Easier access to scientific data
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ERDDAP
Easier access to scientific data |
Brought to you by NOAA NMFS SWFSC ERD |
| Dataset Title: | California Underwater Glider Network (CUGN) - CUGN Line 56 - California Underwater Glider Network - Line 56, Science Quality Binned Data 
|
| Institution: | University of California - San Diego; Scripps (Dataset ID: sccoos-cugn-binnedCUGN56) |
| Information: | Summary
| License
| FGDC
| ISO 19115
| Metadata
| Background
| Subset
| Make a graph
|
Attributes {
s {
acoustic_backscatter {
UInt32 _ChunkSizes 11, 70000;
Float64 _FillValue -9999.9;
Float64 actual_range 48.848363859329034, 93.00237712881902;
String comment "Uncalibrated acoustic backscatter from acoustic doppler profilers. Prior to 2013, Spray deployments used a 750kHz Sontek ADP, in 2013 Spray gliders transitioned to using 1MHz Nortek AD2CP. Use the acoustic_backscatter_flag variable to see which sensor was used for a given deployment.";
String coordinates "time z longitude latitude";
String ioos_category "Unknown";
String long_name "Acoustic Backscatter";
String non_null_count "363964";
String units "dB";
}
acoustic_backscatter_flag {
UInt32 _ChunkSizes 11, 70000;
Float64 _FillValue -9999.9;
Float64 actual_range 1.0, 1.0;
String comment "Indicator flag for the acoustic backscatter sensor which can vary by mission. A value of 0 indicates measurements were taken with a 750kHz Sontek ADP. A value of 1 indicates measurements were taken with a 1MHz Nortek AD2CP. Prior to 2013, Spray deployments used a 750kHz Sontek ADP, in 2013 Spray gliders transitioned to using 1MHz Nortek AD2CP.";
String coordinates "time z longitude latitude";
String ioos_category "Identifier";
String non_null_count "531650";
}
chlorophyll_a {
UInt32 _ChunkSizes 11, 70000;
Float64 _FillValue -9999.9;
Float64 actual_range 0.08571428571428572, 12.272699999999999;
String comment "Chlorophyll-a concentration estimated from fluorescence measurements.";
String coordinates "time z longitude latitude";
String ioos_category "Ocean Color";
String long_name "Chlorophyll-a concentration";
String non_null_count "392526";
String standard_name "mass_concentration_of_chlorophyll_a_in_sea_water";
String units "mg m-3";
}
crs {
Int32 actual_range -2147483647, -2147483647;
String ioos_category "Unknown";
String non_null_count "0";
}
doxy {
UInt32 _ChunkSizes 11, 70000;
Float64 _FillValue -9999.9;
Float64 actual_range 10.813453014234419, 349.8809580488579;
String coordinates "time z longitude latitude";
String ioos_category "Dissolved O2";
String long_name "Dissolved oxygen";
String non_null_count "387437";
String standard_name "moles_of_oxygen_per_unit_mass_in_sea_water";
String units "micromol kg-1";
}
lat_uv {
UInt32 _ChunkSizes 11, 70000;
Float64 _FillValue -9999.9;
Float64 actual_range 36.75764, 38.59229069789592;
String comment
"The estimated latitude of the midpoint of the dive.
For a glider profiling continuously, this latitude is 1/2 of the way between GPS fixes at the beginning and end of dives. This is the latitude to use with depth-averaged velocity (u_depth_mean, v_depth_mean) which is an average throughout the dive";
String coordinates "time z longitude latitude";
String ioos_category "Location";
String long_name "Latitude";
String non_null_count "548350";
String standard_name "latitude";
String units "degrees_north";
}
latitude {
String _CoordinateAxisType "Lat";
Float64 _FillValue -9999.9;
Float64 actual_range 36.75746, 38.59224104684388;
String axis "Y";
String comment
"The estimated latitude of the midpoint of the profile.
