Data Access Form

Dataset Title:	Sound Pressure Levels at OBSEA from a icListen Kayak hydrophone
Institution:	SARTI Research Group. Electronics Dept. Universitat Politecnica de Catalunya (UPC) (Dataset ID: OBSEA_kayak_hydrophone_spl_levels)
Information:	Summary \| License \| Metadata \| Background \| Files \| Make a graph

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Variable	Minimum	Maximum
time (timestamp, UTC)	2022-01-13T11:00:06Z	2022-02-03T06:59:51Z

SPL_full (dB re 1 µPa)	85.67817	140.9324
SPL_63Hz (dB re 1 µPa)	72.63977	121.6063
SPL_125Hz (dB re 1 µPa)	70.33495	121.3393
SPL_2000Hz (dB re 1 µPa)	60.10969	116.8875

Server-side Functions

distinct()

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File type: (more info)

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The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.642071606e+9, 1.643871591e+9;
    String axis "T";
    String ioos_category "Time";
    String long_name "timestamp";
    String source_name "timestamp";
    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";
  }
  SPL_full {
    Float32 actual_range 85.67817, 140.9324;
    String long_name "sound pressure level(full bandwidth)";
    String sdn_parameter_urn "SDN:P01::AMBNSPL1";
    String sdn_units_urn "SDN:P06:P06:UDBL";
    String units "dB re 1 µPa";
  }
  SPL_63Hz {
    Float32 actual_range 72.63977, 121.6063;
    String long_name "sound pressure level at 63 Hz third-octave band";
    String sdn_parameter_urn "SDN:P01::AMBNSP13";
    String sdn_units_urn "SDN:P06:P06:UDBL";
    String units "dB re 1 µPa";
  }
  SPL_125Hz {
    Float32 actual_range 70.33495, 121.3393;
    String long_name "sound pressure level at 125 Hz third-octave band";
    String sdn_parameter_urn "SDN:P01::AMBNSP12";
    String sdn_units_urn "SDN:P06:P06:UDBL";
    String units "dB re 1 µPa";
  }
  SPL_2000Hz {
    Float32 actual_range 60.10969, 116.8875;
    String long_name "sound pressure level at 2000 Hz third-octave band";
    String sdn_parameter_urn "SDN:P01::AMBNSP11";
    String sdn_units_urn "SDN:P06:P06:UDBL";
    String units "dB re 1 µPa";
  }
 }
  NC_GLOBAL {
    String area "Mediterranean";
    String author "Universitat Politecnica de Catalunya (UPC)";
    String cdm_data_type "Other";
    String contact "enoc.martinez@upc.edu";
    String geospatial_lat_max "41.18212";
    String geospatial_lat_min "41.18212";
    String geospatial_lon_max "1.75257";
    String geospatial_lon_min "1.75257";
    String history 
"2023-03-23T03:47:26Z (local files)
2023-03-23T03:47:26Z http://erddap.obsea.emso.eu/erddap/tabledap/OBSEA_kayak_hydrophone_spl_levels.html";
    String infoUrl "http://www.obsea.es";
    String institution "SARTI Research Group. Electronics Dept. Universitat Politecnica de Catalunya (UPC)";
    String institution_edmo_code "2150";
    String institution_references "http://www.obsea.es/, http://cdsarti.org/";
    String keywords "conductivity, Hydrophone, MSFD, OBSEA, pressure, salinity, sound_velocity, SPL, temperature, Underwater Noise, UPC";
    String license "Creative Commons Attribution 4.0 International (CC-BY-4.0)";
    String pi_name "Joaquin del Rio, joaquin.del.rio@upc.edu";
    String platform_code "OBSEA";
    String site_code "OBSEA";
    String sourceUrl "(local files)";
    String standard_name_vocabulary "CF Standard Name Table v55";
    String summary 
"Sound Pressure Level (SPL) values from a icListen Kayak hydrophone at OBSEA. SPL calculated 63, 125 and
                2000 Hz third-octave bands and full bandwidth. The SPL levels are calculated using the Welch
                (10-second time window, 1-second segments with Hann window and 50 % overlap).";
    String time_coverage_end "2022-02-03T06:59:51Z";
    String time_coverage_start "2022-01-13T11:00:06Z";
    String title "Sound Pressure Levels at OBSEA from a icListen Kayak hydrophone";
  }
}

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.