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2010-12-17

A Study of an Inversion Model for Sea Ice Thickness Retrieval in Ross Island, Antarctica

By Yu Jen Lee, Wee Keong Lim, and Hong-Tat Ewe
Progress In Electromagnetics Research, Vol. 111, 381-406, 2011
doi:10.2528/PIER10100411

Abstract

In this study, an inverse microwave scattering model for sea ice has been developed for the purpose of sea ice thickness retrieval using radar backscatter data. The model is loosely based on the Radiative-Transfer-Thermodynamic Inverse Model for Sea Ice Thickness Retrieval from Time-Series Scattering Data. The developed inverse model is a combination of the Radiative Transfer Theory with Dense Medium Phase and Amplitude Correction Theory (RT-DMPACT) forward model and the Levenberg-Marquardt Optimization algorithm. Using input data from ground truth measurements carried out in Ross Island, Antarctica, together with radar backscatter data extracted from purchased satellite images, the sea ice thickness of an area is estimated using the inverse model developed. The estimated sea ice thickness is then compared with the ground truth measurement data to verify its accuracy. The results have shown good promise, with successful estimation of the sea ice thickness within ±0.15 m of the actual measurement. A theoretical analysis has also revealed that the model faces difficulty once the sea ice thickness exceeds 1.7m. This can be considered in the future development and improvement of the model.

Citation


Yu Jen Lee, Wee Keong Lim, and Hong-Tat Ewe, "A Study of an Inversion Model for Sea Ice Thickness Retrieval in Ross Island, Antarctica," Progress In Electromagnetics Research, Vol. 111, 381-406, 2011.
doi:10.2528/PIER10100411
http://jpier.org/PIER/pier.php?paper=10100411

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