the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
SAR image observations of the A-68 iceberg drift
Abstract. A methodology for examining a temporal sequence of Synthetic Aperture Radar (SAR) images as applied to the detection of the A-68 iceberg and its drifting trajectory, is presented. Using an improved image processing scheme, the analysis covers a period of eighteen months and makes use of a set of Sentinel-1 images. A-68 iceberg calved from the Larsen C ice shelf in July 2017 and is one of the largest icebergs observed by remote sensing on record. After the calving, there was only a modest decrease in the area (about 1 %) in the first six months. It has been drifting along the east coast of the Antarctic Peninsula and it is expected to continue its path for more than a decade. It is important to track the huge A-68 iceberg to retrieve information on the physics of iceberg dynamics and for maritime security reasons. Two relevant problems are addressed by the image processing scheme presented here: (a) How to achieve quasi-automatic analysis using a fuzzy logic approach to image contrast enhancement, and (b) Adoption of ferromagnetic concepts to define a stochastic segmentation. The Ising equation is used to model the energy function of the process, and the segmentation is the result of a stochastic minimization.
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RC1: 'Review', Anonymous Referee #1, 18 Aug 2020
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AC1: 'Response to the referee's comments', Miguel Moctezuma-Flores, 07 Sep 2020
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AC1: 'Response to the referee's comments', Miguel Moctezuma-Flores, 07 Sep 2020
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RC2: 'Report on “SAR image observations of the A-68 iceberg drift“ by Lopez-Lopez et al.', Anonymous Referee #2, 22 Sep 2020


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RC1: 'Review', Anonymous Referee #1, 18 Aug 2020
-
AC1: 'Response to the referee's comments', Miguel Moctezuma-Flores, 07 Sep 2020
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AC1: 'Response to the referee's comments', Miguel Moctezuma-Flores, 07 Sep 2020
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RC2: 'Report on “SAR image observations of the A-68 iceberg drift“ by Lopez-Lopez et al.', Anonymous Referee #2, 22 Sep 2020
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