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Dataset Title:	G507 Slocum Glider Dataset (March 2024)
Institution:	The University of Alaska Fairbanks College of Fisheries and Ocean Sciences (Dataset ID: unit_507_20240304T0001)
Range:	longitude = -148.49149 to -148.11418°E, latitude = 58.44946 to 58.79015°N, depth = 7.2614827 to 849.62415m, time = 2024-04-01T01:22:41Z to 2024-04-02T22:43:12Z
Information:	Summary \| License \| FGDC \| ISO 19115 \| Metadata \| Background \| Subset \| Data Access Form \| Files

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The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  temperature {
    Float64 _FillValue -9999.9;
    String accuracy "n/a";
    Float64 actual_range 3.2857000827789307, 5.852799892425537;
    Float64 colorBarMaximum 6.0;
    Float64 colorBarMinimum 4.0;
    String colorBarPalette "KT_thermal";
    String instrument "instrument_ctd";
    String ioos_category "Temperature";
    String long_name "Sea Water Temperature";
    String observation_type "measured";
    String platform "platform";
    String precision "n/a";
    String resolution "n/a";
    String standard_name "sea_water_temperature";
    String units "degree_Celsius";
    Float64 valid_max 40.0;
    Float64 valid_min -5.0;
  }
  salinity {
    Float64 _FillValue -9999.9;
    String accuracy "n/a";
    Float64 actual_range 32.21750813378453, 34.28312426809079;
    Float64 colorBarMaximum 34.0;
    Float64 colorBarMinimum 31.0;
    String colorBarPalette "KT_thermal";
    String instrument "instrument_ctd";
    String ioos_category "Salinity";
    String long_name "Sea Water Practical Salinity";
    String observation_type "calculated";
    String platform "platform";
    String precision "n/a";
    String resolution "n/a";
    String standard_name "sea_water_practical_salinity";
    String units "1e-3";
    Float64 valid_max 40.0;
    Float64 valid_min 0.0;
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float64 _FillValue NaN;
    Float64 actual_range 58.44945758697209, 58.79014787179487;
    String axis "Y";
    Float64 colorBarMaximum 90.0;
    Float64 colorBarMinimum -90.0;
    String comment "Interpolated latitude at each point in the time-series";
    String coordinate_reference_frame "urn:ogc:crs:EPSG::4326";
    String ioos_category "Location";
    String long_name "Precise Latitude";
    String observation_type "measured";
    String platform "platform";
    String reference "WGS84";
    String source_name "lat";
    String standard_name "latitude";
    String units "degrees_north";
    Float64 valid_max 90.0;
    Float64 valid_min -90.0;
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float64 _FillValue NaN;
    Float64 actual_range -148.491482, -148.11418685898354;
    String axis "X";
    Float64 colorBarMaximum 180.0;
    Float64 colorBarMinimum -180.0;
    String comment "Interpolated longitude at each point in the time-series.";
    String coordinate_reference_frame "urn:ogc:crs:EPSG::4326";
    String ioos_category "Location";
    String long_name "Precise Longitude";
    String observation_type "measured";
    String platform "platform";
    String reference "WGS84";
    String source_name "lon";
    String standard_name "longitude";
    String units "degrees_east";
    Float64 valid_max 180.0;
    Float64 valid_min -180.0;
  }
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.711934561521027e+9, 1.712097792107544e+9;
    String axis "T";
    String calendar "gregorian";
    String comment "Measured or calculated time at each point in the time-series";
    String coordinates "time depth lon lat";
    String ioos_category "Time";
    String long_name "Time";
    String observation_type "measured";
    String source_name "time";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  echogram_time {
    Float64 actual_range 1.7119364565468748e+9, 1.712097792107544e+9;
    String calendar "gregorian";
