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Dataset Title:	CTD Profiles from RRS Challenger cruise CH54
Institution:	Plymouth Marine Laboratory (Dataset ID: 3365_CH54_CTD)
Range:	longitude = 2.16633 to 8.19983°E, latitude = 52.50967 to 55.4475°N, time = 1989-06-10T04:29:00Z to 1989-06-21T20:04:00Z
Information:	Summary \| License \| FGDC \| ISO 19115 \| Metadata \| Background \| Data Access Form \| Files

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The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  SDN_CRUISE {
    UInt32 _ChunkSizes 1, 80;
    String long_name "CRUISE NAME";
    String type "String";
  }
  crs {
    Int32 actual_range 0, 0;
    String epsg_code "EPSG:4326";
    String grid_mapping_name "latitude_longitude";
    String inverse_flattening "298.257223563";
    String semi_major_axis "6378137.0";
    String type "int";
  }
  SDN_EDMO_CODE {
    UInt32 _ChunkSizes 1;
    Int32 actual_range 43, 43;
    String long_name "European Directory of Marine Organisations code for the CDI partner";
    String type "int";
  }
  SDN_STATION {
    UInt32 _ChunkSizes 1, 80;
    String long_name "Profile label";
    String type "String";
  }
  SDN_LOCAL_CDI_ID {
    UInt32 _ChunkSizes 1, 80;
    String cf_role "profile_id";
    String long_name "SeaDataNet CDI identifier";
    String type "String";
  }
  sea_floor_depth_below_sea_surface {
    UInt32 _ChunkSizes 1;
    Float32 _FillValue -999.0;
    Float32 actual_range 14.0, 48.9;
    String long_name "Bathymetric depth at profile measurement site";
    String sdn_P02_name "Bathymetry and Elevation";
    String sdn_P02_urn "SDN:P02::MBAN";
    String sdn_parameter_name "Sea-floor depth (below instantaneous sea level) {bathymetric depth} in the water body";
    String sdn_parameter_urn "SDN:P01::MBANZZZZ";
    String sdn_uom_name "Metres";
    String sdn_uom_urn "SDN:P06::ULAA";
    String standard_name "sea_floor_depth_below_sea_surface";
    String type "float";
    String units "meters";
  }
  POSITION_SEADATANET_QC {
    UInt32 _ChunkSizes 1;
    Byte _FillValue 57;
    String _Unsigned "false";
    Byte actual_range 49, 49;
    String Conventions "SeaDataNet measurand qualifier flags";
    String coordinates "TIME PRES LATITUDE LONGITUDE";
    String flag_meanings "no_quality_control good_value probably_good_value probably_bad_value bad_value changed_value value_below_detection value_in_excess interpolated_value missing_value value_phenomenon_uncertain";
    String flag_values "[48 49 50 51 52 53 54 55 56 57 65]";
    String long_name "SeaDataNet quality flag";
    String sdn_conventions_urn "SDN:L20::";
    String type "byte";
  }
  TIME_SEADATANET_QC {
    UInt32 _ChunkSizes 1;
    Byte _FillValue 57;
    String _Unsigned "false";
    Byte actual_range 48, 48;
    String Conventions "SeaDataNet measurand qualifier flags";
    String coordinates "TIME";
    String flag_meanings "no_quality_control good_value probably_good_value probably_bad_value bad_value changed_value value_below_detection value_in_excess interpolated_value missing_value value_phenomenon_uncertain";
    String flag_values "[48 49 50 51 52 53 54 55 56 57 65]";
    String long_name "SeaDataNet quality flag";
    String sdn_conventions_urn "SDN:L20::";
    String type "byte";
  }
  PRES_SEADATANET_QC {
    UInt32 _ChunkSizes 1, 30;
    Byte _FillValue 57;
    String _Unsigned "false";
    Byte actual_range 49, 49;
    String Conventions "SeaDataNet measurand qualifier flags";
    String coordinates "TIME PRES LATITUDE LONGITUDE";
    String flag_meanings "no_quality_control good_value probably_good_value probably_bad_value bad_value changed_value value_below_detection value_in_excess interpolated_value missing_value value_phenomenon_uncertain";
