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Dataset Title: | bios_anna2-20210123T2002 Real Time Science Profiles |
Institution: | Bermuda Institute of Ocean Sciences (Dataset ID: bios_anna2-20210123T2002-profile-sci-rt) |
Information: | Summary | License | FGDC | ISO 19115 | Metadata | Background | Subset | Files | Make a graph |
Attributes { s { time { UInt32 _ChunkSizes 29; String _CoordinateAxisType "Time"; Float64 actual_range 1.611443840188e+9, 1.615956284975e+9; String axis "T"; Int32 bytes 8; String calendar "gregorian"; String comment "Alias for m_present_time"; String ioos_category "Time"; String long_name "m_present_time"; String source_sensor "m_present_time"; String standard_name "time"; String time_origin "01-JAN-1970 00:00:00"; String units "seconds since 1970-01-01T00:00:00Z"; Float64 valid_max 2.147483647e+9; Float64 valid_min 0.0; } latitude { UInt32 _ChunkSizes 29; String _CoordinateAxisType "Lat"; Float64 _FillValue 9.96920996838687e+36; Float64 actual_range 31.295840256921206, 31.859066666666664; String axis "Y"; Int32 bytes 8; String comment "m_gps_lat converted to decimal degrees and interpolated"; String ioos_category "Location"; String long_name "Latitude"; String observation_type "calculated"; Int32 precision 5; String source_sensor "m_gps_lat"; String standard_name "latitude"; String units "degrees_north"; Float64 valid_max 90.0; Float64 valid_min -90.0; } longitude { UInt32 _ChunkSizes 29; String _CoordinateAxisType "Lon"; Float64 _FillValue 9.96920996838687e+36; Float64 actual_range -64.16550137201223, -63.78387922821776; String axis "X"; Int32 bytes 8; String comment "m_gps_lon converted to decimal degrees and interpolated"; String ioos_category "Location"; String long_name "Longitude"; String observation_type "calculated"; Int32 precision 5; String source_sensor "m_gps_lon"; String standard_name "longitude"; String units "degrees_east"; Float64 valid_max 180.0; Float64 valid_min -180.0; } depth { UInt32 _ChunkSizes 29; String _CoordinateAxisType "Height"; String _CoordinateZisPositive "down"; Float32 _FillValue 9.96921e+36; Float32 actual_range 3.306921, 908.5968; String axis "Z"; String comment "Calculated from llat_pressure and llat_latitude using gsw.z_from_p"; String ioos_category "Location"; String long_name "CTD Depth"; String observation_type "calculated"; String positive "down"; String reference_datum "sea-surface"; String source_sensor "llat_pressure,llat_latitude"; String standard_name "depth"; String units "m"; Float32 valid_max 2000.0; Float32 valid_min 0.0; } trajectory { UInt32 _ChunkSizes 23; String cf_role "trajectory_id"; String comment "A trajectory is a single deployment of a glider and may span multiple data files."; String ioos_category "Identifier"; String long_name "Trajectory/Deployment Name"; } profile_id { Float64 _FillValue 9.96920996838687e+36; Float64 actual_range 1.611456009e+9, 1.615867762e+9; String ancillary_variables "profile_time"; String cf_role "profile_id"; String comment "Unique identifier of the profile. The profile ID is the mean profile timestamp"; String ioos_category "Identifier"; String long_name "Profile ID"; Float64 valid_max 2.147483647e+9; Float64 valid_min 1.0; } profile_lat { Float64 _FillValue 9.96920996838687e+36; Float64 actual_range 31.29681715758092, 31.85834732783678; String axis "Y"; String comment "Value is interpolated to provide an estimate of the latitude at the mid-point of the profile"; String ioos_category "Location"; String long_name "Profile Center Latitude"; String observation_type "calculated"; Int32 precision 5; String standard_name "latitude"; String units "degree_north"; Float64 valid_max 90.0; Float64 valid_min -90.0; } profile_lon { Float64 _FillValue 9.96920996838687e+36; Float64 actual_range -64.16345947369946, -63.78778830927423; String axis "X"; String comment "Value is interpolated to provide an estimate of the longitude at the mid-point of the profile"; String ioos_category "Location"; String long_name "Profile Center Longitude"; String observation_type "calculated"; Int32 precision 5; String standard_name "longitude"; String units "degree_east"; Float64 valid_max 180.0; Float64 valid_min -180.0; } source_file { UInt32 _ChunkSizes 37; String all_sensors "0"; String comment "Name of the source data file and associated file metadata"; String dbd_label "DBD_ASC(dinkum_binary_data_ascii)file"; String encoding_ver "2"; Int32 file_size_bytes 53335; String filename "bios_anna2-2021-074-1-4"; String filename_extension "sbd"; String filename_label "bios_anna2-2021-074-1-4-sbd(00130004)"; String fileopen_time "Tue_Mar_16_16:05:07_2021"; String ioos_category "Unknown"; String long_name "Source data file"; String mission_name "1k_n2.mi"; String num_ascii_tags "14"; String num_label_lines "3"; String num_segments "1"; String segment_filename_0 "bios_anna2-2021-074-1-4"; String sensors_per_cycle "86"; String source_file "/home/coolgroup/slocum/deployments/2021/bios_anna2-20210123T2002/data/in/ascii/sbd/bios_anna2_2021_074_1_4_sbd.dat"; String the8x3_filename "00130004"; } platform { Int32 _FillValue -2147483647; String depth_rating "1000m"; String id "bios_anna2"; String instrument "instrument_ctd,instrument_flbbbb,instrument_optode,instrument_suna"; String ioos_category "Unknown"; String long_name "bios_anna2 Slocum G3 glider"; String make_model "Teledyne Webb Research Slocum G3 glider"; String os_version "10.3"; String platform "glider"; String platform_uri "https://vocab.nerc.ac.uk/collection/B76/current/B7600014/"; String platform_vocabulary "https://vocab.nerc.ac.uk/collection/B76/current"; String type "platform"; String wmo_platform_code "4802992"; } instrument_ctd { Int32 _FillValue -2147483647; String calibration_date "2020-01-02"; String comment "Pumped"; String factory_calibrated "2020-01-02"; String instrument_uri "https://vocab.nerc.ac.uk/collection/L22/current/TOOL1492/"; String instrument_vocabulary "https://vocab.nerc.ac.uk/collection/L22/current/"; String ioos_category "Identifier"; String long_name "Conductivity, Temperature, Depth (CTD) Sensor"; String make_model "Sea-Bird GPCTD"; String owner "BIOS"; String platform "platform"; String serial_number "9506"; String type "instrument"; } instrument_flbbbb { Int32 _FillValue -2147483647; String calibration_date "2020-03-03"; String comment "beta532,beta700,Chlorophyll a"; String instrument_uri "https://vocab.nerc.ac.uk/collection/L22/current/TOOL0673/"; String instrument_vocabulary "https://vocab.nerc.ac.uk/collection/L22/current/"; String ioos_category "Identifier"; String long_name "ECO Triplet Puck"; String make_model "Sea-Bird ECO Triplet flbbbbslc"; String owner "BIOS"; String platform "platform"; String serial_number "6175"; String type "instrument"; } instrument_optode { Int32 _FillValue -2147483647; String calibration_date "2020-03-02"; String comment "JFE Advantech Rinko II optode"; String factory_calibrated "2020-03-02"; String instrument_uri "https://vocab.nerc.ac.uk/collection/L22/current/TOOL1590/"; String instrument_vocabulary "https://vocab.nerc.ac.uk/collection/L22/current/"; String ioos_category "Identifier"; String long_name "Oxygen Optode"; String make_model "JFE Advantech Rinko II {ARO-CAR/CAD} oxygen sensor"; String owner "BIOS"; String platform "platform"; String serial_number "1355"; String type "instrument"; } instrument_suna { Int32 _FillValue -2147483647; String calibration_date "2021-01-22"; String factory_calibrated "2021-01-22"; String instrument_uri "https://vocab.nerc.ac.uk/collection/L22/current/TOOL1562/"; String