For a glider profiling continuously, this latitude is 3/4 of the way between GPS fixes at the beginning and end of dives. This is the latitude to use with the temperature and salinity variables, which are measured on the ascent only.";
String ioos_category "Location";
String long_name "Latitude";
String non_null_count "770000";
String standard_name "latitude";
String units "degrees_north";
}
lon_uv {
UInt32 _ChunkSizes 11, 70000;
Float64 _FillValue -9999.9;
Float64 actual_range -126.895925, -121.99557;
String comment
"The estimated longitude of the midpoint of the dive.
For a glider profiling continuously, this longitude is 1/2 of the way between GPS fixes at the beginning and end of dives. This is the longitude to use with depth-averaged velocity (u_depth_mean, v_depth_mean) which is an average throughout the dive";
String coordinates "time z longitude latitude";
String ioos_category "Location";
String long_name "Longitude";
String non_null_count "548350";
String standard_name "longitude";
String units "degrees_east";
}
longitude {
String _CoordinateAxisType "Lon";
Float64 _FillValue -9999.9;
Float64 actual_range -126.8960425, -121.996485;
String axis "X";
String comment
"The estimated longitude of the midpoint of the profile.
For a glider profiling continuously, this longitude is 3/4 of the way between GPS fixes at the beginning and end of dives. This is the longitude to use with the temperature and salinity variables, which are measured on the ascent only.";
String ioos_category "Location";
String long_name "Longitude";
String non_null_count "770000";
String standard_name "longitude";
String units "degrees_east";
}
mission {
UInt32 _ChunkSizes 11, 70000;
Int32 _FillValue -9999;
Int32 actual_range 9, 19;
String comment "ATTENTION, please use trajectory_index instead. - This dataset combines several underwater glider missions, i.e. several deployments. Profiles originated from the same mission have the same trajectory_index number. The names of the missions can be obtained from the variable mission_name, so that trajectory_index=0 relates to the first item in the variable mission_name.";
String coordinates "time z longitude latitude";
String ioos_category "Identifier";
String long_name "Mission name of each trajectory";
String non_null_count "548350";
}
mission_profile {
UInt32 _ChunkSizes 11, 70000;
Int32 _FillValue -9999;
Int32 actual_range 1, 1418;
String coordinates "time z longitude latitude";
String ioos_category "Unknown";
String long_name "Profile of one mission";
String non_null_count "548350";
}
salinity {
UInt32 _ChunkSizes 11, 70000;
Float64 _FillValue -9999.9;
Float64 actual_range 31.812863636363645, 34.3055;
String coordinates "time z longitude latitude";
String ioos_category "Salinity";
String long_name "Sea Water Salinity";
String non_null_count "395135";
String standard_name "sea_water_practical_salinity";
String units "1";
}
temperature {
UInt32 _ChunkSizes 11, 70000;
Float64 _FillValue -9999.9;
Float64 actual_range 4.6935, 19.679166666666667;
String coordinates "time z longitude latitude";
String ioos_category "Temperature";
String long_name "Sea Water Temperature";
String non_null_count "395489";
String standard_name "sea_water_temperature";
String units "degree_C";
}
time {
String _CoordinateAxisType "Time";
Float64 actual_range 1.684974548e+9, 1.777300568e+9;
String axis "T";
String comment
"The estimated time of the midpoint of the profile.
For a glider profiling continuously, this time is 3/4 of the way between GPS fixes at the beginning and end of dives. This is the time to use with the temperature and salinity variables, which are measured on the ascent only.";
String ioos_category "Time";
String long_name "Time";
String non_null_count "770000";
String standard_name "time";
String time_origin "01-JAN-1970 00:00:00";
String units "seconds since 1970-01-01T00:00:00Z";
}
time_uv {
UInt32 _ChunkSizes 11, 70000;
Float64 actual_range 1.684973847e+9, 1.777299944e+9;
String calendar "standard";
String comment
"The estimated time of the midpoint of the dive.