    String ioos_category "Time";
    String long_name "Time";
    String observation_type "measured";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  echogram_depth {
    Float64 _FillValue NaN;
    Float64 actual_range 0.002002716064453125, 850.6600341796875;
    String axis "Z";
    Float64 colorBarMaximum 2000.0;
    Float64 colorBarMinimum 0.0;
    String colorBarPalette "OceanDepth";
    String comment "Native glider sensor name";
    String instrument "instrument_altimeter";
    String ioos_category "Location";
    String long_name "Depth";
    String observation_type "calculated";
    String platform "platform";
    String positive "down";
    String reference_datum "sea-surface";
    String source_name "echogram_depth";
    String standard_name "depth";
    String units "m";
    Float64 valid_max 2000.0;
    Float64 valid_min 0.0;
  }
  depth {
    String _CoordinateAxisType "Height";
    String _CoordinateZisPositive "down";
    Float64 _FillValue NaN;
    Float64 actual_range 7.26148260051636, 849.6241467899579;
    String axis "Z";
    Float64 colorBarMaximum 2000.0;
    Float64 colorBarMinimum 0.0;
    String colorBarPalette "OceanDepth";
    String comment "Native glider sensor name";
    String instrument "instrument_altimeter";
    String ioos_category "Location";
    String long_name "Depth";
    String observation_type "calculated";
    String platform "platform";
    String positive "down";
    String reference_datum "sea-surface";
    String source_name "depth";
    String standard_name "depth";
    String units "m";
    Float64 valid_max 2000.0;
    Float64 valid_min 0.0;
  }
  echogram_sv {
    Float64 _FillValue NaN;
    Float64 actual_range -73.0, -31.0;
    Float64 colorBarMaximum -30.0;
    Float64 colorBarMinimum -80.0;
    String colorBarPalette "EK80";
    String comment "dimensionless units (dB re 1 m-1)";
    String ioos_category "Other";
    String long_name "Volume backscattering strength";
    String observation_type "measured";
    String platform "platform";
    String standard_name "acoustic_volume_backscattering_strength_in_sea_water";
    String units "1";
  }
  echogram_lat {
    Float64 _FillValue NaN;
    Float64 actual_range 58.44945758697209, 58.786185962564204;
    String axis "Y";
    Float64 colorBarMaximum 90.0;
    Float64 colorBarMinimum -90.0;
    String comment "Interpolated latitude at each point in the time-series";
    String coordinate_reference_frame "urn:ogc:crs:EPSG::4326";
    String ioos_category "Location";
    String long_name "Precise Latitude";
    String observation_type "measured";
    String platform "platform";
    String references "WGS84";
    String standard_name "latitude";
    String units "degrees_north";
    Float64 valid_max 90.0;
    Float64 valid_min -90.0;
  }
  echogram_lon {
    Float64 _FillValue NaN;
    Float64 actual_range -148.488048707823, -148.11418685898354;
    String axis "X";
    Float64 colorBarMaximum 180.0;
    Float64 colorBarMinimum -180.0;
    String comment "Interpolated longitude at each point in the time-series.";
    String coordinate_reference_frame "urn:ogc:crs:EPSG::4326";
    String ioos_category "Location";
    String long_name "Precise Longitude";
    String observation_type "measured";
    String platform "platform";
    String references "WGS84";
    String standard_name "longitude";
    String units "degrees_east";
    Float64 valid_max 180.0;
    Float64 valid_min -180.0;
  }
  profile_id {
    Int32 _FillValue -999;
    Int32 actual_range 1711934561, 1712092237;
    String cf_role "profile_id";
    Float64 colorBarMaximum 2.5e+9;
    Float64 colorBarMinimum 0.0;
    String comment "Sequential profile number within the trajectory.  This value is unique in each file that is part of a single trajectory/deployment.";
    String ioos_category "Identifier";
    String long_name "Profile ID";
    Int32 valid_max 2147483647;
    Int32 valid_min 0;
