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Calibration of a Low Induction Number Electromagnetic Instrument for Sea Ice Thickness Measurements


Reid, JE and Kimber, B and Worby, AP, Calibration of a Low Induction Number Electromagnetic Instrument for Sea Ice Thickness Measurements, Journal of Environmental & Engineering Geophysics, 9, (1) pp. 43-50. ISSN 1083-1363 (2004) [Refereed Article]

DOI: doi:10.4133/JEEG9.1.43


Sea ice thickness measurements using low induction number electromagnetic instruments require accurate electromagnetic data. Calibration of EM sea ice thickness data acquired using a shipbome low induction number electromagnetic sensor can be performed by making measurements at a range of heights over level sea ice of known thickness, and by comparing the observed data with the expected layered-earth response. Calibration corrections can be derived using least-squares inversion to minimise the misfit between the observed data and the theoretical response, and can be applied to ship-borne sea ice thickness data during post-processing. This paper presents a case history illustrating identification and correction of calibration errors in low induction number electromagnetic data for shipborne Antarctic sea ice thickness measurements. The method described could also be applied to calibration of low induction number electromagnetic instruments for conventional environmental and engineering geophysical surveys.

Item Details

Item Type:Refereed Article
Research Division:Earth Sciences
Research Group:Geophysics
Research Field:Electrical and electromagnetic methods in geophysics
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the earth sciences
UTAS Author:Reid, JE (Dr James Reid)
UTAS Author:Kimber, B (Mrs Bronwyn Kimber)
UTAS Author:Worby, AP (Professor Anthony Worby)
ID Code:32664
Year Published:2004
Web of Science® Times Cited:2
Deposited By:Earth Sciences
Deposited On:2004-08-01
Last Modified:2011-11-04

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