    String flag_values "[48 49 50 51 52 53 54 55 56 57 65]";
    String long_name "SeaDataNet quality flag";
    String sdn_conventions_urn "SDN:L20::";
    String type "byte";
  }
  ATTNZR01_SEADATANET_QC {
    UInt32 _ChunkSizes 1, 30;
    Byte _FillValue 57;
    String _Unsigned "false";
    Byte actual_range 49, 49;
    String Conventions "SeaDataNet measurand qualifier flags";
    String coordinates "TIME PRES LATITUDE LONGITUDE";
    String flag_meanings "no_quality_control good_value probably_good_value probably_bad_value bad_value changed_value value_below_detection value_in_excess interpolated_value missing_value value_phenomenon_uncertain";
    String flag_values "[48 49 50 51 52 53 54 55 56 57 65]";
    String long_name "SeaDataNet quality flag";
    String sdn_conventions_urn "SDN:L20::";
    String type "byte";
  }
  ATTNZR01 {
    UInt32 _ChunkSizes 1, 30;
    Float32 _FillValue -1.0;
    Float32 actual_range 0.512, 3.254;
    String ancillary_variables "ATTNZR01_SEADATANET_QC";
    String coordinates "TIME PRES LATITUDE LONGITUDE";
    String long_name "Atten_red";
    String sdn_P02_name "Transmittance and attenuance of the water column";
    String sdn_P02_urn "SDN:P02::ATTN";
    String sdn_parameter_name "Attenuation (red light wavelength) per unit length of the water body by transmissometer";
    String sdn_parameter_urn "SDN:P01::ATTNZR01";
    String sdn_uom_name "per metre";
    String sdn_uom_urn "SDN:P06::UPRM";
    String type "float";
    String units "/m";
  }
  CPHLPR01_SEADATANET_QC {
    UInt32 _ChunkSizes 1, 30;
    Byte _FillValue 57;
    String _Unsigned "false";
    Byte actual_range 49, 49;
    String Conventions "SeaDataNet measurand qualifier flags";
    String coordinates "TIME PRES LATITUDE LONGITUDE";
    String flag_meanings "no_quality_control good_value probably_good_value probably_bad_value bad_value changed_value value_below_detection value_in_excess interpolated_value missing_value value_phenomenon_uncertain";
    String flag_values "[48 49 50 51 52 53 54 55 56 57 65]";
    String long_name "SeaDataNet quality flag";
    String sdn_conventions_urn "SDN:L20::";
    String type "byte";
  }
  CPHLPR01 {
    UInt32 _ChunkSizes 1, 30;
    Float32 _FillValue -1.0;
    Float32 actual_range 0.2, 23.0;
    String ancillary_variables "CPHLPR01_SEADATANET_QC";
    String coordinates "TIME PRES LATITUDE LONGITUDE";
    String long_name "chl-a_water_ISfluor";
    String sdn_P02_name "Chlorophyll pigment concentrations in water bodies";
    String sdn_P02_urn "SDN:P02::CPWC";
    String sdn_parameter_name "Concentration of chlorophyll-a {chl-a CAS 479-61-8} per unit volume of the water body [particulate >unknown phase] by in-situ chlorophyll fluorometer";
    String sdn_parameter_urn "SDN:P01::CPHLPR01";
    String sdn_uom_name "Milligrams per cubic metre";
    String sdn_uom_urn "SDN:P06::UMMC";
    String type "float";
    String units "mg/m^3";
  }
  DOXYPR01_SEADATANET_QC {
    UInt32 _ChunkSizes 1, 30;
    Byte _FillValue 57;
    String _Unsigned "false";
    Byte actual_range 49, 49;
    String Conventions "SeaDataNet measurand qualifier flags";
    String coordinates "TIME PRES LATITUDE LONGITUDE";
    String flag_meanings "no_quality_control good_value probably_good_value probably_bad_value bad_value changed_value value_below_detection value_in_excess interpolated_value missing_value value_phenomenon_uncertain";
    String flag_values "[48 49 50 51 52 53 54 55 56 57 65]";
    String long_name "SeaDataNet quality flag";
    String sdn_conventions_urn "SDN:L20::";
    String type "byte";
  }
  DOXYPR01 {
    UInt32 _ChunkSizes 1, 30;
    Float32 _FillValue -1.0;
    Float32 actual_range 219.8, 372.0;
    String ancillary_variables "DOXYPR01_SEADATANET_QC";
