Easier access to scientific data
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ERDDAP
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Brought to you by NOAA NMFS SWFSC ERD |
| Dataset Title: | ru28-20220520T1425 AZFP Fish Biomass
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| Institution: | Rutgers University (Dataset ID: ru28-20220520T1425_azfp_fish) |
| Range: | longitude = -74.6113 to -74.0669°E, latitude = 38.8081 to 39.3256°N, depth = 3.4812 to 39.38108m, time = 2022-05-21T00:01:38Z to 2022-06-10T14:05:47Z |
| Information: | Summary
| License
| FGDC
| ISO 19115
| Metadata
| Background
| Subset
| Data Access Form
| Files
|
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![[The graph you specified. Please be patient.]](https://rowlrs-data.marine.rutgers.edu/erddap/tabledap/ru28-20220520T1425_azfp_fish.png?longitude,latitude,obs&time%3E=2022-06-04T00%3A00%3A00Z&time%3C=2022-06-11T00%3A00%3A00Z&.draw=markers&.marker=5%7C5&.color=0x000000&.colorBar=%7C%7C%7C%7C%7C&.bgColor=0xffccccff)
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Attributes {
s {
obs {
Int32 _FillValue 2147483647;
Int32 actual_range 3, 39;
String ioos_category "Unknown";
String long_name "Obs";
}
Depth_mean {
Float32 _FillValue NaN;
Float32 actual_range 3.4812, 39.38108;
Float64 colorBarMaximum 8000.0;
Float64 colorBarMinimum -8000.0;
String colorBarPalette "TopographyDepth";
String comment "Average depth of the cell being analyzed (m); derived from the depth of each ping in the cell being analyzed. Same as depth coordinate variable.";
String ioos_category "Location";
String long_name "average depth of acoustic measurement cell";
String positive "down";
String standard_name "depth";
String units "m";
}
Layer_depth_min {
Float32 _FillValue NaN;
Float32 actual_range 3.0, 39.0;
Float64 colorBarMaximum 8000.0;
Float64 colorBarMinimum -8000.0;
String colorBarPalette "TopographyDepth";
String comment "Minimum depth of the cell being analyzed (m)";
String ioos_category "Location";
String long_name "minimum depth of layer";
String positive "down";
String standard_name "depth";
String units "m";
}
Layer_depth_max {
Float32 _FillValue NaN;
Float32 actual_range 4.0, 40.0;
Float64 colorBarMaximum 8000.0;
Float64 colorBarMinimum -8000.0;
String colorBarPalette "TopographyDepth";
String comment "Maximum depth of the cell being analyzed (m)";
String ioos_category "Location";
String long_name "maximum depth of layer";
String positive "down";
String standard_name "depth";
String units "m";
}
profile_id {
Int32 _FillValue 2147483647;
Int32 actual_range 0, 1784;
String cf_role "profile_id";
String comment "Unique identifier for each profile (vertical measurement set at a given time/location)";
String ioos_category "Identifier";
String long_name "profile identifier";
}
Sv_mean {
Float32 _FillValue -999.0;
Float32 actual_range -122.2573, -39.24947;
String comment "Averaged Sv for the cell being analyzed";
String ioos_category "Statistics";
String long_name "mean volume backscattering strength";
String standard_name "volume_backscattering_coefficient";
String units "dB";
}
NASC {
Float32 _FillValue -999.0;
Float32 actual_range 1.9e-5, 1817.867;
String comment "Nautical Area Scattering Coefficient for the cell being analyzed";
String ioos_category "Unknown";
String long_name "nautical area scattering coefficient";
String units "m2 nmi-2";
}
ABC {
Float32 _FillValue -999.0;
Float32 actual_range 4.5e-13, 4.217649e-5;
String comment "Area backscattering coefficient for the cell being analyzed";
String ioos_category "Unknown";
String long_name "area backscattering coefficient";
String units "m2 m-2";
}
Area_Backscatter_Strength {
Float32 _FillValue -999.0;
Float32 actual_range -123.5057, -43.74929;
String comment "Logarithm of ABC for the cell being analyzed";
String ioos_category "Unknown";
