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Dataset Title:  SPL data from a Naxys Hydrophone at OBSEA (30min average) Subscribe RSS
Institution:  Polytechnic University of Catalonia   (Dataset ID: EMSO_OBSEA_NAXYS_SPL_30min)
Range: longitude = 1.75257 to 1.75257°E, latitude = 41.18212 to 41.18212°N, depth = 20.0 to 20.0m, time = 2023-12-11T00:00:00Z to 2024-04-23T10:30:00Z
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Things You Can Do With Your Graphs

Well, you can do anything you want with your graphs, of course. But some things you might not have considered are:

The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  time {
    Int32 _ChunkSizes 22;
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.7022528e+9, 1.7138682e+9;
    String axis "T";
    String ioos_category "Time";
    String long_name "time of measurements";
    String sdn_parameter_name "Elapsed time relative to 1970-01-01T00:00:00Z";
    String sdn_parameter_uri "https://vocab.nerc.ac.uk/collection/P01/current/ELTMEP01/";
    String sdn_parameter_urn "SDN:P01::ELTMEP01";
    String sdn_uom_name "Seconds";
    String sdn_uom_uri "https://vocab.nerc.ac.uk/collection/P06/current/UTBB/";
    String sdn_uom_urn "SDN:P06::UTBB";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String time_precision "1970-01-01T00:00:00Z";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  latitude {
    Int32 _ChunkSizes 1;
    String _CoordinateAxisType "Lat";
    Float32 _FillValue -999999.0;
    Float32 actual_range 41.18212, 41.18212;
    String ancillary_variables "LATITUDE_QC";
    String axis "Y";
    String ioos_category "Location";
    String long_name "latitude of measurements";
    String sdn_parameter_name "Latitude north";
    String sdn_parameter_uri "https://vocab.nerc.ac.uk/collection/P01/current/ALATZZ01";
    String sdn_parameter_urn "SDN:P01::ALATZZ01";
    String sdn_uom_name "Degrees";
    String sdn_uom_uri "https://vocab.nerc.ac.uk/collection/P06/current/UAAA/";
    String sdn_uom_urn "SDN:P06::UAAA";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    Int32 _ChunkSizes 1;
    String _CoordinateAxisType "Lon";
    Float32 _FillValue -999999.0;
    Float32 actual_range 1.75257, 1.75257;
    String ancillary_variables "LONGITUDE_QC";
    String axis "X";
    String ioos_category "Location";
    String long_name "longitude of measurements";
    String sdn_parameter_name "Longitude east";
    String sdn_parameter_uri "https://vocab.nerc.ac.uk/collection/P01/current/ALONZZ01";
    String sdn_parameter_urn "SDN:P01::ALONZZ01";
    String sdn_uom_name "Degrees";
    String sdn_uom_uri "https://vocab.nerc.ac.uk/collection/P06/current/UAAA/";
    String sdn_uom_urn "SDN:P06::UAAA";
    String standard_name "longitude";
    String units "degrees_east";
  }
  depth {
    Int32 _ChunkSizes 1;
    String _CoordinateAxisType "Height";
    String _CoordinateZisPositive "down";
    Float32 _FillValue -999999.0;
    Float32 actual_range 20.0, 20.0;
    String ancillary_variables "DEPTH_QC";
    String axis "Z";
    String ioos_category "Location";
    String long_name "depth of measurements";
    String positive "down";
    String sdn_parameter_name "Depth (spatial coordinate) relative to water surface in the water body";
    String sdn_parameter_uri "https://vocab.nerc.ac.uk/collection/P01/current/ADEPZZ01";
    String sdn_parameter_urn "SDN:P01::ADEPZZ01";
    String sdn_uom_name "Metres";
    String sdn_uom_uri "https://vocab.nerc.ac.uk/collection/P06/current/ULAA/";
    String sdn_uom_urn "SDN:P06::ULAA";
    String standard_name "depth";
    String units "m";
  }
  SPL_ALL {
    Int32 _ChunkSizes 1, 1, 1, 22;
    Float32 _FillValue -999999.0;
    Float32 actual_range 95.8218, 126.0272;