    String coordinates "TIME PRES LATITUDE LONGITUDE";
    String long_name "WC_dissO2_Beck";
    String sdn_P02_name "Dissolved oxygen parameters in the water column";
    String sdn_P02_urn "SDN:P02::DOXY";
    String sdn_parameter_name "Concentration of oxygen {O2 CAS 7782-44-7} per unit volume of the water body [dissolved plus reactive particulate phase] by in-situ Beckmann probe";
    String sdn_parameter_urn "SDN:P01::DOXYPR01";
    String sdn_uom_name "Micromoles per litre";
    String sdn_uom_urn "SDN:P06::UPOX";
    String type "float";
    String units "umol/l";
  }
  IRRDPP01_SEADATANET_QC {
    UInt32 _ChunkSizes 1, 30;
    Byte _FillValue 57;
    String _Unsigned "false";
    Byte actual_range 49, 49;
    String Conventions "SeaDataNet measurand qualifier flags";
    String coordinates "TIME PRES LATITUDE LONGITUDE";
    String flag_meanings "no_quality_control good_value probably_good_value probably_bad_value bad_value changed_value value_below_detection value_in_excess interpolated_value missing_value value_phenomenon_uncertain";
    String flag_values "[48 49 50 51 52 53 54 55 56 57 65]";
    String long_name "SeaDataNet quality flag";
    String sdn_conventions_urn "SDN:L20::";
    String type "byte";
  }
  IRRDPP01 {
    UInt32 _ChunkSizes 1, 30;
    Float32 _FillValue -1.0;
    Float32 actual_range 0.2, 2254.9;
    String ancillary_variables "IRRDPP01_SEADATANET_QC";
    String coordinates "TIME PRES LATITUDE LONGITUDE";
    String long_name "DwIrr_2-piPAR";
    String sdn_P02_name "Visible waveband radiance and irradiance measurements in the water column";
    String sdn_P02_urn "SDN:P02::VSRW";
    String sdn_parameter_name "Downwelling 2-pi scalar irradiance as photons of electromagnetic radiation (PAR wavelengths) in the water body by 2-pi scalar radiometer";
    String sdn_parameter_urn "SDN:P01::IRRDPP01";
    String sdn_uom_name "MicroEinsteins per square metre per second";
    String sdn_uom_urn "SDN:P06::UMES";
    String type "float";
    String units "uE/m^2/s";
  }
  IRRUPP01_SEADATANET_QC {
    UInt32 _ChunkSizes 1, 30;
    Byte _FillValue 57;
    String _Unsigned "false";
    Byte actual_range 49, 49;
    String Conventions "SeaDataNet measurand qualifier flags";
    String coordinates "TIME PRES LATITUDE LONGITUDE";
    String flag_meanings "no_quality_control good_value probably_good_value probably_bad_value bad_value changed_value value_below_detection value_in_excess interpolated_value missing_value value_phenomenon_uncertain";
    String flag_values "[48 49 50 51 52 53 54 55 56 57 65]";
    String long_name "SeaDataNet quality flag";
    String sdn_conventions_urn "SDN:L20::";
    String type "byte";
  }
  IRRUPP01 {
    UInt32 _ChunkSizes 1, 30;
    Float32 _FillValue -1.0;
    Float32 actual_range 0.2, 47.5;
    String ancillary_variables "IRRUPP01_SEADATANET_QC";
    String coordinates "TIME PRES LATITUDE LONGITUDE";
    String long_name "UwIrr_2-piPAR";
    String sdn_P02_name "Visible waveband radiance and irradiance measurements in the water column";
    String sdn_P02_urn "SDN:P02::VSRW";
    String sdn_parameter_name "Upwelling 2-pi scalar irradiance as photons of electromagnetic radiation (PAR wavelengths) in the water body by 2-pi scalar radiometer";
    String sdn_parameter_urn "SDN:P01::IRRUPP01";
    String sdn_uom_name "MicroEinsteins per square metre per second";
    String sdn_uom_urn "SDN:P06::UMES";
    String type "float";
    String units "uE/m^2/s";
  }
  OXYSBB01_SEADATANET_QC {
    UInt32 _ChunkSizes 1, 30;
    Byte _FillValue 57;
    String _Unsigned "false";
    Byte actual_range 49, 49;
    String Conventions "SeaDataNet measurand qualifier flags";
    String coordinates "TIME PRES LATITUDE LONGITUDE";