  }
  profile_lat {
    Float64 _FillValue -9999.9;
    Float64 actual_range 58.45971092984968, 58.7893970668119;
    Float64 colorBarMaximum 90.0;
    Float64 colorBarMinimum -90.0;
    String comment "Value is interpolated to provide an estimate of the latitude at the mid-point of the profile";
    String ioos_category "Location";
    String long_name "Profile Latitude";
    String observation_type "calculated";
    String platform "platform";
    String standard_name "latitude";
    String units "degrees_north";
    Float64 valid_max 90.0;
    Float64 valid_min -90.0;
  }
  profile_lon {
    Float64 _FillValue -9999.9;
    Float64 actual_range -148.49099523396276, -148.12757930221903;
    Float64 colorBarMaximum 180.0;
    Float64 colorBarMinimum -180.0;
    String comment "Value is interpolated to provide an estimate of the longitude at the mid-point of the profile";
    String ioos_category "Location";
    String long_name "Profile Longitude";
    String observation_type "calculated";
    String platform "platform";
    String standard_name "longitude";
    String units "degrees_east";
    Float64 valid_max 180.0;
    Float64 valid_min -180.0;
  }
  acoustic_time {
    Float64 actual_range 1.711937266e+9, 1.712095111e+9;
    String calendar "gregorian";
    String ioos_category "Time";
    String long_name "Acoustic Time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  profile_time {
    Float64 actual_range 1.711934731143259e+9, 1.712092283e+9;
    String calendar "gregorian";
    String comment "Timestamp corresponding to the mid-point of the profile";
    String ioos_category "Time";
    String long_name "Profile Time";
    String observation_type "calculated";
    String platform "platform";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  u {
    Float64 _FillValue -9999.9;
    Float64 actual_range -0.16321973502635956, 0.012764363549649715;
    Float64 colorBarMaximum 0.5;
    Float64 colorBarMinimum -0.5;
    String comment "The depth-averaged current is an estimate of the net current measured while the glider is underwater.  The value is calculated over the entire underwater segment, which may consist of 1 or more dives.";
    String ioos_category "Currents";
    String long_name "Depth-Averaged Eastward Sea Water Velocity";
    String observation_type "calculated";
    String platform "platform";
    String standard_name "eastward_sea_water_velocity";
    String units "m.s-1";
    Float64 valid_max 10.0;
    Float64 valid_min -10.0;
  }
  v {
    Float64 _FillValue -9999.9;
    Float64 actual_range -0.28775471448898315, -0.050652652978897095;
    Float64 colorBarMaximum 0.5;
    Float64 colorBarMinimum -0.5;
    String comment "The depth-averaged current is an estimate of the net current measured while the glider is underwater.  The value is calculated over the entire underwater segment, which may consist of 1 or more dives.";
    String ioos_category "Currents";
    String long_name "Depth-Averaged Northward Sea Water Velocity";
    String observation_type "calculated";
    String platform "platform";
    String standard_name "northward_sea_water_velocity";
    String units "m.s-1";
    Float64 valid_max 10.0;
    Float64 valid_min -10.0;
  }
  platform {
    Int32 _FillValue -999;
    String comment "Teledyne Webb Research Slocum G2 Glider";
    Float64 id 4802989;
    String instrument "instrument_ctd,instrument_acoustics";
    String ioos_category "Identifier";
    String long_name "G507 Slocum Glider";
    String type "platform";
    Float64 wmo_id 4802989;
  }
  instrument_ctd {
    Int32 _FillValue 0;
    String calibration_date "2017";
    Float64 colorBarMaximum 40.0;
    Float64 colorBarMinimum 30.0;
    String comment "Slocum Glider UAF G507 -- pumped CTD";
    String factory_calibrated "y";
    String ioos_category "Salinity";
    String long_name "Seabird WEBB pumped glider conductivity, temperature, depth sensor";
