852, 43.85136;
    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 actual_range -77.90598, -66.58131;
    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 -9.99;
    String ancillary_variables "qc303_maxspeed qc305_validlocation qc306_uerr qc307_verr qc_primary_flag qc_operator_flag";
    Float64 colorBarMaximum 0.5;
    Float64 colorBarMinimum -0.5;
    String ioos_category "Currents";
    String long_name "Eastward Surface Current (m/s)";
    String short_name "u";
    String standard_name "surface_eastward_sea_water_velocity";
    String units "m/s";
    Float32 valid_max 3.0;
    Float32 valid_min -3.0;
  }
  v {
    Float32 _FillValue -9.99;
    String ancillary_variables "qc303_maxspeed qc305_validlocation qc306_uerr qc307_verr qc_primary_flag qc_operator_flag";
    Float64 colorBarMaximum 0.5;
    Float64 colorBarMinimum -0.5;
    String ioos_category "Currents";
    String long_name "Northward Surface Current (m/s)";
    String short_name "v";
    String standard_name "surface_northward_sea_water_velocity";
    String units "m/s";
    Float32 valid_max 3.0;
    Float32 valid_min -3.0;
  }
  u_err {
    Float32 _FillValue -999.0;
    Float64 colorBarMaximum 1.5;
    Float64 colorBarMinimum 0.0;
    String comment "normalized by constant signal covariance for all gridpoints, velocity measurements with u_err values over 0.6 are of questionable quality";
    String ioos_category "Quality";
    String long_name "Normalized uncertainty associated with eastward velocity component, <(u_hat - u)^2>/<u^2>";
    String short_name "uerr";
    String units "1";
    Float32 valid_max 1.0;
    Float32 valid_min 0.0;
  }
  v_err {
    Float32 _FillValue -999.0;
    Float64 colorBarMaximum 1.5;
    Float64 colorBarMinimum 0.0;
    String comment "normalized by constant signal covariance for all gridpoints, velocity measurements with v_err values over 0.6 are of questionable quality";
    String ioos_category "Quality";
    String long_name "Normalized uncertainty associated with northward velocity component, <(v_hat - v)^2>/<v^2>";
    String short_name "verr";
    String units "1";
    Float32 valid_max 1.0;
    Float32 valid_min 0.0;
  }
  total_errors {
    Float32 _FillValue -999.0;
    Float64 colorBarMaximum 0.1;
    Float64 colorBarMinimum 0.0;
    String comment "velocity measurements with high total_error values are of questionable quality";
    String ioos_category "Statistics";
    String long_name "Associated mapping error value, sqrt(U_err^2 + Verr^2)";
    String short_name "totalerr";
    String units "1";
    Float32 valid_max 300.0;
    Float32 valid_min -300.0;
  }
  uv_covariance {
    Float32 _FillValue -999.0;
    Float64 colorBarMaximum 0.1;
    Float64 colorBarMinimum 0.0;
    String comment "directional information of u and v";
    String ioos_category "Statistics";
    String long_name "Directional information of u and v, <(u_hat -u)(v_hat- v)>/sqrt(<u^2><v^2>)";
    String short_name "uvcov";
    String units "1";
    Float32 valid_max 300.0;
    Float32 valid_min -300.0;
  }
  number_of_radials {
    Int16 _FillValue -999;
    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 ioos_category "Statistics";
    String long_name "Number of radial measurements used to calculate each totals velocity";
    String short_name "num_rads";
    String units "1";
  }
  qc303_maxspeed {
    Byte _FillValue 25;
    String _Unsigned "false";
    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
qc303 Max Speed Threshold [max_vel = 300 (cm/s)]";
    String flag_meanings "pass not_evaluated suspect fail missing_data";
    Byte flag_values 1, 2, 3, 4, 9;
    String ioos_category "Quality";
    String long_name "maximum speed test flag";
    String short_name "qc303";
    String standard_name "surface_eastward_sea_water_velocity status_flag";
    String units "1";
    Byte valid_max 9;
    Byte valid_min 1;
  }
  qc305_validlocation {
    Byte _FillValue 25;
    String _Unsigned "false";
    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
qc305 Valid Location [landmask file = /home/codaradm/processing_realtime/maracoos/mask_files/maracoos_06km_mask.txt]";
    String flag_meanings "pass not_evaluated suspect fail missing_data";
    Byte flag_values 1, 2, 3, 4, 9;
    String ioos_category "Quality";
    String long_name "valid location test flag";
    String short_name "qc305";
    String standard_name "surface_eastward_sea_water_velocity status_flag";
