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Dataset Title:  Radials for SBAY   RSS
Institution:  UPR   (Dataset ID: UPR_SBAY)
Information:  Summary ? | License ? | FGDC | ISO 19115 | Metadata | Background (external link) | Subset | Make a graph
 
Variable ?   Optional
Constraint #1 ?
Optional
Constraint #2 ?
   Minimum ?
   or a List of Values ?
   Maximum ?
 
 time (UTC) ?          2025-02-16T22:00:00Z    2025-02-16T22:00:00Z
  < slider >
 flag ?      
   - +  ?
 station ?              
 antenna_lat (degrees_north) ?          18.4750667    18.4750667
 antenna_lon (degrees_east) ?          -66.1397833    -66.1397833
 institution ?              
 longitude (degrees_east) ?          -67.0443138    -65.2247631
  < slider >
 latitude (degrees_north) ?          18.416033    19.3480787
  < slider >
 VELU (cm/s) ?          -46.023    12.164
 VELV (cm/s) ?          -21.133    34.236
 VFLG (vector_flag_masks) ?          0    128
 ESPC (cm/s) ?          0.0    18.003
 ETMP (cm/s) ?          0.0    48.158
 EDTP ?          -7.5    7.9
 EASN (signal_to_noise_ratio, dB) ?          7.0    47.5
 MAXV (cm/s) ?          -29.151    75.328
 MINV (cm/s) ?          -50.917    29.151
 ERSC ?          1    42
 ERTC ?          2    7
 XDST (km) ?          -95.4595    96.6347
 YDST (km) ?          -6.3206    96.6347
 RNGE (distance_from_instrument, km) ?          6.0406    96.6494
 BEAR (degrees_true) ?          4.0    359.0
 VELO (speed, cm/s) ?          -38.946    49.208
 HEAD (direction, degrees_true) ?          84.0    284.0
 SPRC ?          2    32
 
Server-side Functions ?
 distinct() ?
? ("Hover here to see a list of options. Click on an option to select it.Hover here to see a list of options. Click on an option to select it.Hover here to see a list of options. Click on an option to select it.Hover here to see a list of options. Click on an option to select it.Hover here to see a list of options. Click on an option to select it.")

File type: (more information)