instrument_vocabulary "https://vocab.nerc.ac.uk/collection/L22/current/"; String ioos_category "Identifier"; String long_name "Satlantic SUNA V2 NO3 analyser"; String make_model "Satlantic Submersible Ultraviolet Nitrate Analyser V2 {SUNA V2} nutrient analyser series"; String owner "BIOS"; String platform "platform"; String serial_number "1020"; String type "instrument"; String user_calibrated "2021-01-22"; } beta532 { UInt32 _ChunkSizes 29; Float32 _FillValue 9.96921e+36; Float32 actual_range 7.696e-5, 0.00786916; Int32 bytes 4; String comment "beta532nm"; String instrument "instrument_flbbbb"; String ioos_category "Unknown"; String long_name "sci_flbbbbv1_bb1_scaled"; String sensor "sci_flbbbbv1_bb1_scaled"; String source_sensor "sci_flbbbbv1_bb1_scaled"; String units "m-1 sr-1"; } beta700 { UInt32 _ChunkSizes 29; Float32 _FillValue 9.96921e+36; Float32 actual_range 1.944e-4, 0.010692; Int32 bytes 4; String comment "beta700nm"; String instrument "instrument_flbbbb"; String ioos_category "Optical Properties"; String long_name "sci_flbbbbv1_bb2_scaled"; String sensor "sci_flbbbbv1_bb2_scaled"; String source_sensor "sci_flbbbbv1_bb2_scaled"; String units "m-1 sr-1"; } chlorophyll_a { UInt32 _ChunkSizes 29; Float32 _FillValue 9.96921e+36; Float32 actual_range -0.0438, 0.7811; Int32 bytes 4; String instrument "instrument_flbbbb"; String ioos_category "Ocean Color"; String long_name "sci_flbbbbv1_fl_scaled"; String sensor "sci_flbbbbv1_fl_scaled"; String source_sensor "sci_flbbbbv1_fl_scaled"; String standard_name "mass_concentration_of_chlorophyll_a_in_seawater"; String units "ug L-1"; } conductivity { UInt32 _ChunkSizes 29; Float32 _FillValue 9.96921e+36; Float32 actual_range 3.56102, 5.16503; Int32 bytes 4; String ioos_category "Salinity"; String long_name "Raw Conductivity"; String observation_type "measured"; String source_sensor "sci_water_cond"; String standard_name "sea_water_electrical_conductivity"; String units "S m-1"; Float32 valid_max 10.0; Float32 valid_min 0.0; } crs { Int32 _FillValue -2147483647; String epsg_code "EPSG:4326"; String grid_mapping_name "latitude_longitude"; Float64 inverse_flattening 298.257223563; String ioos_category "Unknown"; String long_name "http://www.opengis.net/def/crs/EPSG/0/4326"; Float64 semi_major_axis 6378137.0; } density { UInt32 _ChunkSizes 29; Float32 _FillValue 9.96921e+36; Float32 actual_range 1025.588, 1031.695; String ancillary_variables "conductivity,temperature,presssure,latitude,longitude"; String ioos_category "Salinity"; String long_name "Density"; String observation_type "calculated"; String standard_name "sea_water_density"; String units "kg m-3"; Float32 valid_max 1015.0; Float32 valid_min 1040.0; } m_pitch { UInt32 _ChunkSizes 29; Float32 _FillValue 9.96921e+36; Float32 actual_range -1.17984, 0.657989; Int32 bytes 4; String ioos_category "Unknown"; String long_name "m_pitch"; String sensor "m_pitch"; String source_sensor "m_pitch"; String type "f4"; String units "rad"; } m_roll { UInt32 _ChunkSizes 29; Float32 _FillValue 9.96921e+36; Float32 actual_range -0.738274, 0.965167; Int32 bytes 4; String ioos_category "Unknown"; String long_name "m_roll"; String sensor "m_roll"; String source_sensor "m_roll"; String type "f4"; String units "rad"; } potential_temperature { UInt32 _ChunkSizes 29; Float32 _FillValue 9.96921e+36; Float32 actual_range 6.68918, 21.41745; String ancillary_variables "salinity,temperature,pressure"; String ioos_category "Salinity"; String long_name "Potential Temperature"; String observation_type "calculated"; String standard_name "sea_water_potential_temperature"; String units "degree_C"; Float32 valid_max 0.0; Float32 valid_min 40.0; } pressure { UInt32 _ChunkSizes 29; Float32 _FillValue 9.96921e+36; Float32 actual_range 3.33, 916.95; String