| title: | OMG Ocean AXCTD Level 2 Data |
| summary: | This file contains conductivity, temperature and depth measurements from an AXCTD instrument. In addition, it contains derived variables, salinity, sound speed and density, as computed by a Sippican MK21 receiver. |
| keywords: | Conductivity, Salinity, Water Depth, Water Temperature |
| keywords_vocabulary: | NASA Global Change Master Directory (GCMD) Science Keywords |
| Conventions: | CF-1.6, ACDD-1.3 |
| id: | OMG_Ocean_AXCTD_L2 |
| uuid: | b0a00396-29fd-4069-b6b0-fcdecc532f04 |
| naming_authority: | gov.nasa.jpl |
| cdm_data_type: | Station |
| history: | Transformed input product OMG_09132016152643_Ch16_335.edf into NetCDF format. |
| source: | Temperature and salinity data are collected using air-deployed sensors called Airborne eXpendable Conductivity Temperature Depth (AXCTD) instruments purchased from Lockheed Martin/Sippican, Inc. |
| platform: | Grumman Gulfstream III (G-III) |
| instrument: | Airborne eXpendable Conductivity Temperature Depth (AXCTD) |
| processing_level: | L2 |
| comment: | This data was collected during the 2016 campaign. |
| standard_name_vocabulary: | NetCDF Climate and Forecast (CF) Metadata Convention |
| acknowledgement: | This research was carried out by the Jet Propulsion Laboratory, managed by the California Institute of Technology under a contract with the National Aeronautics and Space Administration. |
| license: | Freely Distributed |
| product_version: | 1.0 |
| references: | DOI:10.5067/OMGEV-AXCT1 |
| creator_name: | Joshua K. Willis |
| creator_email: | Joshua.K.Willis@jpl.nasa.gov |
| creator_url: | https://dx.doi.org/10.5067/OMGEV-AXCT1 |
| creator_type: | Person |
| creator_institution: | NASA Jet Propulsion Laboratory |
| institution: | NASA Jet Propulsion Laboratory |
| project: | Oceans Melting Greenland (OMG) |
| program: | NASA Earth Venture Suborbital-2 (EVS-2) |
| contributor_name: | OMG Science Team |
| contributor_role: | OMG Science Team performed the survey in the field, collected the data and performed the initial processing. |
| publisher_name: | PO.DAAC |
| publisher_email: | podaac@podaac.jpl.nasa.gov |
| publisher_url: | https://dx.doi.org/10.5067/OMGEV-AXCT1 |
| publisher_type: | group |
| publisher_institution: | NASA Jet Propulsion Laboratory |
| geospatial_lat_min: | 64.10706 |
| geospatial_lat_max: | 64.10706 |
| geospatial_lat_units: | degrees north |
| geospatial_lat_resolution: | 0.00001f |
| geospatial_lon_min: | -53.22467 |
| geospatial_lon_max: | -53.22467 |
| geospatial_lon_units: | degrees east |
| geospatial_lon_resolution: | 0.00001f |
| geospatial_vertical_min: | 0.72 |
| geospatial_vertical_max: | 309.7004 |
| geospatial_vertical_resolution: | 0.0001f |
| geospatial_vertical_units: | meters |
| geospatial_vertical_positive: | down |
| time_coverage_start: | 2016-09-13T15:26:43 |
| time_coverage_end: | 2016-09-13T15:41:43 |
| time_coverage_duration: | PT15M |
| date_created: | 2019-07-15T20:42:57 |
| raw_data_filename: | XCTD-01 TSK Air-launched 20160913153943 |
| probe_type: | AXCTD |
| drop_number: | 335 |
| channel: | 16 |
| terminal_depth: | 1000 m |
| depth_equation: | |
| depth_coefficient_1: | 0.72 |
| depth_coefficient_2: | 2.76124 |
| depth_coefficient_3: | -0.000238007 |
| depth_coefficient_4: | 0.0 |
| sequence_number: | 00101 |
| serial_number: | 15126277 |
| mk21_device: | MK21 Ethernet |
| cal_coefficient_state: | Original |
| temperature_coefficient_1: | -9.276940E-02 |
| temperature_coefficient_2: | 9.970650E-01 |
| temperature_coefficient_3: | 0.000000E+00 |
| temperature_coefficient_4: | 0.000000E+00 |
| conductivity_coefficient_1: | -9.016970E-02 |
| conductivity_coefficient_2: | 1.034820E+00 |
| conductivity_coefficient_3: | 0.000000E+00 |
| conductivity_coefficient_4: | 0.000000E+00 |