For a glider profiling continuously, this time is 1/2 of the way between GPS fixes at the beginning and end of dives. This is the time to use with depth-averaged velocity (u_depth_mean, v_depth_mean) which is an average throughout the dive.";
String coordinates "time z longitude latitude";
String ioos_category "Time";
String long_name "Time";
String non_null_count "548350";
String standard_name "time";
String time_origin "01-JAN-1970 00:00:00";
String units "seconds since 1970-01-01T00:00:00Z";
}
trajectory {
Int32 actual_range 9, 19;
String cf_role "trajectory_id";
String ioos_category "Identifier";
String long_name "trajectory identifier";
String non_null_count "770000";
}
u {
UInt32 _ChunkSizes 11, 70000;
Float64 _FillValue -9999.9;
Float64 actual_range -0.7831969709885815, 0.650239617381544;
String comment "Zonal component of the water velocity measured with ADCP on different depths.";
String coordinates "time z longitude latitude";
String ioos_category "Currents";
String long_name "Eastward Sea Water Velocity";
String non_null_count "377231";
String standard_name "eastward_sea_water_velocity";
String units "m s-1";
}
u_depth_mean {
UInt32 _ChunkSizes 11, 70000;
Float64 _FillValue -9999.9;
Float64 actual_range -0.3787176585415744, 0.28220631616933617;
String comment "Depth-averaged water velocity (zonal component) which is an average throughout the dive as defined by Rudnick et. al. 2018 (doi: 10.1175/JTECH-D-17-0200.1).";
String coordinates "time z longitude latitude";
String ioos_category "Currents";
String long_name "Depth-Averaged Eastward Sea Water Velocity";
String non_null_count "389250";
String standard_name "eastward_sea_water_velocity";
String units "m s-1";
}
v {
UInt32 _ChunkSizes 11, 70000;
Float64 _FillValue -9999.9;
Float64 actual_range -0.8700131823549265, 0.7982526362413087;
String comment "Meridional component of the water velocity measured with ADCP on different depths.";
String coordinates "time z longitude latitude";
String ioos_category "Currents";
String long_name "Northward Sea Water Velocity";
String non_null_count "377231";
String standard_name "northward_sea_water_velocity";
String units "m s-1";
}
v_depth_mean {
UInt32 _ChunkSizes 11, 70000;
Float64 _FillValue -9999.9;
Float64 actual_range -0.38693729680078864, 0.35790437322864527;
String comment "Depth-averaged water velocity (meridional component) which is an average throughout the dive as defined by Rudnick et. al. 2018 (doi: 10.1175/JTECH-D-17-0200.1).";
String coordinates "time z longitude latitude";
String ioos_category "Currents";
String long_name "Depth-Averaged Northward Sea Water Velocity";
String non_null_count "389250";
String standard_name "northward_sea_water_velocity";
String units "m s-1";
}
z {
Float64 _FillValue -9999.9;
Float64 actual_range 10.0, 500.0;
String axis "Z";
String ioos_category "Location";
String non_null_count "770000";
}
}
NC_GLOBAL {
String _NCProperties "version=2,netcdf=4.7.4,hdf5=1.10.6";
String acknowledgement "Funded by National Oceanic and Atmospheric Administration (NOAA): Global Ocean Monitoring and Observing (GOMO) Program and Integrated Ocean Observing System. Supported by Instrument Development Group - Scripps Institution of Oceanography";
String cdm_data_type "Trajectory";
String cdm_trajectory_variables "mission,trajectory";
String contributor_name "Daniel Rudnick, Jennifer Sevadjian";
String contributor_role "principalInvestigator, resourceProvider";
String contributor_role_vocabulary "https://vocab.nerc.ac.uk/collection/G04/current";
String Conventions "CF-1.8, ACDD-1.3, Spray-0.1, COARDS";
String creator_email "idgdata@ucsd.edu";
String creator_institution "Scripps Institution of Oceanography";
String creator_institution_id "https://ror.org/04v7hvq31";
String creator_name "Instrument Development Group";
String creator_type "group";
String creator_url "https://spraydata.ucsd.edu";
String date_created "2026-07-06T00:33:11Z";
String date_issued "2026-07-06T00:33:11Z";