    String ancillary_variables "SPL_ALL_QC;SPL_ALL_STD";
    String coordinates "LATITUDE;LONGITUDE;DEPTH;TIME";
  }
  SPL_63 {
    Int32 _ChunkSizes 1, 1, 1, 22;
    Float32 _FillValue -999999.0;
    Float32 actual_range 74.5179, 101.8671;
    String ancillary_variables "SPL_63_QC;SPL_63_STD";
    String coordinates "LATITUDE;LONGITUDE;DEPTH;TIME";
    String long_name "Sound pressure level (SPL) of ambient noise at the 63Hz-centered frequency band the with a time window of 10 seconds. The SPL values are computed using the Welch method with a time window of 10 seconds, using 1-second segments, Hann window and 50% overlap.\",";
    String sdn_parameter_name "Sound pressure level of ambient noise (63Hz-centred one-third-octave frequency band, time interval specified elsewhere) relative to 1 micropascal in the water body";
    String sdn_parameter_uri "https://vocab.nerc.ac.uk/collection/P01/current/AMBNSP19/";
    String sdn_parameter_urn "SDN:P01::AMBNSP19";
    String sdn_uom_name "Decibels";
    String sdn_uom_uri "https://vocab.nerc.ac.uk/collection/P06/current/UDBL/";
    String sdn_uom_urn "SDN:P06::UDBL";
    String sensor_manufacturer "Naxys";
    String sensor_manufacturer_uri "https://vocab.nerc.ac.uk/collection/L35/current/MAN0144/";
    String sensor_manufacturer_urn "SDN:L35::MAN0144";
    String sensor_model "Naxys Ehyd 02345 ethernet hydrophone";
    String sensor_mount "mounted_on_fixed_structure";
    String sensor_orientation "upward";
    String sensor_reference "https://vocab.nerc.ac.uk/collection/L22/current/TOOL1593/";
    String sensor_SeaVoX_L22_code "SDN:L22::TOOL1593";
    String sensor_serial_number "0010";
    String standard_name "sound_pressure_level_63hz_10s";
    String standard_name_uri "sound_pressure_level_63Hz_10s";
    String units "Decibels";
  }
  SPL_125 {
    Int32 _ChunkSizes 1, 1, 1, 22;
    Float32 _FillValue -999999.0;
    Float32 actual_range 75.2913, 103.499;
    String ancillary_variables "SPL_125_QC;SPL_125_STD";
    String coordinates "LATITUDE;LONGITUDE;DEPTH;TIME";
    String long_name "Sound pressure level (SPL) of ambient noise at the 125Hz-centered frequency band the with a time window of 10 seconds. The SPL values are computed using the Welch method with a time window of 10 seconds, using 1-second segments, Hann window and 50% overlap.\",";
    String sdn_parameter_name "Sound pressure level of ambient noise (125Hz-centred one-third-octave frequency band, time interval specified elsewhere) relative to 1 micropascal in the water body";
    String sdn_parameter_uri "https://vocab.nerc.ac.uk/collection/P01/current/AMBNSP22";
    String sdn_parameter_urn "SDN:P01::AMBNSP22";
    String sdn_uom_name "Decibels";
    String sdn_uom_uri "https://vocab.nerc.ac.uk/collection/P06/current/UDBL/";
    String sdn_uom_urn "SDN:P06::UDBL";
    String sensor_manufacturer "Naxys";
    String sensor_manufacturer_uri "https://vocab.nerc.ac.uk/collection/L35/current/MAN0144/";
    String sensor_manufacturer_urn "SDN:L35::MAN0144";
    String sensor_model "Naxys Ehyd 02345 ethernet hydrophone";
    String sensor_mount "mounted_on_fixed_structure";
    String sensor_orientation "upward";
    String sensor_reference "https://vocab.nerc.ac.uk/collection/L22/current/TOOL1593/";
    String sensor_SeaVoX_L22_code "SDN:L22::TOOL1593";
    String sensor_serial_number "0010";
    String standard_name "sound_pressure_level_125hz_10s";
    String standard_name_uri "sound_pressure_level_125Hz_10s";
    String units "Decibels";
  }
  SPL_2000 {
    Int32 _ChunkSizes 1, 1, 1, 22;
    Float32 _FillValue -999999.0;
    Float32 actual_range 74.0326, 90.4462;
    String ancillary_variables "SPL_2000_QC;SPL_2000_STD";
    String coordinates "LATITUDE;LONGITUDE;DEPTH;TIME";