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The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.7397432e+9, 1.7397432e+9;
    String axis "T";
    String coverage_content_type "coordinate";
    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";
  }
  flag {
    String coverage_content_type "qualityInformation";
    String ioos_category "Unknown";
    String long_name "flag indicating type of processing used";
  }
  station {
    String coverage_content_type "referenceInformation";
    String ioos_category "Identifier";
    String long_name "station";
  }
  antenna_lat {
    Float64 actual_range 18.4750667, 18.4750667;
    String coverage_content_type "coordinate";
    String ioos_category "Location";
    String long_name "latitude of origin of radial coordinate system";
    String standard_name "latitude";
    String units "degrees_north";
  }
  antenna_lon {
    Float64 actual_range -66.1397833, -66.1397833;
    String coverage_content_type "coordinate";
    String ioos_category "Location";
    String long_name "longitude of origin of radial coordinate system";
    String standard_name "longitude";
    String units "degrees_east";
  }
  institution {
    String coverage_content_type "referenceInformation";
    String ioos_category "Unknown";
    String long_name "institution";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float64 actual_range -67.0443138, -65.2247631;
    String axis "X";
    Float64 colorBarMaximum 180.0;
    Float64 colorBarMinimum -180.0;
    String coverage_content_type "coordinate";
    String ioos_category "Location";
    String long_name "Longitude";
    String source_name "LOND";
    String standard_name "longitude";
    String units "degrees_east";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float64 actual_range 18.416033, 19.3480787;
    String axis "Y";
    Float64 colorBarMaximum 90.0;
    Float64 colorBarMinimum -90.0;
    String coverage_content_type "coordinate";
    String ioos_category "Location";
    String long_name "Latitude";
    String source_name "LATD";
    String standard_name "latitude";
    String units "degrees_north";
  }
  VELU {
    Float32 actual_range -46.023, 12.164;
    String coverage_content_type "physicalMeasurement";
    String ioos_category "Currents";
    String long_name "current vector velocity eastern component";
    String platform "station";
    String units "cm/s";
  }
  VELV {
    Float32 actual_range -21.133, 34.236;
    String coverage_content_type "physicalMeasurement";
    String ioos_category "Currents";
    String long_name "radial_northward_sea_water_velocity_toward_instrument";
    String platform "station";
    String units "cm/s";
  }
  VFLG {
    Int16 actual_range 0, 128;
    String coverage_content_type "qualityInformation";
    String flag_masks "1s, 2s, 4s, 8s, 16s, 32s, 64s, 128s, 256s, 512s, 1024s";
    String flag_meanings "grid_point_deleted, grid_point_near_coast, point_measurement, no_radial_solution, baseline_interpolation, exceeds_max_speed, invalid_solution, solution_beyond_valid_spatial_domain, insufficient_angular_resolution, reserved, reserved";
    String ioos_category "Unknown";
    String long_name "vector_flag_masks";
  }
  ESPC {
    Float32 _FillValue 999.0;
    Float32 actual_range 0.0, 18.003;
    String coverage_content_type "qualityInformation";
    String ioos_category "Unknown";
    String long_name "spatial standard deviation of radial current velocity over the scatter patch";
    String units "cm/s";
  }
  ETMP {
    Float32 _FillValue 999.0;
    Float32 actual_range 0.0, 48.158;
    String coverage_content_type "qualityInformation";
    String ioos_category "Unknown";
    String long_name "temporal standard deviation of radial current velocity over coverage period";
    String units "cm/s";
  }
  EDTP {
    Float32 _FillValue 999.0;
    Float32 actual_range -7.5, 7.9;
    String coverage_content_type "qualityInformation";
    String ioos_category "Unknown";
    String long_name "distance to pattern (0 being it matches antenna pattern perfectly)";
  }
  EASN {
    Float32 _FillValue 999.0;
    Float32 actual_range 7.0, 47.5;
    String coverage_content_type "qualityInformation";
    String ioos_category "Unknown";
    String long_name "signal_to_noise_ratio";
    String units "dB";
  }
  MAXV {
    Float32 actual_range -29.151, 75.328;
    String coverage_content_type "physicalMeasurement";
    String ioos_category "Currents";
    String long_name "radial_sea_water_maximum_velocity_toward_instrument";
    String platform "station";
    String units "cm/s";
  }
  MINV {
    Float32 actual_range -50.917, 29.151;
    String coverage_content_type "physicalMeasurement";
    String ioos_category "Currents";
    String long_name "radial_sea_water_minimum_velocity_toward_instrument";
    String platform "station";
    String units "cm/s";
  }
  ERSC {
    String _Unsigned "false";
    Byte actual_range 1, 42;
    String coverage_content_type "qualityInformation";
    String ioos_category "Unknown";
    String long_name "number of radial velocities at the same range and bearing that went into the spatial value for radial velocity";
  }
  ERTC {
    String _Unsigned "false";
    Byte actual_range 2, 7;
    String coverage_content_type "qualityInformation";
    String ioos_category "Unknown";
    String long_name "number of radial velocities at the same range and bearing that went into the temporal value for radial velocity";
  }
  XDST {
    Float32 actual_range -95.4595, 96.6347;