String date_modified "2026-07-06T00:00:43Z";
String doi "10.21238/S8SPRAY1618";
Float64 Easternmost_Easting -121.996485;
String featureType "Trajectory";
String geospatial_bbox "POLYGON ((-121.996485 36.75746, -121.996485 38.59224104684388, -126.8960425 38.59224104684388, -126.8960425 36.75746, -121.996485 36.75746))";
String geospatial_bounds "POLYGON ((-122.0493075 36.75746, -126.872315 37.04943249999999, -126.89188 37.1110475, -126.8955825 37.1411575, -126.8960425 37.1747225, -126.8941975 37.2076875, -126.888555 37.24455, -126.880925 37.2814525, -126.673795 38.0779975, -126.5989225 38.2942725, -126.5913525 38.2988775, -123.6691515745952 38.59191284894796, -123.6622997237856 38.59224104684388, -123.646253604668 38.5914489866628, -123.637779675832 38.5906465132914, -123.6260340274959 38.58936453987419, -123.4679061954357 38.56992411165569, -123.4665085863072 38.56947733496707, -123.3591884363664 38.51864406401149, -123.3270245268796 38.5016034040865, -121.996485 36.7712675, -122.0002725 36.768725, -122.0093175 36.7645175, -122.01982 36.76161, -122.030445 36.75919500000001, -122.0493075 36.75746))";
String geospatial_bounds_crs "EPSG:4326";
String geospatial_bounds_vertical_crs "EPSG:5831";
Float64 geospatial_lat_max 38.59224104684388;
Float64 geospatial_lat_min 36.75746;
String geospatial_lat_units "degrees_north";
Float64 geospatial_lon_max -121.996485;
Float64 geospatial_lon_min -126.8960425;
String geospatial_lon_units "degrees_east";
String geospatial_vertical_max "500.0";
String geospatial_vertical_min "10.0";
String geospatial_vertical_positive "down";
String geospatial_vertical_units "m";
String history
"2026-07-06T00:00:23Z (local files)
2026-07-06T00:00:23Z http://spraydata.ucsd.edu/erddap/tabledap/binnedCUGN56.nc?&time%3E=2023-05-25
2026-07-08T04:28:13Z https://files.platforms.axds.co/sccoos/cugn/binnedCUGN56/binnedCUGN56_processed.nc
2026-07-08T04:28:13Z http://erddap.caloos.org/erddap/tabledap/sccoos-cugn-binnedCUGN56.html";
String id "binnedCUGN56";
String infoUrl "https://portal.axds.co/?portal_id=152#platform/7e897c67-5ca9-568f-8a9d-ff858848cbcd/v2";
String institution "University of California - San Diego; Scripps";
String institution_id "https://ror.org/04v7hvq31";
String keywords "backscatter, calcofi, california, chemistry, chlorophyll, chlorophyll-a, chlorophyll_a, circulation, color, concentration, cooperative, currents, data, density, depth, depth-averaged, diego, dissolved, dissolved o2, doxy, each, earth, Earth Science > Oceans > Ocean Chemistry > Chlorophyll, Earth Science > Oceans > Ocean Chemistry > Oxygen, Earth Science > Oceans > Ocean Circulation > Ocean Currents, Earth Science > Oceans > Ocean Temperature > Water Temperature, Earth Science > Oceans > Salinity/Density > Salinity, eastward, eastward_sea_water_velocity, fisheries, fluorescence, glider, identifier, institution, investigations, lat_uv, latitude, line, lon_uv, longitude, mass, mass_concentration_of_chlorophyll_a_in_sea_water, mission, mission_profile, moles, moles_of_oxygen_per_unit_mass_in_sea_water, name, network, northward, northward_sea_water_velocity, O2, ocean, ocean color, oceanic, oceanography, oceans, one, oxygen, part, per, practical, pressure, profile, salinity, san, science, scripps, sea, sea_water_practical_salinity, sea_water_temperature, seawater, temperature, time, time_uv, trajectory, trajectory_index, u, u_depth_mean, underwater, underwater glider, university, velocity, water";
String keywords_vocabulary "GCMD Science Keywords";
String license
"The data may be used and redistributed for free but is not intended
for legal use, since it may contain inaccuracies. Neither the data
Contributor, ERD, NOAA, nor the United States Government, nor any
of their employees or contractors, makes any warranty, express or
implied, including warranties of merchantability and fitness for a
particular purpose, or assumes any legal liability for the accuracy,
completeness, or usefulness, of this information.";