    String units "1";
    Byte valid_max 9;
    Byte valid_min 1;
  }
  qc306_uerr {
    Byte _FillValue 25;
    String _Unsigned "false";
    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
qc306 OI Uncertainty Threshold [OIuncert Uerr 0.6]";
    String flag_meanings "pass not_evaluated suspect fail missing_data";
    Byte flag_values 1, 2, 3, 4, 9;
    String ioos_category "Quality";
    String long_name "Uerr flag";
    String short_name "qc306";
    String standard_name "surface_eastward_sea_water_velocity status_flag";
    String units "1";
    Byte valid_max 9;
    Byte valid_min 1;
  }
  qc307_verr {
    Byte _FillValue 25;
    String _Unsigned "false";
    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
qc307 OI Uncertainty Threshold [OIuncert Verr 0.6]";
    String flag_meanings "pass not_evaluated suspect fail missing_data";
    Byte flag_values 1, 2, 3, 4, 9;
    String ioos_category "Quality";
    String long_name "Verr flag";
    String short_name "qc307";
    String standard_name "surface_northward_sea_water_velocity status_flag";
    String units "1";
    Byte valid_max 9;
    Byte valid_min 1;
  }
  qc_primary_flag {
    Byte _FillValue 25;
    String _Unsigned "false";
    String ancillary_variables "qc303_maxspeed qc305_validlocation qc306_uerr qc307_verr";
    Float64 colorBarMaximum 10.0;
    Float64 colorBarMinimum 0.0;
    String comment 
"QCPrimaryFlagDefinition: Highest flag value of qc303, qc305, qc306, qc307
This flag will be set to not_evaluated only if ALL individual tests were not_evaluated.";
    String flag_meanings "pass not_evaluated suspect fail missing_data";
    Byte flag_values 1, 2, 3, 4, 9;
    String ioos_category "Quality";
    String long_name "Primary Flag";
    String short_name "primaryflag";
    String standard_name "surface_eastward_sea_water_velocity status_flag";
    String units "1";
    Byte valid_max 9;
    Byte valid_min 1;
  }
  qc_operator_flag {
    Byte _FillValue 25;
    String _Unsigned "false";
    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_flag follows QCFlagDefinitions and is set at discretion of the operator or data manager.";
    String flag_meanings "pass not_evaluated suspect fail missing_data";
    Byte flag_values 1, 2, 3, 4, 9;
    String ioos_category "Quality";
    String long_name "Operator Flag";
    String short_name "opflag";
    String standard_name "surface_eastward_sea_water_velocity status_flag";
    String units "1";
    Byte valid_max 9;
    Byte valid_min 1;
  }
  NC_GLOBAL {
    String acknowledgement "This data is provided by the Mid-Atlantic Regional Association Coastal Ocean Observing System (MARACOOS). Funding is provided by the U.S. Integration Ocean Observing System (IOOS).";
    String cdm_data_type "Grid";
    String comment "Network maintained by MARACOOS and SECOORA. For oi_* global attribute explanations, see references attribute";
    String contributor_name "Scott Glenn, Josh Kohut, Hugh Roarty, Ethan Handel, Michael Smith, Laura Nazzaro, Teresa Updyke, Harvey Seim, Michael Muglia, Patterson Taylor, Spencer Wilkinson, Anthony Whipple";
    String contributor_role "Principal Investigator, Principal Investigator, Principal Investigator, Hardware Maintenance, Data Manager, Data Manager, Principal Investigator, Principal Investigator, Principal Investigator, Hardware Maintenance, Hardware Maintenance, Hardware Maintenance";
    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 "2023-04-03T17:54:22Z";
    String date_issued "2023-04-03T17:54:22Z";
    String date_metadata_modified "2023-04-03T17:54:22Z";
    String date_modified "2023-04-03T17:54:22Z";
    Float64 Easternmost_Easting -66.58131;
    Float64 geospatial_lat_max 43.85136;
    Float64 geospatial_lat_min 33.81852;
    Float64 geospatial_lat_resolution 0.05394;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -66.58131;
    Float64 geospatial_lon_min -77.90598;
    Float64 geospatial_lon_resolution 0.058075230769230754;
    String geospatial_lon_units "degrees_east";
    String grid_mapping_comment "http://www.opengis.net/def/crs/EPSG/0/4326";
    String grid_mapping_epsg_code "EPSG:4326";
    Float64 grid_mapping_inverse_flattening 298.257223563;
    String grid_mapping_long_name "Coordinate Reference System";
    String grid_mapping_name "latitude_longitude";
    String grid_mapping_semi_major_axis "6378137.0";
    String history 
"Hourly CODAR radial data combined into one hourly file containing vectors.
