Airborne-deployed ocean sensors in the Southern Ocean, 2016-2018, Level 2 data
Extracted Level 2 data include three data types:
1) Position data are included in .GPX files organized by campaign where “ICP8” refers to the 2016-2017 ICECAP2 field season and “ICP9” refers to the 2017-2018 field season. We recommend opening these files in QGIS or on similar platform. Metadata for each sonobuoy deployment include the unique identifier for each profile as well as the date, time, and aircraft longitude, latitude, elevation, and speed (in East, North, Up coordinates) at the time of deployment. Season identifier, flight number, and unique profile identifier are also displayed. In QGIS, for example, clicking on the drop locations using the “Identify Features” tool is a convenient way of investigating the metadata.
2) Profile data are released as Exportable Data Files (EDF), an ASCII format with a metadata header followed by the profile data.
3) Profile data are also released as Hierarchical Data Format (HDF) files using a .h5 extension. This format is provided so users can take advantage of numerous and freely available Python and MATLAB resources simplifying importing and investigating the profiles.
Project 4346 demonstrated the use of Airborne eXpendable Bathy-Thermograph (AXBT) and Airborne eXpendable Conductivity, Temperature, Depth (AXCTD) sensors from a BT-67 Basler aircraft in East Antarctica. The primary objective was to use AXBT and AXCTD sensors to infer seafloor depth where no previous measurements had been made by ship, often by deploying sensors into narrow gaps in sea ice. Inferring a snapshot of the ocean state by detecting major thermoclines was a secondary objective.
Although several sensors were purchased with external funds, the efforts to develop operational and subsequent data analysis approaches were unfunded as this was an add-on, target of opportunity. The effort is best described as a prototype demonstration project to test whether the seafloor depth could be inferred beneath narrow sea ice leads from a rapidly flying aircraft. All but eight AXBT sensors were donated to the University of Texas Institute for Geophysics (UTIG); AXCTDs were purchased by the Antarctic Gateway Partnership. Receiver and data processing equipment were loaned to UTIG.
Simple
Identification info
- Alternate title
- Airborne-deployed ocean sensors in the Southern Ocean, 2016-2018, Level 2 data
- Date (Publication)
- 2021-10-01
- Edition
- 1
- Citation identifier
-
Dataset DOI
- Title
- Information and documentation - Digital object identifier system
- Date (Publication)
- 2012-04-23
- Citation identifier
- ISO 26324:2012
- Citation identifier
- doi:10.26179/5f7t-kv36
Originator
Publisher
Principal investigator
Principal investigator
Principal investigator
Principal investigator
Principal investigator
Principal investigator
Collaborator
Collaborator
Collaborator
Collaborator
Collaborator
Collaborator
Collaborator
- Name
- CAASM Metadata
- Other citation details
- Unreleased data
- Status
- Completed
Custodian
- Topic category
-
- Oceans
Extent
Extent
- Description
- Temporal Coverage
Temporal extent
- TimePeriod
- 2016-10-01 2018-03-31
- NASA/GCMD Earth Science Keywords
-
- EARTH SCIENCE > OCEANS > SALINITY/DENSITY > CONDUCTIVITY
- EARTH SCIENCE > OCEANS > OCEAN TEMPERATURE > WATER TEMPERATURE
- EARTH SCIENCE > OCEANS > OCEAN PRESSURE > WATER PRESSURE
- EARTH SCIENCE > OCEANS > OCEAN TEMPERATURE > THERMOCLINE
- EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > WATER DEPTH
- EARTH SCIENCE > OCEANS > SEA ICE
- Keywords
-
- AXCTD
- AIRBORNE EXPENDABLE BATHY-THERMOGRAPH
- AXBT
- AIRBORNE EXPENDABLE CONDUCTIVITY, TEMPERATURE, DEPTH
- NASA/GCMD Earth Science Keywords
-
- XBT > Expendable Bathythermographs
- CTD > Conductivity Temperature Depth
- SONOBUOYS
- NASA/GCMD Earth Science Keywords
-
- AIRCRAFT
- BT-67 > Basler BT-67
- NASA/GCMD Earth Science Keywords
-
- AMD/AU
- AMD
- CEOS
- NASA/GCMD Earth Science Keywords
-
- OCEAN > SOUTHERN OCEAN
- CONTINENT > ANTARCTICA
- GEOGRAPHIC REGION > POLAR
Resource constraints
- Use limitation
- This metadata record is publicly available.
Resource constraints
- Access constraints
- licence
- Other constraints
- These data are not yet publicly available.
Resource constraints
- File type
- Portable Network Graphic
- Title
- Attribution 4.0 International (CC BY 4.0)
- Website
-
https://creativecommons.org/licenses/by/4.0/legalcode
Legal code for Creative Commons by Attribution 4.0 International license
- Use constraints
- licence
- Other constraints
- This data set conforms to the CCBY Attribution License (http://creativecommons.org/licenses/by/4.0/). Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=AAS_4346_Airborne_Ocean_Sensors_Level_2 when using these data.
- Language
- English
- Character encoding
- UTF8
Distribution Information
Distributor
Distributor
Distributor
- Fees
- Free
- Planned available datetime
- 2021-10-01T00:00:00
- Units of distribution
- MB
- Transfer size
- 36
- Distribution format
-
- Text
- OnLine resource
-
GET DATA > DIRECT DOWNLOAD
Download the dataset.
- OnLine resource
-
PROJECT HOME PAGE
Public information for AAS project AAS_4346
- OnLine resource
-
VIEW RELATED INFORMATION
Citation reference for this metadata record and dataset.
Resource lineage
- Statement
- The vast majority of AXBT and AXCTD sensors successfully transmitted signals to the aircraft; however, a handful of sensors either did not transmit or transmitted noisy and likely uninterpretable data. An ongoing analysis effort attempts to increase confidence in the seafloor impact signal and the proper equations to use for depth, temperature, and salinity calculations. Updates to this metadata record will be submitted when improvements in data quality are achieved. Dates provided in temporal coverage are approximate only.
- Hierarchy level
- Dataset
- Maintenance and update frequency
- As needed
- Maintenance note
- 2020-08-12 - record created by Dave Connell from a template provided by Jamin Greenbaum.
Metadata
- Metadata identifier
- string/AAS_4346_Airborne_Ocean_Sensors_Level_2
- Language
- English
- Character encoding
- UTF8
Author
Sponsor
Owner
Type of resource
- Resource scope
- Dataset
Alternative metadata reference
- Title
- gov.nasa.gsfc.gcmd
- Citation identifier
- 0ae923bd-a0e8-4c14-84c8-779f4b332740
Alternative metadata reference
- Title
- gov.nasa.gsfc.gcmd
- Date (Last Revision)
- 2020-08-17T00:06:39
Identifier
- Description
- metadata.extraction_date
Alternative metadata reference
- Title
- gov.nasa.gsfc.gcmd
- Citation identifier
- 8.6
- Metadata linkage
-
http://data.aad.gov.au/metadata/records/AAS_4346_Airborne_Ocean_Sensors_Level_2
Point of truth for the metadata record
- Date info (Creation)
- 2020-08-12T00:00:00
- Date info (Last Update)
- 2020-08-17
Metadata standard
- Title
- ISO 19115-3
- Edition
- 2014
- Other citation details
- Version 1
- Title
- DIF to ISO 19115-1 Profile