| coefficient_comment: | Temperature and conductivity coefficients are instrument dependent. The coefficients were used by the Lockheed/Sippican MK21 data acquisition system to calculate depth, temperature and conductivity. |
| Unlimited_Dimension: | obs |
| lat: | Array of 32 bit Reals [profile = 0..0] _FillValue: -9999.00000 long_name: latitude standard_name: latitude units: degrees_north coverage_content_type: coordinate axis: Y valid_max: 90.00000000000000 valid_min: -90.00000000000000 comment: Represents the latitude of the plane position when the probe was deployed which is an estimate of the actual location where the probe hit the surface of the water. |
| lon: | Array of 32 bit Reals [profile = 0..0] _FillValue: -9999.00000 long_name: longitude standard_name: longitude units: degrees_east coverage_content_type: coordinate axis: X valid_max: 180.0000000000000 valid_min: -180.0000000000000 comment: Represents the longitude of the plane position when the probe was deployed which is an estimate of the actual location where the probe hit the surface of the water. |
| time: | Array of 64 bit Reals [profile = 0..0] _FillValue: -9999.000000000000 long_name: time standard_name: time units: seconds since 1970-01-01T00:00:00Z axis: T comment: Represents the time the probe was deployed from the plane. |
| profile_time: | Array of 32 bit Reals [profile = 0..0][obs = 0..2825] _FillValue: -9999.00000 long_name: time since probe began descent from ocean surface units: seconds comment: Represents the time in seconds since the weighted probe was released from the floating buoy. Depth is calculated from this variable based on a standard formula. |
| frame: | Array of Strings [profile = 0..0][obs = 0..2825] long_name: frame coordinates: time lat lon comment: Represents the observed measurement, format unknown. A value of 00000000 indicates no data available. string_length: 8 |
| depth: | Array of 32 bit Reals [profile = 0..0][obs = 0..2825] _FillValue: -9999.00000 long_name: depth standard_name: depth units: meters positive: down coverage_content_type: physicalMeasurement coordinates: time lat lon axis: Z valid_min: 0.000000000000000 valid_max: 5000.000000000000 |
| temperature: | Array of 32 bit Reals [profile = 0..0][obs = 0..2825] _FillValue: -9999.00000 long_name: sea water temperature standard_name: sea_water_temperature units: degrees_C coverage_content_type: physicalMeasurement coordinates: time lat lon depth valid_min: -2.200000000000000 valid_max: 35.00000000000000 |
| conductivity: | Array of 32 bit Reals [profile = 0..0][obs = 0..2825] _FillValue: -9999.00000 long_name: sea water electrical conductivity standard_name: sea_water_electrical_conductivity units: mS cm-1 coverage_content_type: physicalMeasurement coordinates: time lat lon depth valid_min: 0.000000000000000 valid_max: 60.00000000000000 |
| salinity: | Array of 32 bit Reals [profile = 0..0][obs = 0..2825] _FillValue: -9999.00000 long_name: sea water salinity standard_name: sea_water_salinity units: 1e-3 coverage_content_type: physicalMeasurement coordinates: time lat lon depth valid_min: 0.000000000000000 valid_max: 45.00000000000000 |
| sound_velocity: | Array of 32 bit Reals [profile = 0..0][obs = 0..2825] _FillValue: -9999.00000 long_name: speed of sound in sea water standard_name: speed_of_sound_in_sea_water units: m s-1 coverage_content_type: physicalMeasurement coordinates: time lat lon depth valid_min: 1405.000000000000 valid_max: 1560.000000000000 |
| density: | Array of 32 bit Reals [profile = 0..0][obs = 0..2825] _FillValue: -9999.00000 long_name: sea water density standard_name: sea_water_density units: kg m-3 coverage_content_type: physicalMeasurement coordinates: time lat lon depth valid_min: 999.0000000000000 valid_max: 1045.000000000000 |