    String long_name "Sound pressure level (SPL) of ambient noise at the 2000Hz-centered frequency band the with a time window of 10 seconds. The SPL values are computed using the Welch method with a time window of 10 seconds, using 1-second segments, Hann window and 50% overlap.\",";
    String sdn_parameter_name "Sound pressure level of ambient noise (2000Hz-centred one-third-octave frequency band, time interval specified elsewhere) relative to 1 micropascal in the water body";
    String sdn_parameter_uri "https://vocab.nerc.ac.uk/collection/P01/current/AMBNSP34";
    String sdn_parameter_urn "SDN:P01::AMBNSP34";
    String sdn_uom_name "Decibels";
    String sdn_uom_uri "https://vocab.nerc.ac.uk/collection/P06/current/UDBL/";
    String sdn_uom_urn "SDN:P06::UDBL";
    String sensor_manufacturer "Naxys";
    String sensor_manufacturer_uri "https://vocab.nerc.ac.uk/collection/L35/current/MAN0144/";
    String sensor_manufacturer_urn "SDN:L35::MAN0144";
    String sensor_model "Naxys Ehyd 02345 ethernet hydrophone";
    String sensor_mount "mounted_on_fixed_structure";
    String sensor_orientation "upward";
    String sensor_reference "https://vocab.nerc.ac.uk/collection/L22/current/TOOL1593/";
    String sensor_SeaVoX_L22_code "SDN:L22::TOOL1593";
    String sensor_serial_number "0010";
    String standard_name "sound_pressure_level_2000hz_10s";
    String standard_name_uri "sound_pressure_level_2000Hz_10s";
    String units "Decibels";
  }
  SPL_ALL_QC {
    Int32 _ChunkSizes 1, 1, 1, 22;
    Byte _FillValue -63;
    String _Unsigned "false";
    Byte actual_range 1, 1;
  }
  SPL_63_QC {
    Int32 _ChunkSizes 1, 1, 1, 22;
    Byte _FillValue -63;
    String _Unsigned "false";
    Byte actual_range 1, 1;
    String conventions "OceanSITES QC Flags";
    String flag_meanings "unknown;good_data;probably_good_data;potentially_correctable_bad_data;bad_data;nominal_value;interpolated_value;missing_value";
    String flag_values "0;1;2;3;4;7;8;9";
    String long_name "Sound pressure level (SPL) of ambient noise at the 63Hz-centered frequency band the with a time window of 10 seconds. The SPL values are computed using the Welch method with a time window of 10 seconds, using 1-second segments, Hann window and 50% overlap.\", quality control flags";
  }
  SPL_125_QC {
    Int32 _ChunkSizes 1, 1, 1, 22;
    Byte _FillValue -63;
    String _Unsigned "false";
    Byte actual_range 1, 1;
    String conventions "OceanSITES QC Flags";
    String flag_meanings "unknown;good_data;probably_good_data;potentially_correctable_bad_data;bad_data;nominal_value;interpolated_value;missing_value";
    String flag_values "0;1;2;3;4;7;8;9";
    String long_name "Sound pressure level (SPL) of ambient noise at the 125Hz-centered frequency band the with a time window of 10 seconds. The SPL values are computed using the Welch method with a time window of 10 seconds, using 1-second segments, Hann window and 50% overlap.\", quality control flags";
  }
  SPL_2000_QC {
    Int32 _ChunkSizes 1, 1, 1, 22;
    Byte _FillValue -63;
    String _Unsigned "false";
    Byte actual_range 1, 1;
    String conventions "OceanSITES QC Flags";
    String flag_meanings "unknown;good_data;probably_good_data;potentially_correctable_bad_data;bad_data;nominal_value;interpolated_value;missing_value";
    String flag_values "0;1;2;3;4;7;8;9";
    String long_name "Sound pressure level (SPL) of ambient noise at the 2000Hz-centered frequency band the with a time window of 10 seconds. The SPL values are computed using the Welch method with a time window of 10 seconds, using 1-second segments, Hann window and 50% overlap.\", quality control flags";
  }
  latitude_QC {
    Int32 _ChunkSizes 1, 1, 1, 22;
    Byte _FillValue -63;
    String _Unsigned "false";
    Byte actual_range 7, 7;