    String flag_meanings "no_quality_control good_value probably_good_value probably_bad_value bad_value changed_value value_below_detection value_in_excess interpolated_value missing_value value_phenomenon_uncertain";
    String flag_values "[48 49 50 51 52 53 54 55 56 57 65]";
    String long_name "SeaDataNet quality flag";
    String sdn_conventions_urn "SDN:L20::";
    String type "byte";
  }
  OXYSBB01 {
    UInt32 _ChunkSizes 1, 30;
    Float32 _FillValue -1.0;
    Float32 actual_range 78.00797, 142.3393;
    String ancillary_variables "OXYSBB01_SEADATANET_QC";
    String coordinates "TIME PRES LATITUDE LONGITUDE";
    String long_name "BKBeck";
    String sdn_P02_name "Dissolved oxygen parameters in the water column";
    String sdn_P02_urn "SDN:P02::DOXY";
    String sdn_parameter_name "Saturation of oxygen {O2 CAS 7782-44-7} in the water body [dissolved plus reactive particulate phase] by in-situ Beckmann probe and computation from concentration using Benson and Krause algorithm";
    String sdn_parameter_urn "SDN:P01::OXYSBB01";
    String sdn_uom_name "Percent";
    String sdn_uom_urn "SDN:P06::UPCT";
    String type "float";
    String units "%";
  }
  POTMCV01_SEADATANET_QC {
    UInt32 _ChunkSizes 1, 30;
    Byte _FillValue 57;
    String _Unsigned "false";
    Byte actual_range 49, 49;
    String Conventions "SeaDataNet measurand qualifier flags";
    String coordinates "TIME PRES LATITUDE LONGITUDE";
    String flag_meanings "no_quality_control good_value probably_good_value probably_bad_value bad_value changed_value value_below_detection value_in_excess interpolated_value missing_value value_phenomenon_uncertain";
    String flag_values "[48 49 50 51 52 53 54 55 56 57 65]";
    String long_name "SeaDataNet quality flag";
    String sdn_conventions_urn "SDN:L20::";
    String type "byte";
  }
  POTMCV01 {
    UInt32 _ChunkSizes 1, 30;
    Float32 _FillValue -9.0;
    Float32 actual_range 7.478305, 18.74174;
    String ancillary_variables "POTMCV01_SEADATANET_QC";
    String coordinates "TIME PRES LATITUDE LONGITUDE";
    String long_name "WC_Potemp";
    String sdn_P02_name "Temperature of the water column";
    String sdn_P02_urn "SDN:P02::TEMP";
    String sdn_parameter_name "Potential temperature of the water body by computation using UNESCO 1983 algorithm";
    String sdn_parameter_urn "SDN:P01::POTMCV01";
    String sdn_uom_name "Degrees Celsius";
    String sdn_uom_urn "SDN:P06::UPAA";
    String type "float";
    String units "degC";
  }
  PSALST01_SEADATANET_QC {
    UInt32 _ChunkSizes 1, 30;
    Byte _FillValue 57;
    String _Unsigned "false";
    Byte actual_range 49, 49;
    String Conventions "SeaDataNet measurand qualifier flags";
    String coordinates "TIME PRES LATITUDE LONGITUDE";
    String flag_meanings "no_quality_control good_value probably_good_value probably_bad_value bad_value changed_value value_below_detection value_in_excess interpolated_value missing_value value_phenomenon_uncertain";
    String flag_values "[48 49 50 51 52 53 54 55 56 57 65]";
    String long_name "SeaDataNet quality flag";
    String sdn_conventions_urn "SDN:L20::";
    String type "byte";
  }
  PSALST01 {
    UInt32 _ChunkSizes 1, 30;
    Float32 _FillValue -1.0;
    Float32 actual_range 29.556, 34.968;
    String ancillary_variables "PSALST01_SEADATANET_QC";
    String coordinates "TIME PRES LATITUDE LONGITUDE";
    String long_name "P_sal_CTD";
    String sdn_P02_name "Salinity of the water column";
    String sdn_P02_urn "SDN:P02::PSAL";
    String sdn_parameter_name "Practical salinity of the water body by CTD and computation using UNESCO 1983 algorithm";
    String sdn_parameter_urn "SDN:P01::PSALST01";
    String sdn_uom_name "Dimensionless";
    String sdn_uom_urn "SDN:P06::UUUU";
    String type "float";
    String units "Dmnless";