String long_name "area backscatter strength";
String units "dB";
}
Standard_deviation {
Float32 _FillValue -999.0;
Float32 actual_range 0.0, 8.979334e-5;
Float64 colorBarMaximum 0.1;
Float64 colorBarMinimum 0.0;
String comment "Standard deviation of Sv, calculated in the linear domain";
String ioos_category "Statistics";
String long_name "standard deviation of volume backscattering strength";
String units "1";
}
Thickness_mean {
Float32 _FillValue -999.0;
Float32 actual_range 0.006974, 0.997219;
String comment "Average height (or thickness) of the cell being analyzed (m)";
String ioos_category "Statistics";
String long_name "average thickness of acoustic measurement cell";
String units "m";
}
Frequency {
Float32 _FillValue NaN;
Float32 actual_range 38.0, 200.0;
String comment "Echosounder frequency";
String ioos_category "Unknown";
String long_name "echosounder frequency";
String standard_name "sound_frequency";
String units "kHz";
}
Difference {
Float32 _FillValue -999.0;
Float32 actual_range -46.5673, 38.05819;
Float64 colorBarMaximum 10.0;
Float64 colorBarMinimum -10.0;
String comment "Difference in Sv between two frequencies; for three-frequency echosounder: when frequency is 38, difference is 200-38; when frequency is 125, difference is 125-38; when frequency is 200, difference is 200-125. For four-frequency echosounder: when frequency is 120, no differences calculated; when frequency is 200, difference is 200-120; when frequency is 455, difference is 455-200; when frequency is 769, difference is 769-455";
String ioos_category "Unknown";
String long_name "difference in Sv between two frequencies";
String units "dB";
}
Exclude_below_line_depth_mean {
Float32 _FillValue -9999.0;
Float32 actual_range 10.50088, 39.17181;
Float64 colorBarMaximum 8000.0;
Float64 colorBarMinimum -8000.0;
String colorBarPalette "TopographyDepth";
String comment "Mean depth of the seafloor in the cell being analyzed, measured from the sea surface";
String ioos_category "Location";
String long_name "mean depth of seafloor";
String positive "down";
String standard_name "depth";
String units "m";
}
Ping_S {
Int32 _FillValue 2147483647;
Int32 actual_range 0, 21467;
Float64 colorBarMaximum 100.0;
Float64 colorBarMinimum 0.0;
String ioos_category "Statistics";
String long_name "ping number at start of measurement cell";
String units "1";
}
Ping_E {
Int32 _FillValue 2147483647;
Int32 actual_range 16, 21574;
Float64 colorBarMaximum 100.0;
Float64 colorBarMinimum 0.0;
String ioos_category "Statistics";
String long_name "ping number at end of measurement cell";
String units "1";
}
Dist_M {
Float32 _FillValue NaN;
Float32 actual_range 7.083925, 262.7449;
String comment "Mean distance from the start of the deployment to the cell being analyzed";
String ioos_category "Statistics";
String long_name "mean distance from deployment start";
String units "nmi";
}
Species {
String comment "Species classification based on acoustic signatures and biological tow data; classifications include broader separations (swimbladder-bearing vs swimbladderless) and specific species identifications based on known species presence in the area";
String ioos_category "Taxonomy";
String long_name "identified or classified species or taxonomic group";
}
time {
String _CoordinateAxisType "Time";
Float64 actual_range 1.65309129832e+9, 1.65486994791e+9;
String axis "T";
String calendar "gregorian";
String ioos_category "Time";
String long_name "time of measurement";
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 _FillValue NaN;
Float32 actual_range 38.8081, 39.3256;
String axis "Y";
Float64 colorBarMaximum 90.0;
Float64 colorBarMinimum -90.0;
String ioos_category "Location";
String long_name "latitude of measurement";
String standard_name "latitude";
String units "degrees_north";
Float32 valid_max 90.0;
