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Dataset Title:  Radials for PTC1 Subscribe RSS
Institution:  SLO   (Dataset ID: SLO_PTC1)
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) ?          2025-06-03T16:00:00Z    2025-09-18T18:00:00Z
  < slider >
 flag ?      
   - +  ?
 station ?          "PTC1"    "PTC1"
 antenna_lat (antenna_latitude, degrees_north) ?          34.4486667    34.4486667
 antenna_lon (antenna_longitude, degrees_east) ?          -120.47165    -120.47165
 institution (instiution) ?          "SLO"    "SLO"
 longitude (degrees_east) ?          -121.5069303    -119.4363697
  < slider >
 latitude (degrees_north) ?          33.5909599    35.306253
  < slider >
 VELU (cm/s) ?          -171.579    169.829
 VELV (cm/s) ?          -179.884    175.136
 VFLG (vector_flag_masks) ?          0    128
 ESPC (cm/s) ?          0.0    157.073
 ETMP (cm/s) ?          0.0    177.742
 EDTP (distance_to_pattern) ?          -8.0    8.0
 EASN (signal_to_noise_ratio, dB) ?          6.0    63.4
 MAXV (cm/s) ?          -179.911    179.911
 MINV (cm/s) ?          -179.911    173.577
 ERSC ?          1    116
 ERTC ?          2    7
 XDST (km) ?          -95.1392    95.1392
 YDST (km) ?          -95.1392    95.1392
 RNGE (range_away_from_instrument, km) ?          1.5101    95.1392
 BEAR (degrees) ?          0.0    359.0
 VELO (velocity, cm/s) ?          -179.911    175.573
 HEAD (direction, degrees) ?          0.0    359.0
 SPRC ?          1    63
 
Server-side Functions ?
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The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.7489664e+9, 1.7582184e+9;
    String axis "T";
    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 ioos_category "Unknown";
    String long_name "flag indicating type of processing used";
  }
  station {
    String ioos_category "Unknown";
    String long_name "station";
  }
  antenna_lat {
    Float64 actual_range 34.4486667, 34.4486667;
    String ioos_category "Location";
    String long_name "antenna_latitude";
    String standard_name "latitude";
    String units "degrees_north";
  }
  antenna_lon {
    Float64 actual_range -120.47165, -120.47165;
    String ioos_category "Location";
    String long_name "antenna_longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  institution {
    String ioos_category "Unknown";
    String long_name "instiution";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float64 actual_range -121.5069303, -119.4363697;
    String axis "X";
    Float64 colorBarMaximum 180.0;
    Float64 colorBarMinimum -180.0;
    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 33.5909599, 35.306253;
    String axis "Y";
    Float64 colorBarMaximum 90.0;
    Float64 colorBarMinimum -90.0;
    String ioos_category "Location";
    String long_name "Latitude";
    String source_name "LATD";
    String standard_name "latitude";
    String units "degrees_north";
  }
  VELU {
    Float32 actual_range -171.579, 169.829;
    String ioos_category "Currents";
    String long_name "current vector velocity eastern component";
    String standard_name "surface_eastward_sea_water_velocity";
    String units "cm/s";
  }
  VELV {
    Float32 actual_range -179.884, 175.136;
    String ioos_category "Currents";
    String long_name "current vector velocity northern component";
    String standard_name "surface_northward_sea_water_velocity";
    String units "cm/s";
  }
  VFLG {
    Int16 actual_range 0, 128;
    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, 157.073;
    String ioos_category "Unknown";
    String long_name "radial_sea_water_velocity_spatial_quality";
    String units "cm/s";
  }
  ETMP {
    Float32 _FillValue 999.0;
    Float32 actual_range 0.0, 177.742;
    String ioos_category "Unknown";
    String long_name "radial_sea_water_velocity_temporal_quality";
    String units "cm/s";
  }
  EDTP {
    Float32 _FillValue 999.0;
    Float32 actual_range -8.0, 8.0;
    String ioos_category "Unknown";
    String long_name "distance_to_pattern";
  }
  EASN {
    Float32 _FillValue 999.0;
    Float32 actual_range 6.0, 63.4;
    String ioos_category "Unknown";
    String long_name "signal_to_noise_ratio";
    String units "dB";
  }
  MAXV {
    Float32 actual_range -179.911, 179.911;
    String ioos_category "Unknown";
    String long_name "radial_sea_water_velocity_away_from_instrument_maximum\"";
    String units "cm/s";
  }
  MINV {
    Float32 actual_range -179.911, 173.577;
    String ioos_category "Unknown";
    String long_name "radial_sea_water_velocity_away_from_instrument_minimum";
    String units "cm/s";
  }
  ERSC {
    String _Unsigned "false";
    Byte actual_range 1, 116;
    String ioos_category "Unknown";
    String long_name "radial_sea_water_velocity_spatial_quality_count";
  }
  ERTC {
    String _Unsigned "false";
    Byte actual_range 2, 7;
    String ioos_category "Unknown";
    String long_name "radial_sea_water_velocity_temporal_quality_count";
  }
  XDST {
    Float32 actual_range -95.1392, 95.1392;
    String ioos_category "Unknown";
    String long_name "eastward_distance_from_instrument";
    String units "km";
  }
  YDST {
    Float32 actual_range -95.1392, 95.1392;
    String ioos_category "Unknown";
    String long_name "northward_distance_from_instrument";
    String units "km";
  }
  RNGE {
    Float32 actual_range 1.5101, 95.1392;
    String ioos_category "Unknown";
    String long_name "range_away_from_instrument";
    String units "km";
  }
  BEAR {
    Float32 actual_range 0.0, 359.0;
    String ioos_category "Unknown";
    String long_name "bearing_away_from_instrument";
    String units "degrees";
  }
  VELO {
    Float32 actual_range -179.911, 175.573;
    String ioos_category "Currents";
    String long_name "velocity";
    String standard_name "sea_water_velocity";
    String units "cm/s";
  }
  HEAD {
    Float32 actual_range 0.0, 359.0;
    String ioos_category "Unknown";
    String long_name "direction";
    String standard_name "sea_water_velocity_to_direction";
    String units "degrees";
  }
  SPRC {
    String _Unsigned "false";
    Byte actual_range 1, 63;
    String ioos_category "Unknown";
    String long_name "radial_sea_water_velocity_cross_spectal_range_cell";
  }
 }
  NC_GLOBAL {
    String cdm_data_type "Other";
    String Conventions "COARDS, CF-1.6, ACDD-1.3";
    Float64 Easternmost_Easting -119.4363697;
    Float64 geospatial_lat_max 35.306253;
    Float64 geospatial_lat_min 33.5909599;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -119.4363697;
    Float64 geospatial_lon_min -121.5069303;
    String geospatial_lon_units "degrees_east";
    String history 
"2025-09-18T19:23:47Z (local files)
2025-09-18T19:23:47Z https://hfradar.ioos.us/erddap/tabledap/SLO_PTC1.html";
    String infoUrl "???";
    String institution "SLO";
    String keywords "bear, currents, data, ersc, ertc, espc, etmp, head, 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 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.";
    Float64 Northernmost_Northing 35.306253;
    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 33.5909599;
    String standard_name_vocabulary "CF Standard Name Table v55";
    String subsetVariables "flag";
    String summary "Radials. Data from a local source.";
    String time_coverage_end "2025-09-18T18:00:00Z";
    String time_coverage_start "2025-06-03T16:00:00Z";
    String title "Radials for PTC1";
    Float64 Westernmost_Easting -121.5069303;
  }
}

 

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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.

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For example,
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