String metadata_link "https://spraydata.ucsd.edu";
String naming_authority "edu.ucsd.idg";
String network "OceanGliders > BOON > Northeast Pacific Ocean > California Underwater Glider Network, California Underwater Glider Network (CUGN), IOOS";
Float64 Northernmost_Northing 38.59224104684388;
String packrat_source "sccoos.cugn.cugn";
String packrat_source_id "binnedCUGN56";
String packrat_uuid "7e897c67-5ca9-568f-8a9d-ff858848cbcd";
String platform_category "glider";
String platform_institution "Scripps Institution of Oceanography";
String platform_type "glider";
String processing_level "Level 3 - This is postprocessed, delayed mode data that has been quality controlled by IDG personnel. Outliers have been removed and data are binned at 10m vertical resolution for ease of use. This dataset contains data from multiple glider deployments over time at the location identified by the project and site metadata attributes. Contact the creator_email for more details.";
String project "California Underwater Glider Network (CUGN)";
String publisher_email "idgdata@ucsd.edu";
String publisher_institution "University of California - San Diego; Scripps Institution of Oceanography";
String publisher_institution_id "https://ror.org/04v7hvq31";
String publisher_name "Instrument Development Group";
String publisher_type "group";
String publisher_url "https://spraydata.ucsd.edu";
String references
"Rudnick, D. L. (2016). Ocean research enabled by underwater gliders. Annual review of marine science, 8, 519-541, doi:10.1146/annurev-marine-122414-033913
Rudnick, D. L., Davis, R. E., & Sherman, J. T. (2016). Spray Underwater Glider Operations. Journal of Atmospheric and Oceanic Technology, 33(6), 1113-1122, doi:10.1175/JTECH-D-15-0252.1
Rudnick, D. L., Davis, R. E., Eriksen, C. C., Fratantoni, D. M., & Perry, M. J. (2004). Underwater gliders for ocean research. Marine Technology Society Journal, 38(2), 73-84, doi:10.4031/002533204787522703
Sherman, J., Davis, R. E., Owens, W. B., & Valdes, J. (2001). The autonomous underwater glider 'Spray'. IEEE Journal of oceanic Engineering, 26(4), 437-446, doi:10.1109/48.972076";
String sea_name "Coastal Waters of California";
String site "CUGN Line 56";
String source "Observational data from a profiling underwater glider.";
String sourceUrl "https://files.platforms.axds.co/sccoos/cugn/binnedCUGN56/binnedCUGN56_processed.nc";
Float64 Southernmost_Northing 36.75746;
String standard_name_vocabulary "CF Standard Name Table v75";
String subsetVariables "mission";
String summary
"California Underwater Glider Network - Line 56. The overarching goal of the California Underwater Glider Network is to sustain baseline observations of climate variability off the coast of California. The technical approach is to deploy autonomous underwater gliders in a network to provide real-time data.
The CUGN uses Spray underwater gliders making repeated dives from the surface to 500 m and back, repeating the cycle every 3 hours, and traveling 3 km in the horizontal during that time. The CUGN includes gliders on three of the traditional cross-shore California Cooperative Oceanic Fisheries Investigations (CalCOFI) lines: line 66.7 off Monterey Bay, line 80 off Point Conception, and line 90 off Dana Point.
The glider missions typically last about 100 days, and cover over 2000 km, thus providing 4-6 sections on lines extending 300-500 km offshore. Since 2005 the CUGN has covered 200,000 km over ground in 28 glider-years, while doing 90,000 dives.";
String time_coverage_duration "P1068DT14H7M0S";
String time_coverage_end "2026-04-27T14:36:08Z";
String time_coverage_resolution "P0DT0H2M48S";
String time_coverage_start "2023-05-25T00:29:08Z";
String title "California Underwater Glider Network (CUGN) - CUGN Line 56 - California Underwater Glider Network - Line 56, Science Quality Binned Data";
Float64 Westernmost_Easting -126.8960425;
}
}
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.