Float32 valid_min -90.0;
}
longitude {
String _CoordinateAxisType "Lon";
Float32 _FillValue NaN;
Float32 actual_range -74.6113, -74.0669;
String axis "X";
Float64 colorBarMaximum 180.0;
Float64 colorBarMinimum -180.0;
String ioos_category "Location";
String long_name "longitude of measurement";
String standard_name "longitude";
String units "degrees_east";
Float32 valid_max 180.0;
Float32 valid_min -180.0;
}
depth {
String _CoordinateAxisType "Height";
String _CoordinateZisPositive "down";
Float32 _FillValue NaN;
Float32 actual_range 3.4812, 39.38108;
String ancillary_variables "Layer_depth_min Layer_depth_max";
String axis "Z";
Float64 colorBarMaximum 8000.0;
Float64 colorBarMinimum -8000.0;
String colorBarPalette "TopographyDepth";
String comment "Derived from the depth of each ping in the cell being analyzed. Also available as Depth_mean.";
String ioos_category "Location";
String long_name "average depth of acoustic measurement cell";
String positive "down";
String standard_name "depth";
String units "m";
Float32 valid_min 0.0;
}
platform {
Float64 _FillValue 9223372036854775807;
Float64 actual_range 1, 1;
String glider_type "Teledyne Webb Research Slocum G2 glider";
String id "ru28";
String ioos_category "Unknown";
String long_name "Slocum Glider ru28";
Float64 os_version 8.3;
Float64 wmo_platform_code 4801925;
}
instrument_azfp {
Float64 _FillValue 9223372036854775807;
Float64 actual_range 1, 1;
String calibration_date "2017-10-24";
String comment "AZFP Echosounder configured for fish detections (38, 125, 200 kHz)";
String ioos_category "Unknown";
String long_name "Instrument Azfp";
String make_model "ASL AZFP-M";
String owner "Rutgers University";
String references "https://aslenv.com/brochures/AZFP-Glider_AUV.pdf, https://aslenv.com/assets/files/AZFP.pdf";
Float64 serial_number 59006;
}
trajectory_id {
String cf_role "trajectory_id";
String ioos_category "Identifier";
String long_name "Trajectory/Deployment Name";
}
}
NC_GLOBAL {
String acknowledgement "This deployment is supported by funding from Ocean Wind LLC";
String cdm_data_type "TrajectoryProfile";
String cdm_profile_variables "profile_id";
String cdm_trajectory_variables "trajectory_id";
String contributor_name "Josh Kohut, Grace Saba, Thomas Grothues, Kaycee Coleman, Nicole Waite, David Aragon, Brian Buckingham, Chip Haldeman, John Kerfoot, Laura Nazzaro, Lori Garzio, Timothy Stolarz, Delphine Mossman";
String contributor_role "Principal Investigator, Principal Investigator, Principal Investigator, Project Manager, Pilot, Pilot, Pilot, Pilot, Data Management, Data Management, Data Management, Data Management, AZFP Analyst";
String Conventions "CF-1.10, ACDD-1.3, IOOS-1.2, COARDS";
String creator_email "ecosystemdata at marine.rutgers.edu";
String creator_institution "Rutgers University";
String creator_name "Rutgers Center for Ocean Observing Leadership Ecosystem Data Team";
String creator_type "group";
String creator_url "https://rucool.marine.rutgers.edu/";
String date_created "2025-12-12T16:35:06.408802Z";
String date_issued "2025-12-12T16:35:06.408802Z";
String date_metadata_modified "2025-12-19";
String date_modified "2025-12-19";
Float64 Easternmost_Easting -74.0669;
String featureType "TrajectoryProfile";
Float64 geospatial_lat_max 39.3256;
Float64 geospatial_lat_min 38.8081;
String geospatial_lat_units "degrees_north";
Float64 geospatial_lon_max -74.0669;
Float64 geospatial_lon_min -74.6113;
String geospatial_lon_units "degrees_east";
Float64 geospatial_vertical_max 39.38108;
Float64 geospatial_vertical_min 3.4812;
String geospatial_vertical_positive "down";
String geospatial_vertical_units "m";
String history
"2025-12-12T16:35:06.408802Z - Created from CSV files using Python netCDF4 library
2025-12-24T20:02:30Z (local files)
2025-12-24T20:02:30Z https://rowlrs-data.marine.rutgers.edu/tabledap/ru28-20220520T1425_azfp_fish.das";