  }
  SIGTPR01_SEADATANET_QC {
    UInt32 _ChunkSizes 1, 30;
    Byte _FillValue 57;
    String _Unsigned "false";
    Byte actual_range 49, 49;
    String Conventions "SeaDataNet measurand qualifier flags";
    String coordinates "TIME PRES LATITUDE LONGITUDE";
    String flag_meanings "no_quality_control good_value probably_good_value probably_bad_value bad_value changed_value value_below_detection value_in_excess interpolated_value missing_value value_phenomenon_uncertain";
    String flag_values "[48 49 50 51 52 53 54 55 56 57 65]";
    String long_name "SeaDataNet quality flag";
    String sdn_conventions_urn "SDN:L20::";
    String type "byte";
  }
  SIGTPR01 {
    UInt32 _ChunkSizes 1, 30;
    Float32 _FillValue -1.0;
    Float32 actual_range 21.61166, 27.20675;
    String ancillary_variables "SIGTPR01_SEADATANET_QC";
    String coordinates "TIME PRES LATITUDE LONGITUDE";
    String long_name "SigTheta";
    String sdn_P02_name "Density of the water column";
    String sdn_P02_urn "SDN:P02::SIGT";
    String sdn_parameter_name "Sigma-theta of the water body by CTD and computation from salinity and potential temperature using UNESCO algorithm";
    String sdn_parameter_urn "SDN:P01::SIGTPR01";
    String sdn_uom_name "Kilograms per cubic metre";
    String sdn_uom_urn "SDN:P06::UKMC";
    String type "float";
    String units "kg/m^3";
  }
  TEMPST01_SEADATANET_QC {
    UInt32 _ChunkSizes 1, 30;
    Byte _FillValue 57;
    String _Unsigned "false";
    Byte actual_range 49, 49;
    String Conventions "SeaDataNet measurand qualifier flags";
    String coordinates "TIME PRES LATITUDE LONGITUDE";
    String flag_meanings "no_quality_control good_value probably_good_value probably_bad_value bad_value changed_value value_below_detection value_in_excess interpolated_value missing_value value_phenomenon_uncertain";
    String flag_values "[48 49 50 51 52 53 54 55 56 57 65]";
    String long_name "SeaDataNet quality flag";
    String sdn_conventions_urn "SDN:L20::";
    String type "byte";
  }
  TEMPST01 {
    UInt32 _ChunkSizes 1, 30;
    Float32 _FillValue -9.0;
    Float32 actual_range 7.482, 18.742;
    String ancillary_variables "TEMPST01_SEADATANET_QC";
    String coordinates "TIME PRES LATITUDE LONGITUDE";
    String long_name "WC_temp_CTD";
    String sdn_P02_name "Temperature of the water column";
    String sdn_P02_urn "SDN:P02::TEMP";
    String sdn_parameter_name "Temperature of the water body by CTD or STD";
    String sdn_parameter_urn "SDN:P01::TEMPST01";
    String sdn_uom_name "Degrees Celsius";
    String sdn_uom_urn "SDN:P06::UPAA";
    String type "float";
    String units "degC";
  }
  latitude {
    UInt32 _ChunkSizes 1;
    String _CoordinateAxisType "Lat";
    Float64 actual_range 52.50967, 55.4475;
    String ancillary_variables "POSITION_SEADATANET_QC";
    String axis "Y";
    String grid_mapping "crs";
    String ioos_category "Location";
    String long_name "Latitude";
    String sdn_P02_name "Horizontal spatial co-ordinates";
    String sdn_P02_urn "SDN:P02::ALAT";
    String sdn_parameter_name "Latitude north";
    String sdn_parameter_urn "SDN:P01::ALATZZ01";
    String sdn_uom_name "Degrees north";
    String sdn_uom_urn "SDN:P06::DEGN";
    String standard_name "latitude";
    String type "double";
    String units "degrees_north";
    Float64 valid_max 90.0;
    Float64 valid_min -90.0;
  }
  longitude {
    UInt32 _ChunkSizes 1;
    String _CoordinateAxisType "Lon";
    Float64 actual_range 2.16633, 8.19983;
    String ancillary_variables "POSITION_SEADATANET_QC";
    String axis "X";
    String grid_mapping "crs";
    String ioos_category "Location";
    String long_name "Longitude";
    String sdn_P02_name "Horizontal spatial co-ordinates";