    String make_model "Seabird Slocum Glider Payload CTD";
    String platform "platform";
    String serial_number "712-9221";
    String standard_name "sea_water_electrical_conductivity";
    String type "instrument";
  }
  trajectory {
    String cf_role "trajectory_id";
    String comment "A trajectory is a single deployment of a glider and may span multiple data files.";
    String ioos_category "Identifier";
    String long_name "Trajectory/Deployment Name";
  }
  sv_avg {
    Float64 _FillValue NaN;
    Float64 actual_range -45.00735444653277, -36.499209876737574;
    String ioos_category "Statistics";
    String long_name "Mean volume backscattering strength";
    String observation_type "calculated";
    String standard_name "acoustic_volume_backscattering_strength_in_sea_water";
    String units "m";
  }
  depth_integral {
    Float64 _FillValue NaN;
    Float64 actual_range -27.764595750524883, -22.97352041667409;
    Float64 colorBarMaximum 8000.0;
    Float64 colorBarMinimum -8000.0;
    String colorBarPalette "TopographyDepth";
    String ioos_category "Location";
    String long_name "Depth integral";
    String observation_type "calculated";
    String standard_name "depth";
    String units "m";
  }
  center_of_mass {
    Float64 _FillValue NaN;
    Float64 actual_range 138.21311459207166, 800.66845295308;
    String ioos_category "Unknown";
    String long_name "Centre of mass";
    String observation_type "calculated";
    String standard_name "acoustic_centre_of_mass_in_sea_water";
    String units "m";
  }
  inertia {
    Float64 _FillValue NaN;
    Float64 actual_range 155.26478459942047, 63285.413595763974;
    String ioos_category "Unknown";
    String long_name "Inertia";
    String observation_type "calculated";
    String standard_name "acoustic_inertia_in_sea_water";
    String units "m-2";
  }
  equivalent_area {
    Float64 _FillValue NaN;
    Float64 actual_range 9.089914097772077, 17.839234582208622;
    String ioos_category "Unknown";
    String long_name "Equivalent area";
    String observation_type "calculated";
    String standard_name "acoustic_equivalent_area_in_sea_water";
    String units "m";
  }
  aggregation_index {
    Float64 _FillValue NaN;
    Float64 actual_range 0.056056216727892426, 0.11001204073480719;
    String ioos_category "Unknown";
    String long_name "Index of aggregation";
    String observation_type "calculated";
    String standard_name "acoustic_index_of_aggregation_in_sea_water";
    String units "m-1";
  }
  proportion_occupied {
    Float64 _FillValue NaN;
    Float64 actual_range 0.08695652173913043, 0.19451371571072318;
    String ioos_category "Unknown";
    String long_name "Proportion occupied";
    String observation_type "calculated";
    String standard_name "acoustic_proportion_occupied_in_sea_water";
    String units "1";
  }
  sci_sv_avg {
    UInt32 _ChunkSizes 304;
    Float64 _FillValue -9999.9;
    Float64 actual_range -88.21483612060547, -4.011721611022949;
    Float64 colorBarMaximum -30.0;
    Float64 colorBarMinimum -80.0;
    String colorBarPalette "EK80";
    String comment "dimensionless units (dB re 1 m-1)";
    String coordinates "time depth lon lat";
    String ioos_category "Other";
    String long_name "Mean volume-backscattering strength";
    String observation_type "calculated";
    String platform "platform";
    String standard_name "acoustic_volume_backscattering_strength_in_sea_water";
    String units "1";
  }
  sci_center_of_mass {
    UInt32 _ChunkSizes 304;
    Float64 _FillValue -9999.9;
    Float64 actual_range 2.715820074081421, 9.588377952575684;
    Float64 colorBarMaximum 50.0;
    Float64 colorBarMinimum 0.0;
    String coordinates "time depth lon lat";
    String ioos_category "Other";
    String long_name "Centre of mass";
    String observation_type "calculated";
    String platform "platform";
    String standard_name "acoustic_centre_of_mass_in_sea_water";