    String coverage_content_type "coordinate";
    String ioos_category "Location";
    String long_name "eastward_distance_from_instrument";
    String units "km";
  }
  YDST {
    Float32 actual_range -6.3206, 96.6347;
    String coverage_content_type "coordinate";
    String ioos_category "Location";
    String long_name "northward_distance_from_instrument";
    String units "km";
  }
  RNGE {
    Float32 actual_range 6.0406, 96.6494;
    String coverage_content_type "coordinate";
    String ioos_category "Location";
    String long_name "distance_from_instrument";
    String units "km";
  }
  BEAR {
    Float32 actual_range 4.0, 359.0;
    String coverage_content_type "coordinate";
    String ioos_category "Location";
    String long_name "bearing from the origin to the radial current vector";
    String units "degrees_true";
  }
  VELO {
    Float32 actual_range -38.946, 49.208;
    String coverage_content_type "physicalMeasurement";
    String ioos_category "Currents";
    String long_name "speed";
    String platform "station";
    String standard_name "radial_sea_water_velocity_toward_instrument";
    String units "cm/s";
  }
  HEAD {
    Float32 actual_range 84.0, 284.0;
    String coverage_content_type "physicalMeasurement";
    String ioos_category "Currents";
    String long_name "direction";
    String platform "station";
    String standard_name "direction_of_radial_vector_toward_instrument";
    String units "degrees_true";
  }
  SPRC {
    String _Unsigned "false";
    Byte actual_range 2, 32;
    String coverage_content_type "coordinate";
    String ioos_category "Unknown";
    String long_name "cross spectra range cell the radials came from";
  }
 }
  NC_GLOBAL {
    String cdm_data_type "Grid";
    String Conventions "CF-1.12, ACDD-1.3, IOOS-1.2, NCCSV-1.2";
    String creator_country "United States of America";
    String creator_email "patricia.chardon@upr.edu";
    String creator_institution "University of Puerto Rico";
    String creator_name "Caribbean Coastal Ocean Observing System\"";
    String creator_sector "academic";
    String creator_type "institution";
    String creator_url "https://www.caricoos.org/hf-radar";
    Float64 Easternmost_Easting -65.2247631;
    Float64 geospatial_lat_max 19.3480787;
    Float64 geospatial_lat_min 18.416033;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -65.2247631;
    Float64 geospatial_lon_min -67.0443138;
    String geospatial_lon_units "degrees_east";
    String history 
"2025-10-08T03:50:46Z (local files)
2025-10-08T03:50:46Z http://dm3.caricoos.org/erddap/tabledap/UPR_SBAY.html";
    String id "UPR_SBAY";
    String infoUrl "https://hfradar.ioos.us/hfrnet/documents/HFRNet_Radial_NetCDF.pdf";
    String institution "UPR";
    String instrument "OCEAN SURFACE CURRENT RADAR";
    String instrument_vocabulary "https://gcmd.earthdata.nasa.gov/KeywordViewer/scheme/instruments?gtm_scheme=instruments";
    String keywords "bear, currents, data, ersc, ertc, espc, etmp, head, HF-radar, HFR, high frequency radar, identifier, latitude, longitude, maxv, minv, radials, rnge, sprc, time, time2, velo, velu, velv, vflg, xdst, ydst";
    String license "The data may be used and redistributed for free but are not intended for legal use, since they may contain inaccuracies.  Neither the data Contributor, IOOS, 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 naming_authority "gov.noaa.nos.ioos";
    Float64 Northernmost_Northing 19.3480787;
    String platform "surface_current_radar";
    String platform_name "Club de Pesca Rec Isla de Cabras, San Juan Bay (SBAY) HF-radar station";
    String platform_vocabulary "https://mmisw.org/ont/ioos/platform";
    String publisher_country "United States of America";
    String publisher_email "data.ioos@noaa.gov";
    String publisher_institution "NOAA IOOS Surface Currents Program";
    String publisher_name "NOAA IOOS Surface Currents Program";
    String publisher_type "institution";
    String publisher_url "https://ioos.noaa.gov/project/hf-radar/";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 18.416033;
    String standard_name_vocabulary "CF Standard Name Table v92";
    String subsetVariables "flag";
    String summary "High-frequency radar measurements of water velocity are radial in direction relative to the radar location and representative of the upper 0.3-2.5 meters of the water.";
    String time_coverage_end "2025-02-16T22:00:00Z";
    String time_coverage_start "2025-02-16T22:00:00Z";
    String title "Radials for SBAY";
    Float64 Westernmost_Easting -67.0443138;
  }
}

 

Using tabledap to Request Data and Graphs from Tabular Datasets

tabledap lets you request a data subset, a graph, or a map from a tabular dataset (for example, buoy data), via a specially formed URL. tabledap uses the OPeNDAP (external link) Data Access Protocol (DAP) (external link) and its selection 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.

Tabledap request URLs must be in the form
https://coastwatch.pfeg.noaa.gov/erddap/tabledap/datasetID.fileType{?query}
For example,
https://coastwatch.pfeg.noaa.gov/erddap/tabledap/pmelTaoDySst.htmlTable?longitude,latitude,time,station,wmo_platform_code,T_25&time>=2015-05-23T12:00:00Z&time<=2015-05-31T12:00:00Z
Thus, the query is often a comma-separated list of desired variable names, followed by a collection of constraints (e.g., variable<value), each preceded by '&' (which is interpreted as "AND").

For details, see the tabledap Documentation.


 
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