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

• Other Authors: REID, JAMES (hasPrincipalInvestigator), REID, JAMES (processor), Australian Antarctic Data Centre (publisher)
• Format: Dataset
• Language: unknown
• Published: Australian Antarctic Data Centre
• Subjects: oceans; ICE DEPTH/THICKNESS; EARTH SCIENCE; SEA ICE; A; ANTARCTICA; COND; COND-A; CONDUCTIVITY; DAY; FREEBOARD; ICE THICKNESS; LASER; LATITUDE; LONGITUDE; PHASE; PHASE-A; PITCH; R; RHO; ROLL; SITE; SNOW THICKNESS; SOUTHERN OCEAN; TIME; Altimeters; Aircraft; SHIPS; OCEAN > CONTINENT > GEOGRAPHIC REGION > POLAR; Antarctic; Southern Ocean; Rho; Antarc*; Antarctica; Sea ice
• Online Access: https://researchdata.ands.org.au/comparison-sea-ice-induction-devices/699700; https://doi.org/10.4225/15/55E8FEBE1952E; https://data.aad.gov.au/metadata/records/ASAC_1342; http://nla.gov.au/nla.party-617536

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.