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LDL's ERDDAP
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Brought to you by LDL SIO |
| Dataset Title: | Global Drifter Program 3-Hourly, Real-Time, Global Time Series of Peak Wave Period, 2015-Present 
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| Institution: | UCSD SIO (Dataset ID: GDP_DMP_Tp) |
| Information: | Summary
| License
| FGDC
| ISO 19115
| Metadata
| Background
| Files
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Attributes {
s {
wmo_ID {
Float64 _FillValue 9223372036854775807;
Float64 actual_range 1401802, 7810916;
String ioos_category "Identifier";
String long_name "ID given by World Meteorological Organization";
String standard_name "wmo_id";
}
time {
String _CoordinateAxisType "Time";
Float64 actual_range 1.6117164e+9, 1.7761788e+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";
}
latitude {
String _CoordinateAxisType "Lat";
Float32 actual_range -23.30343, 72.97878;
String axis "Y";
Float64 colorBarMaximum 90.0;
Float64 colorBarMinimum -90.0;
String ioos_category "Location";
String long_name "degrees north";
Float32 missing_value -999.0;
String standard_name "latitude";
String units "degrees_north";
}
longitude {
String _CoordinateAxisType "Lon";
Float32 actual_range -179.9974, 179.9986;
String axis "X";
Float64 colorBarMaximum 180.0;
Float64 colorBarMinimum -180.0;
String ioos_category "Location";
String long_name "degrees east";
Float32 missing_value -999.0;
String standard_name "longitude";
String units "degrees_east";
}
peak_period {
Float64 _FillValue -999.0;
Float64 actual_range 2.0, 28.0;
Float64 colorBarMaximum 50.0;
Float64 colorBarMinimum 0.0;
String ioos_category "Statistics";
String long_name "Sea Surface Wave Period At Variance Spectral Density Maximum";
Float64 missing_value -999.0;
String short_name "Tp";
String standard_name "sea_surface_wave_period_at_variance_spectral_density_maximum";
String units "s";
}
}
NC_GLOBAL {
String acknowledgement "Centurioni, Luca R., Braasch, Lancelot, and Schönau, Martha C. (2025): Global Drifter Program 3-Hourly, Real-Time, Global Time Series of Peak Wave Period, 2015-Present. Lagrangian Drifter Laboratory, Scripps Institution of Oceanography. Dataset. https://doi.org/10.57969/S9RG6C";
String cdm_data_type "Point";
String Conventions "COARDS, CF-1.10, ACDD-1.3";
String creator_country "USA";
String creator_institution "UCSD SIO";
String creator_name "LDL";
String creator_sector "academic";
String creator_type "group";
String creator_url "https://ldl.ucsd.edu/";
Float64 Easternmost_Easting 179.9986;
String featureType "Point";
Float64 geospatial_lat_max 72.97878;
Float64 geospatial_lat_min -23.30343;
String geospatial_lat_units "degrees_north";
Float64 geospatial_lon_max 179.9986;
Float64 geospatial_lon_min -179.9974;
String geospatial_lon_units "degrees_east";
String history
"2026-04-27T19:52:31Z (local files)
2026-04-27T19:52:31Z https://erddap.ldl.ucsd.edu/erddap/tabledap/GDP_DMP_Tp.html";
String infoUrl "https://ldl.ucsd.edu/ldl/gdp-drifter-data";
String institution "UCSD SIO";
String keywords "2015-present, 3-hourly, california, control, current, currents, data, degrees, deigo, density, direction, drifter, earth, Earth Science > Oceans > Ocean Waves > Wave Period, Earth Science > Oceans > Ocean Waves > Wave Spectra, east, given, global, gps, gts, hour, hourly, identifier, institution, iridium, lagrangian drifter laboratory, latitude, ldl, longitude, maximum, meteorological, meteorology, microsvp, north, ocean, oceanography, oceans, organisation, organization, peak, peak_period, period, positioning, present, program, quality, real, real time, real-time, realtime, san, sap, science, scripps, sea, sea_surface_wave_period_at_variance_spectral_density_maximum, seawater, second, series, sio, spd, spectra, spectral, speed, sst, statistics, status, surface, surface velocity program, system, telecommunications, temperature, time, time series, timestamp, ucsd, university, variance, velocity, water, wave, waves, wmo, wmo_id, world";
String keywords_vocabulary "GCMD Science Keywords";
String license "Copyright Notice This data is Copyright © 2025 The Regents of the University of California. All Rights Reserved. Permission to copy, modify, and distribute this data and its documentation for educational, research and non-profit purposes, without fee, and without a written agreement is hereby granted, provided that the above copyright notice, this paragraph and the following three paragraphs appear in all copies. Permission to make commercial use of this data may be obtained by contacting: Office of Innovation and Commercialization 9500 Gilman Drive, Mail Code 0910 University of California La Jolla, CA 92093-0910 innovation@ucsd.edu This data and documentation are copyrighted by The Regents of the University of California. The data and documentation are supplied “as is”, without any accompanying services from The Regents. The Regents does not warrant that the operation of the program will be uninterrupted or error-free. The end-user understands that the program was developed for research purposes and is advised not to rely exclusively on the program for any reason. IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS, ARISING OUT OF THE USE OF THIS DATA AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE DATA PROVIDED HEREUNDER IS ON AN “AS IS” BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATIONS TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.";
Float64 Northernmost_Northing 72.97878;
String publisher_email "ldl-datasets [at] ucsd [dot] edu";
String publisher_institution "UCSD SIO";
String publisher_name "Lagrangian Drifter Laboratory (LDL)";
String publisher_type "group";
String reference_doi "https://doi.org/10.57969/S9RG6C";
String sourceUrl "(local files)";
Float64 Southernmost_Northing -23.30343;
String standard_name_vocabulary "CF Standard Name Table v70";
String summary "Global time series of 3-hourly, real-time peak wave period (Tp) measured by Directional Wave Spectra Drifters (DWSDs), where Tp is defined as the frequency of peak wave energy over the observed frequency range, typically from 0.031 to 0.5 Hz, in a 30-minute period. The DWSD drifters are undrogued. Data spans from 2015-present. This file is for Year: 2026; Month: 04. The data was funded by NOAA under the Global Drifter Program and collected and provided by the Lagrangian Drifter Laboratory at Scripps Institution of Oceanography. No quality control has been applied except to indicate missing data values. Data that was reported not on the 3-hourly timestamp have had their timestamp adjusted to 3-hrly if within an hour of the reported time.";
String testOutOfDate "now-17days";
String time_coverage_end "2026-04-14T15:00:00Z";
String time_coverage_start "2021-01-27T03:00:00Z";
String title "Global Drifter Program 3-Hourly, Real-Time, Global Time Series of Peak Wave Period, 2015-Present";
Float64 Westernmost_Easting -179.9974;
}
}
Data Access Protocol (DAP) and its
selection constraints.
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.