String id "ru28-20220520T1425_azfp_fish";
String infoUrl "https://rucool.marine.rutgers.edu/";
String institution "Rutgers University";
String instrument "AZFP";
String instrument_vocabulary "https://vocab.nerc.ac.uk/collection/L05/current/";
String keywords "20220520t1425, ABC, acoustic, acoustics, area, Area_Backscatter_Strength, average, azfp, backscatter, backscattering, between, biomass, cell, classified, coefficient, conductivity, ctd, data, deployment, depth, Depth_mean, deviation, difference, Dist_M, distance, earth, Earth Science > Oceans > Ocean Acoustics > Acoustic Frequency, echosounder, end, Exclude_below_line_depth_mean, fish, frequencies, frequency, glider, group, identified, identifier, instrument, instrument_azfp, latitude, layer, Layer_depth_max, Layer_depth_min, longitude, maximum, mean, measurement, minimum, name, NASC, nautical, number, obs, observations, ocean, oceans, ping, Ping_E, Ping_S, platform, profile, profile_id, ru28, ru28-20220520t1425, rutgers, scattering, science, seafloor, slocum, sonde, sound, sound_frequency, species, standard, Standard_deviation, start, statistics, strength, Sv_mean, taxonomic, taxonomy, temperature, thickness, Thickness_mean, time, trajectory, trajectory/deployment, trajectory_id, two, university, volume, volume_backscattering_coefficient";
String keywords_vocabulary "GCMD Science Keywords";
String license "This data may be redistributed and used without restriction.";
String naming_authority "edu.rutgers.marine";
Float64 Northernmost_Northing 39.3256;
String platform "ru28";
String platform_vocabulary "https://vocab.nerc.ac.uk/collection/L06/current/";
String processing_level "Raw AZFP echosounder data processed using Echoview with a vertical bin of 1m and a horizontal bin of 0.1 nmi.";
String program "Ocean Wind 01 Fisheries Monitoring Plan";
String project "Ocean Wind 01 Fisheries Monitoring Plan, Glider-Based Sampling";
String publisher_email "ecosystemdata at marine.rutgers.edu";
String publisher_institution "Rutgers University";
String publisher_name "Rutgers Center for Ocean Observing Leadership Ecosystem Data Team";
String publisher_type "group";
String publisher_url "https://rucool.marine.rutgers.edu/";
String sea_name "Mid-Atlantic Bight";
String sourceUrl "(local files)";
Float64 Southernmost_Northing 38.8081;
String standard_name_vocabulary "CF Standard Name Table v84";
String subsetVariables "platform, instrument_azfp, trajectory_id";
String summary "This project provides monitoring of key fish species and habitat features within the planned Ocean Wind site and a nearby control site off the coast of southern New Jersey before, during, and after wind farm construction. This glider is equipped with an Acoustic Zooplankton Fish Profiler (AZFP), an autonomous, low-power echo sounder that possesses the capabilities to study the abundance, distribution, and behavior of various sizes of fishes and large zooplankton throughout the water column over large spatial scales by measuring acoustic backscatter returns with ultrasonic frequencies. This 3-4 week deployment will test the use of gliders for conducting fisheries and ecosystem surveys in and around the Ocean Wind study site. The AZFP used on this deployment is configured for fish detections (38, 120, and 200 kHz) and this dataset contains the AZFP data analysis output from Echoview. Environmental data from this deployment, including Conductivity, Temperature, Depth (CTD) data and fluorescence data (ie chlorophyll) is available separately on slocum-data.marine.rutgers.edu.";
String time_coverage_end "2022-06-10T14:05:47Z";
String time_coverage_start "2022-05-21T00:01:38Z";
String title "ru28-20220520T1425 AZFP Fish Biomass";
Float64 Westernmost_Easting -74.6113;
}
}
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.