    String units "m";
  }
  sci_inertia {
    UInt32 _ChunkSizes 304;
    Float64 _FillValue -9999.9;
    Float64 actual_range 0.3235320746898651, 10.655272483825684;
    Float64 colorBarMaximum 500.0;
    Float64 colorBarMinimum 0.0;
    String coordinates "time depth lon lat";
    String ioos_category "Other";
    String long_name "Inertia";
    String observation_type "calculated";
    String platform "platform";
    String standard_name "acoustic_inertia_in_sea_water";
    String units "m-2";
  }
  sci_equivalent_area {
    UInt32 _ChunkSizes 304;
    Float64 _FillValue -9999.9;
    Float64 actual_range 3.1063382625579834, 9.906310081481934;
    Float64 colorBarMaximum 50.0;
    Float64 colorBarMinimum 0.0;
    String coordinates "time depth lon lat";
    String ioos_category "Other";
    String long_name "Equivalent area";
    String observation_type "calculated";
    String platform "platform";
    String standard_name "acoustic_equivalent_area_in_sea_water";
    String units "m";
  }
  sci_aggregation_index {
    UInt32 _ChunkSizes 304;
    Float64 _FillValue -9999.9;
    Float64 actual_range 0.10284804552793503, 0.3251647651195526;
    Float64 colorBarMaximum 1.0;
    Float64 colorBarMinimum 0.0;
    String coordinates "time depth lon lat";
    String ioos_category "Other";
    String long_name "Index of aggregation";
    String observation_type "calculated";
    String platform "platform";
    String standard_name "acoustic_index_of_aggregation_in_sea_water";
    String units "m-1";
  }
  sci_proportion_occupied {
    UInt32 _ChunkSizes 304;
    Float64 _FillValue -9999.9;
    Float64 actual_range 0.17833708226680756, 0.20000456273555756;
    Float64 colorBarMaximum 1.0;
    Float64 colorBarMinimum 0.0;
    String comment "dimensionless units";
    String coordinates "time depth lon lat";
    String ioos_category "Other";
    String long_name "Proportion occupied";
    String observation_type "calculated";
    String platform "platform";
    String standard_name "acoustic_proportion_occupied_in_sea_water";
    String units "1";
  }
 }
  NC_GLOBAL {
    String acknowledgement "This work was supported by funding from NOAA/IOOS/AOOS.";
    String cdm_data_type "TrajectoryProfile";
    String cdm_profile_variables "profile_id";
    String cdm_trajectory_variables "trajectory";
    String comment "UAF G507 Glider deployment in the North Pacific Ocean (March 2024)";
    String contributor_email "sldanielson@alaska.edu";
    String contributor_name "Seth Danielson";
    String contributor_role "Principal Investigator";
    String contributor_url "https://www.uaf.edu/cfos/people/faculty/detail/seth-danielson.php";
    String Conventions "CF-1.10, COARDS, ACDD-1.3";
    String creator_email "hank.stats@alaska.edu";
    String creator_name "Hank Statscewich";
    String creator_type "person";
    String creator_url "https://uaf.edu/cfos/people/research-staff-and-post-docs/detail/hank-statscewich.php";
    String date_created "2024-04-04T05:25:45Z";
    String date_issued "2024-04-04T05:25:45Z";
    String date_modified "2024-04-04T05:25:45Z";
    Float64 Easternmost_Easting -148.11418685898354;
    String featureType "TrajectoryProfile";
    String format_version "IOOS_Glider_NetCDF_v2.0.nc";
    String geospatial_bounds "POLYGON ((58.459800 -148.127690, 58.459800 -148.127450, 58.459620 -148.127450, 58.459620 -148.127690, 58.459800 -148.127690))";
    Float64 geospatial_lat_max 58.79014787179487;
    Float64 geospatial_lat_min 58.44945758697209;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -148.11418685898354;
    Float64 geospatial_lon_min -148.491482;
    String geospatial_lon_units "degrees_east";
    Float64 geospatial_vertical_max 849.6241467899579;
    Float64 geospatial_vertical_min 7.26148260051636;
    String geospatial_vertical_positive "down";
    String geospatial_vertical_units "m";
    String history 