2024-12-21T12:40:24Z (local files)
2024-12-21T12:40:24Z http://hfr.marine.rutgers.edu/erddap/griddap/realtime_maracoos_6km_totals_qartod.das";
    String infoUrl "rucool.marine.rutgers.edu";
    String institution "Center for Ocean Observing and Leadership, Department of Marine & Coastal Sciences, Rutgers University";
    String instrument "Network includes CODAR sites AMAG, ASSA, BLCK, BRIG, CEDR, CORE, DUCK, HATY, HEMP, HOOK, LISL, LOVE, MRCH, MVCO, OCRA, NANT, NAUS, and WILD";
    String keywords "/sqrt, 6km, advisories, associated, association, atlantic, calculate, center, circulation, coastal, component, current, currents, data, 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, err^2, error, flag, forecast, hat, hat-, information, leadership, mapping, maracoos, marine, maximum, measurements, mid, mid-atlantic, normalized, northward, number, number_of_radials, observing, ocean, oceans, operator, primary, processes, qc303_maxspeed, qc305_validlocation, qc306_uerr, qc307_verr, qc_operator_flag, qc_primary_flag, quality, radar, radial, regional, rutgers, science, sciences, sea, seawater, spectral, spectral/engineering, speed, sqrt, statistics, status, surface, surface_eastward_sea_water_velocity, surface_eastward_sea_water_velocity status_flag, surface_northward_sea_water_velocity, surface_northward_sea_water_velocity status_flag, system, test, tides, time, total_errors, totals, u, u^2, u_err, uerr, uncertainty, university, used, uv_covariance, v, v^2, v_err, valid, value, velocity, verr, verr^2, 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 MARACOOS_processing_version "maracoos_v02";
    String method "Optimal Interpolation";
    String naming_authority "edu.rutgers.marine.rucool";
    Float64 Northernmost_Northing 43.85136;
    String platform "MARACOOS HF Radar 5MHz Network";
    String processing_level "Level 3";
    String project "Mid-Atlantic Regional Association Coastal Ocean Observing System - 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 "DOI:10.1029/2007JC004244 DOI:10.1007/s10236-012-0533-9 https://maracoos.org/ https://rucool.marine.rutgers.edu/facilities https://rucool.marine.rutgers.edu/data";
    String sea_name "Mid-Atlantic Bight";
    String source "CODAR SeaSonde Surface Current Mapping Device";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 33.81852;
    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 testOutOfDate "now-68days";
    String time_coverage_end "2024-12-21T09:00:00Z";
    String time_coverage_start "2023-03-16T00:00:00Z";
    String title "Surface Currents - MARACOOS - 6km - Realtime, QARTOD QC";
    Float64 Westernmost_Easting -77.90598;
  }
}

 

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.


 
ERDDAP, Version 2.25_1
Disclaimers | Privacy Policy | Contact