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InSAR decorrelation to assess and prevent volcanic risk

机译:InSAR解相关以评估和预防火山风险

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SAR can be invaluable describing pre-eruption surface deformation and improving the understanding of volcanic processes. This work studies correlation of pairs of SAR images focusing on the influence of surface, climate conditions and acquisition band. Chosen L-band and C-band images (ENVISAT, ERS and ALOS) cover most of the Yellowstone caldera (USA) over a span of 4 years, sampling all the seasons. Interferograms and correlation maps are generated and studied in relation to snow depth and temperature. To isolate temporal decorrelation pairs of images with the shortest baseline are chosen. Results show good performance during winter, bad attitude towards wet snow and good coherence during summer with L-band performing better over vegetation.
机译:SAR对于描述喷发前的地表变形和增进对火山作用的理解是无价的。这项工作研究了成对的SAR图像的相关性,重点是地表,气候条件和采集波段的影响。选定的L波段和C波段图像(ENVISAT,ERS和ALOS)覆盖了整个4年的黄石破火山口(美国)的大部分区域,并采样了所有季节。产生和研究与雪深和温度有关的干涉图和相关图。为了隔离时间去相关,选择具有最短基线的图像对。结果表明,冬季表现良好,对湿雪的态度较差,夏季表现出良好的连贯性,其中L波段的表现优于植被。

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