"2024-04-04T05:25:45Z - Created with the GUTILS package: https://github.com/SECOORA/GUTILS
2024-11-25T01:32:39Z (local files)
2024-11-25T01:32:39Z https://acoustics.fish.washington.edu/tabledap/unit_507_20240304T0001.das";
    String id "unit_507-20240304T0000";
    String infoUrl "https://gliders.ioos.us/erddap/info/unit_507-20240304T0000/index.html";
    String institution "The University of Alaska Fairbanks College of Fisheries and Ocean Sciences";
    String ioos_regional_association "aoos";
    String keywords "acoustic, acoustic_time, acoustic_volume_backscattering_strength_in_sea_water, alaska, averaged, backscattering, circulation, college, conductivity, currents, data, dataset, density, deployment, depth, depth-averaged, earth, Earth Science > Oceans > Ocean Circulation > Ocean Currents, Earth Science > Oceans > Ocean Pressure > Water Pressure, Earth Science > Oceans > Ocean Temperature > Water Temperature, Earth Science > Oceans > Salinity/Density > Conductivity, Earth Science > Oceans > Salinity/Density > Density, Earth Science > Oceans > Salinity/Density > Salinity, eastward, eastward_sea_water_velocity, echogram_lat, echogram_lon, echogram_sv, echogram_time, electrical, fairbanks, fisheries, g507, glider, identifier, instrument_ctd, latitude, longitude, name, northward, northward_sea_water_velocity, ocean, oceans, platform, precise, pressure, profile, profile_id, profile_lat, profile_lon, profile_time, pumped, salinity, salinity/density, science, sciences, sea, sea_water_electrical_conductivity, seabird, seawater, sensor, slocum, strength, temperature, time, trajectory, trajectory/deployment, u, university, v, velocity, volume, water, webb";
    String keywords_vocabulary "GCMD Science Keywords";
    String license "This data may be redistributed and used without restriction.";
    String metadata_link "https://gliders.ioos.us/erddap/info/unit_507-20240304T0000/index.html";
    String naming_authority "edu.alaska";
    Float64 Northernmost_Northing 58.79014787179487;
    String platform_tags "portal:25,axds:portal:25:tag:Gliders,axds:dashboard:glider:EcoMetrics Dashboard";
    String platform_type "Slocum Glider";
    String processing_level "Dataset taken from glider native file format and is provided as is with no expressed or implied assurance of quality assurance or quality control.";
    String project "AOOS Gliders in Support of Fisheries Management";
    String publisher_email "dmac@aoos.org";
    String publisher_name "AOOS Glider Observatory";
    String publisher_type "institution";
    String publisher_url "https://aoos.org";
    String references "https://www.uaf.edu/cfos/";
    String sea_name "North Pacific Ocean";
    String source "Observational data from a profiling glider";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 58.44945758697209;
    String standard_name_vocabulary "CF Standard Name Table v70";
    String subsetVariables "acoustic_time, latitude, longitude, time, profile_id, profile_lat, profile_lon, profile_time, u, v, platform, instrument_ctd, trajectory";
    String summary "UAF G507 Glider deployment in the North Pacific Ocean (March 2024)";
    String support_email "dmac@aoos.org,ioos.glider.data@noaa.gov,ioos.glider.data@noaa.gov";
    String support_name "aoos,ioos,noaa";
    String support_role "fiscal,fiscal,fiscal";
    String support_type "ra,federal,federal";
    String time_coverage_duration "P0DT0H1M37.367737088S";
    String time_coverage_end "2024-04-02T22:43:12Z";
    String time_coverage_start "2024-04-01T01:22:41Z";
    String title "G507 Slocum Glider Dataset (March 2024)";
    Float64 Westernmost_Easting -148.491482;
    Float64 wmo_id 4802989;
  }
}

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.

(easy) You can get data by using the dataset's Data Access Form or Subset form. They make 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.

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.