    String conventions "OceanSITES QC Flags";
    String flag_meanings "unknown;good_data;probably_good_data;potentially_correctable_bad_data;bad_data;nominal_value;interpolated_value;missing_value";
    String flag_values "0;1;2;3;4;7;8;9";
    String long_name "latitude of measurements quality control flags";
  }
  longitude_QC {
    Int32 _ChunkSizes 1, 1, 1, 22;
    Byte _FillValue -63;
    String _Unsigned "false";
    Byte actual_range 7, 7;
    String conventions "OceanSITES QC Flags";
    String flag_meanings "unknown;good_data;probably_good_data;potentially_correctable_bad_data;bad_data;nominal_value;interpolated_value;missing_value";
    String flag_values "0;1;2;3;4;7;8;9";
    String long_name "longitude of measurements quality control flags";
  }
  depth_QC {
    Int32 _ChunkSizes 1, 1, 1, 22;
    Byte _FillValue -63;
    String _Unsigned "false";
    Byte actual_range 7, 7;
    String conventions "OceanSITES QC Flags";
    String flag_meanings "unknown;good_data;probably_good_data;potentially_correctable_bad_data;bad_data;nominal_value;interpolated_value;missing_value";
    String flag_values "0;1;2;3;4;7;8;9";
    String long_name "depth of measurements quality control flags";
  }
 }
  NC_GLOBAL {
    String cdm_data_type "Point";
    String Conventions "OceanSITES;EMSO, NCCSV-1.1";
    String data_mode "R";
    String data_type "OceanSITES time-series data";
    String date_created "2024-04-23T11:05:14Z";
    String date_modified "2024-04-23T11:05:14Z";
    Float64 Easternmost_Easting 1.75257;
    String emso_facility "OBSEA";
    String featureType "Point";
    String format_version "1.4";
    Float64 geospatial_lat_max 41.18212;
    Float64 geospatial_lat_min 41.18212;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 1.75257;
    Float64 geospatial_lon_min 1.75257;
    String geospatial_lon_units "degrees_east";
    Float64 geospatial_vertical_max 20.0;
    Float64 geospatial_vertical_min 20.0;
    String geospatial_vertical_positive "down";
    String geospatial_vertical_units "m";
    String history 
"2024-12-04T11:36:21Z (local files)
2024-12-04T11:36:21Z https://erddap.emso.eu/tabledap/EMSO_OBSEA_NAXYS_SPL_30min.das";
    String infoUrl "https://edmo.seadatanet.org/report/2150";
    String institution "Polytechnic University of Catalonia";
    String institution_edmo_code "2150";
    String institution_edmo_uri "https://edmo.seadatanet.org/report/2150";
    String keywords "SPL_125, SPL_2000, SPL_63, SPL_ALL";
    String keywords_vocabulary "SeaDataNet Parameter Discovery Vocabulary";
    String license "CC-BY-4.0";
    String license_uri "https://spdx.org/licenses/CC-BY-4.0";
    String network "EMSO";
    Float64 Northernmost_Northing 41.18212;
    String principal_investigator "Joaquin del Rio";
    String principal_investigator_email "joaquin.del.rio@upc.edu";
    String source "mooring";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 41.18212;
    String standard_name_vocabulary "CF Standard Name Table v70";
    String subsetVariables "SPL_ALL_QC, SPL_63_QC, SPL_125_QC, SPL_2000_QC, latitude_QC, longitude_QC, depth_QC";
    String summary "Sound Pressure Level (ambient noise) from hydrophone data collected at OBSEA by a Naxys Ethernet 02345 Hydrophone and processed in real-time using the SWE Bridge software, 30min average. The SPL values are calculated with a time-window of 10 seconds.";
    String time_coverage_end "2024-04-23T10:30:00Z";
    String time_coverage_start "2023-12-11T00:00:00Z";
    String title "SPL data from a Naxys Hydrophone at OBSEA (30min average)";
    String update_interval "void";
    Float64 Westernmost_Easting 1.75257;
  }
}

 

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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