    String sdn_P02_urn "SDN:P02::ALAT";
    String sdn_parameter_name "Longitude east";
    String sdn_parameter_urn "SDN:P01::ALONZZ01";
    String sdn_uom_name "Degrees east";
    String sdn_uom_urn "SDN:P06::DEGE";
    String standard_name "longitude";
    String type "double";
    String units "degrees_east";
    Float64 valid_max 180.0;
    Float64 valid_min -180.0;
  }
  sea_water_pressure_due_to_sea_water {
    UInt32 _ChunkSizes 1, 30;
    String _CoordinateAxisType "Height";
    Float32 _FillValue -999.0;
    Float32 actual_range 0.5, 45.5;
    String ancillary_variables "PRES_SEADATANET_QC";
    String axis "Z";
    String long_name "Pres_Z";
    String positive "down";
    String sdn_P02_name "Vertical spatial coordinates";
    String sdn_P02_urn "SDN:P02::AHGT";
    String sdn_parameter_name "Pressure (spatial coordinate) exerted by the water body by profiling pressure sensor and correction to read zero at sea level";
    String sdn_parameter_urn "SDN:P01::PRESPR01";
    String sdn_uom_name "Decibars";
    String sdn_uom_urn "SDN:P06::UPDB";
    String standard_name "sea_water_pressure_due_to_sea_water";
    String type "float";
    String units "dbar";
  }
  time {
    UInt32 _ChunkSizes 1;
    String _CoordinateAxisType "Time";
    Float64 actual_range 6.1345614e+8, 6.1446264e+8;
    String ancillary_variables "TIME_SEADATANET_QC";
    String axis "T";
    String calendar "julian";
    String ioos_category "Time";
    String legacy_time_adjust "true";
    String long_name "Chronological Julian Date";
    String sdn_P02_name "Date and time";
    String sdn_P02_urn "SDN:P02::AYMD";
    String sdn_parameter_name "Julian Date (chronological)";
    String sdn_parameter_urn "SDN:P01::CJDY1101";
    String sdn_uom_name "Days";
    String sdn_uom_urn "SDN:P06::UTAA";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String type "double";
    String units "seconds since 1970-01-01T00:00:00Z";
    String valid_max "2500000.0";
    String valid_min "0.0";
  }
 }
  NC_GLOBAL {
    String cdm_altitude_proxy "sea_water_pressure_due_to_sea_water";
    String cdm_data_type "Profile";
    String cdm_profile_variables "longitude, latitude, time, SDN_LOCAL_CDI_ID";
    String Conventions "SeaDataNet_1.0 CF-1.6, NCCSV-1.2";
    String date_update "2024-08-22T01:20:57+0100";
    Float64 Easternmost_Easting 8.19983;
    String featureType "Profile";
    Float64 geospatial_lat_max 55.4475;
    Float64 geospatial_lat_min 52.50967;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 8.19983;
    Float64 geospatial_lon_min 2.16633;
    String geospatial_lon_units "degrees_east";
    String grid_mapping_epsg_code "EPSG:4326";
    Float64 grid_mapping_inverse_flattening 298.257223563;
    String grid_mapping_name "latitude_longitude";
    Float64 grid_mapping_semi_major_axis 6378137.0;
    String history 
"2026-06-13T18:24:46Z https://www.bodc.ac.uk/resources/inventories/cruise_inventory/report/3365/
2026-06-13T18:24:46Z https://erddap.bodc.ac.uk/tabledap/3365_CH54_CTD.das";
    String infoUrl "https://www.bodc.ac.uk/resources/inventories/cruise_inventory/report/3365/";
    String institution "Plymouth Marine Laboratory";
    String license "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/";
    Float64 Northernmost_Northing 55.4475;
    String sourceUrl "https://www.bodc.ac.uk/resources/inventories/cruise_inventory/report/3365/";
    Float64 Southernmost_Northing 52.50967;
    String summary "CTD profiles from RRS Challenger cruise CH54";
    String time_coverage_end "1989-06-21T20:04:00Z";
    String time_coverage_start "1989-06-10T04:29:00Z";
    String title "CTD Profiles from RRS Challenger cruise CH54";
    Float64 Westernmost_Easting 2.16633;
  }
}

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.