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A comparison of sea-ice thickness measurements made using ship-mounted and airborne electromagnetic induction devices

Created 13/03/2025

Updated 13/03/2025

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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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Title A comparison of sea-ice thickness measurements made using ship-mounted and airborne electromagnetic induction devices
Language eng
Licence notspecified
Landing Page https://devweb.dga.links.com.au/data/dataset/3274d017-ba23-4ae9-a4b6-aa95aca6eaa4
Contact Point
CSIRO Oceans & Atmosphere
metadata@aad.gov.au
Reference Period 30/09/2001 - 31/03/2002
Geospatial Coverage {"type": "Polygon", "coordinates": [[[139.352, -67.183], [145.266, -67.183], [145.266, -62.982], [139.352, -62.982], [139.352, -67.183]]]}
Data Portal data.gov.au

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This dataset was originally found on data.gov.au "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://devweb.dga.links.com.au/data/dataset/a-comparison-of-sea-ice-thickness-measurements-made-using-ship-mounted-and-airborne-electromagn

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