axis "Z"; Int32 bytes 4; String comment "Alias for sci_water_pressure, multiplied by 10 to convert from bar to dbar"; String ioos_category "Pressure"; String long_name "CTD Pressure"; String observation_type "measured"; String positive "down"; String reference_datum "sea-surface"; String source_sensor "sci_water_pressure"; String standard_name "sea_water_pressure"; String units "bar"; Float32 valid_max 2000.0; Float32 valid_min 0.0; } profile_time { Float64 actual_range 1.6114443846107335e+9, 1.615955646339087e+9; String axis "T"; String calendar "gregorian"; String comment "Timestamp corresponding to the mid-point of the profile"; String ioos_category "Time"; String long_name "Profile Center Time"; String observation_type "calculated"; String standard_name "time"; String time_origin "01-JAN-1970 00:00:00"; String units "seconds since 1970-01-01T00:00:00Z"; Float64 valid_max 2.147483647e+9; Float64 valid_min 0.0; } salinity { UInt32 _ChunkSizes 29; Float32 _FillValue 9.96921e+36; Float32 actual_range 35.1193, 36.7938; String ancillary_variables "conductivity,temperature,presssure"; String ioos_category "Salinity"; String long_name "Practical Salinity"; String observation_type "calculated"; String standard_name "sea_water_practical_salinity"; String units "1"; Float32 valid_max 0.0; Float32 valid_min 40.0; } sci_m_disk_free { UInt32 _ChunkSizes 29; Float32 _FillValue 9.96921e+36; Float32 actual_range 7508.45, 7857.25; Int32 bytes 4; String ioos_category "Unknown"; String long_name "sci_m_disk_free"; String sensor "sci_m_disk_free"; String source_sensor "sci_m_disk_free"; String type "f4"; String units "Mbytes"; } sci_m_present_time { UInt32 _ChunkSizes 29; Float64 actual_range 1.611443840188e+9, 1.615956284975e+9; String axis "T"; Int32 bytes 8; String calendar "gregorian"; String ioos_category "Time"; String long_name "sci_m_present_time"; String source_sensor "sci_m_present_time"; String standard_name "time"; String time_origin "01-JAN-1970 00:00:00"; String units "seconds since 1970-01-01T00:00:00Z"; Float64 valid_max 2.147483647e+9; Float64 valid_min 0.0; } sci_rinkoii_do { UInt32 _ChunkSizes 29; Float32 _FillValue 9.96921e+36; Float32 actual_range 48.464, 133.475; Int32 bytes 4; String ioos_category "Dissolved O2"; String long_name "sci_rinkoii_do"; String sensor "sci_rinkoii_do"; String source_sensor "sci_rinkoii_do"; String type "f4"; String units "%"; } sci_rinkoii_temp { UInt32 _ChunkSizes 29; Float32 _FillValue 9.96921e+36; Float32 actual_range 6.762, 21.43; Int32 bytes 4; String ioos_category "Temperature"; String long_name "sci_rinkoii_temp"; String sensor "sci_rinkoii_temp"; String source_sensor "sci_rinkoii_temp"; String type "f4"; String units "degc"; } sci_water_pressure { UInt32 _ChunkSizes 29; Float32 _FillValue 9.96921e+36; Float32 actual_range 0.333, 91.695; String axis "Z"; Int32 bytes 4; String ioos_category "Pressure"; String long_name "CTD Pressure"; String observation_type "measured"; String positive "down"; String reference_datum "sea-surface"; String source_sensor "sci_water_pressure"; String standard_name "sea_water_pressure"; String units "bar"; Float32 valid_max 2000.0; Float32 valid_min 0.0; } sound_speed { UInt32 _ChunkSizes 29; Float32 _FillValue 9.96921e+36; Float32 actual_range 1492.686, 1529.17; String ancillary_variables "conductivity,temperature,presssure,latitude,longitude"; String ioos_category "Currents"; String long_name "Sound Velocity"; String observation_type "calculated"; String standard_name "speed_of_sound_in_sea_water"; String units "m s-1"; Float32 valid_max 1460.0; Float32 valid_min 1560.0; } temperature { UInt32 _ChunkSizes 29; Float32 _FillValue 9.96921e+36; Float32 actual_range 6.7771, 21.436; Int32 bytes 4; String ioos_category "Temperature"; String long_name "Raw Temperature"; String observation_type "measured"; String source_sensor "sci_water_temp"; String standard_name "sea_water_temperature"; String units "degrees_C"; Float32 valid_max 40.0; Float32 valid_min -5.0; } u { UInt32 _ChunkSizes 1024; Float32 _FillValue 9.96921e+36; Float32 actual_range -0.22491, 0.0675959; Int32 bytes 4; String ioos_category "Currents"; String long_name "Eastward Current"; String observation_type "calculated"; String sensor "m_final_water_vx"; String source_sensor "m_final_water_vx"; String standard_name "eastward_sea_water_velocity"; String type "f4"; String units "m s-1"; } v { UInt32 _ChunkSizes 29; Float32 _FillValue 9.96921e+36; Float32 actual_range -0.45894, 0.0928871; Int32 bytes 4; String ioos_category "Currents"; String long_name "Northward Current"; String observation_type "calculated"; String sensor "m_final_water_vy"; String source_sensor "m_final_water_vy"; String standard_name "northward_sea_water_velocity"; String type "f4"; String units "m s-1"; } water_depth { UInt32 _ChunkSizes 29; Float32 _FillValue 9.96921e+36; Float32 actual_range -1.0, -1.0; Int32 bytes 4; String comment "CTD depth plus altitude off the bottom"; String ioos_category "Bathymetry"; String long_name "m_water_depth"; String sensor "m_water_depth"; String source_sensor "m_water_depth"; String standard_name "sea_floor_depth_below_sea_surface"; String type "f4"; String units "m"; } } NC_GLOBAL { String _NCProperties "version=1|netcdflibversion=4.6.1|hdf5libversion=1.10.3"; String acknowledgement "This deployment supported by The Simons Foundation International"; String cdm_data_type "TrajectoryProfile"; String cdm_profile_variables "profile_id"; String cdm_trajectory_variables "trajectory"; String comment "Deployed by and Cordielyn Goodrich on R/V Atlantic Explorer for the Glider Exports Experiment"; String contributor_name "Ruth Curry,Cordielyn Goodrich"; String contributor_role "Principal Investigator,Glider Technician"; String Conventions "CF-1.6, COARDS, ACDD-1.3"; String creator_email "kerfoot@marine.rutgers.edu"; String creator_institution "Rutgers University"; String creator_name "John Kerfoot"; String creator_type "person"; String creator_url "https://rucool.marine.rutgers.edu"; String date_created "2021-03-17T12:35:08Z"; String date_issued "2021-03-17T12:35:08Z"; String date_modified "2021-03-17T12:35:08Z"; String defaultGraphQuery "temperature,depth,time&time>=max(time)-1days&temperature!=NaN&.draw=markers&.marker=6%7C3&.color=0xFFFFFF&.colorBar=Rainbow2%7C%7C%7C%7C%7C&.bgColor=0xffccccff&.yRange=%7C%7Cfalse"; String deployment_name "bios_anna2-20210123T200"; Float64 Easternmost_Easting -63.78387922821776; String featureType "TrajectoryProfile"; String geospatial_bounds "POLYGON ((31.80217494769611 -64.02776186106293, 31.80217494769611 -64.02627730001701, 31.80066138817073 -64.02627730001701, 31.80066138817073 -64.02776186106293, 31.80217494769611 -64.02776186106293))"; String geospatial_bounds_crs "EPSG:4326"; String geospatial_bounds_vertical_crs "EPSG:5831"; Float64 geospatial_lat_max 31.859066666666664; Float64 geospatial_lat_min 31.295840256921206; String geospatial_lat_resolution "0.00001 degree"; String geospatial_lat_units "degrees_north"; Float64 geospatial_lon_max -63.78387922821776; Float64 geospatial_lon_min -64.16550137201223; String geospatial_lon_resolution "0.00001 degree"; String geospatial_lon_units "degrees_east"; Int32 geospatial_verical_resolution 6; Float64 geospatial_vertical_max 908.5968; Float64 geospatial_vertical_min 3.306921; String geospatial_vertical_positive "down"; String geospatial_vertical_units "m"; String history "2021-03-17T12:35:08Z: /tmp/tmp9nxmya0i/bios_anna2_20210316T164024Z_sbdiif12jb0.nc created 2021-03-17T12:35:08Z: /home/kerfoot/code/glider-proc/scripts/proc_deployment_profiles_to_nc.py /home/coolgroup/slocum/deployments/2021/bios_anna2-20210123T2002/data/in/ascii/sbd/bios_anna2_2021_074_1_4_sbd.dat 2024-11-21T08:59:33Z (local files) 2024-11-21T08:59:33Z http://slocum-data.marine.rutgers.edu/erddap/tabledap/bios_anna2-20210123T2002-profile-sci-rt.html"; String id "bios_anna2-20210123T200"; String infoUrl "https://rucool.marine.rutgers.edu"; String institution "Bermuda Institute of Ocean Sciences"; String instrument "In Situ/Laboratory Instruments > Profilers/Sounders > CTD"; String instrument_vocabulary "NASA/GCMD Instrument Keywords Version 8.5"; String keywords_vocabulary "NASA/GCMD Earth Sciences Keywords Version 8.5"; String license "This data may be redistributed and used without restriction. Data provided as is with no expressed or implied assurance of quality assurance or quality control"; String naming_authority "edu.rutgers.rucool"; String ncei_template_version "NCEI_NetCDF_Trajectory_Template_v2.0"; Float64 Northernmost_Northing 31.859066666666664; String platform "In Situ Ocean-based Platforms > AUVS > Autonomous Underwater Vehicles"; String platform_type "Slocum Glider"; String platform_vocabulary "NASA/GCMD Platforms Keywords Version 8.5"; String processing_level "Raw Slocum glider dataset from the native data file format. No quality control provided. Real-time decimated dataset."; String product_version "1.0"; String program "MAGIC: Mid Atlantic Glider Initiative and Collaboration"; String project "MAGIC: Mid Atlantic Glider Initiative and Collaboration"; String publisher_email "kerfoot@marine.rutgers.edu"; String publisher_institution "Rutgers University"; String references "https://ioos.noaa.gov/wp-content/uploads/2015/10/Manual-for-QC-of-Glider-Data_05_09_16.pdf"; String sea_name "Northwest Atlantic Ocean"; String source "Observational Slocum glider data from source dba file bios_anna2-2021-074-1-4-sbd(00130004)"; String sourceUrl "(local files)"; Float64 Southernmost_Northing 31.295840256921206; String standard_name_vocabulary "CF Standard Name Table v27"; String subsetVariables "source_file, profile_id, profile_lat, profile_lon, profile_time"; String summary "Continuation of bios_anna-20190910T1222 deployment. The glider was pulled out of the water and strapped to the ship's CTD rosette for calibration. It was redeployed 2 days later when the R/V Atlantic Explorer returned to the site. The glider is measuring physical and biogeochemical properties in a 1km patch of ocean to quantify daily rates of nitrate delivery and uptake, oxygen production and utilization, and particle exports near the Bermuda Atlantic Time Series (BATS) site. The Mid-Atlantic Glider Initiative and Collaboration (MAGIC) was launched at BIOS in 2014 to enhance and leverage BIOS’s long-standing ocean measurement programs southeast of Bermuda through the use of autonomous underwater vehicles. The overarching goal of MAGIC is to acquire new high-resolution measurements from underwater gliders to assess the contribution of small-scale processes that sustain the ocean’s biological productivity, and to make those assessments over several years to build a statistically meaningful understanding of them. This real-time dataset contains temperature, salinity, chlorophyll a, optical backscatter, oxygen and dissolved nitrate measurements."; String time_coverage_duration "PT22M14.033S"; String time_coverage_end "2021-03-17T04:44:44Z"; String time_coverage_resolution "PT46S"; String time_coverage_start "2021-01-23T23:17:20Z"; String title "bios_anna2-20210123T2002 Real Time Science Profiles"; String uuid "e933de33-7004-412d-ab45-2deee3db6c09"; Float64 Westernmost_Easting -64.16550137201223; String wmo_platform_code "4802992"; } }
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.