From Australian Oceans Data Network
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A comparison of sea-ice thickness measurements made using ship-mounted and airborne electromagnetic induction devices

Created 23/06/2025

Updated 23/06/2025

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Metadata record for data from ASAC Project 1342 See the link below for public details on this project. ---- Public Summary from Project ---- This project involves field trialling of software written as part of ASAC project 1212 (2000-2001) to determine sea-ice thickness in real-time from ship-borne electromagnetic induction measurements. Computer simulation of ship- and helicopter-borne electromagnetic induction measurements over realistic sea-ice structures will also be performed in order to assess the suitability and cost-effectiveness of helicopter-mounted systems for future Antarctic sea-ice thickness measurements. Equipment used in this study were the IBEO PS100 infrared laser altimeter and the Geonics EM31 geophysical electromagnetic induction device. The fields in this dataset are: DAY is Julian day TIME is in seconds after midnight (UTC). LASER is the laser altitude above the snow/ice (metres). A zero reading indicates no return (open water). PITCH is pitch of the system in degrees. ROLL is roll of the system in degrees. COND-A is analogue conductivity from the EM31 (not used). PHASE-A is analogue in-phase response from the EM31 (not used). COND is the estimated depth to seawater (metres) from the EM31-ICE processing module. PHASE is the EM31 in-phase response (expressed as parts per thousand of the primary field). A value of 9.99 indicates the magnetic field was too large to be recorded. SITE LATITUDE LONGITUDE SNOW THICKNESS ICE THICKNESS FREEBOARD a is the electrode spacing. R is the measured resistance. Rho is the apparent conductivity (not true conductivity) = 2 aR. CONDUCTIVITY = 1/Rho.

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Field Value
Title A comparison of sea-ice thickness measurements made using ship-mounted and airborne electromagnetic induction devices
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/9d69e454-2060-4ed1-9712-5e42c972687a
Contact Point
Australian Ocean Data Network
metadata@aad.gov.au
Reference Period 30/09/2001 - 31/03/2002
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        139.352,
        -67.183
      ],
      [
        145.266,
        -67.183
      ],
      [
        145.266,
        -62.982
      ],
      [
        139.352,
        -62.982
      ],
      [
        139.352,
        -67.183
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Australian Oceans Data Network

Data Source

This dataset was originally found on Australian Oceans Data Network "A comparison of sea-ice thickness measurements made using ship-mounted and airborne electromagnetic induction devices". Please visit the source to access the original metadata of the dataset:
https://catalogue.aodn.org.au/geonetwork/srv/eng/csw/dataset/a-comparison-of-sea-ice-thickness-measurements-made-using-ship-mounted-and-airborne-electromagn