DRY SNOW ANALYSIS IN ALPINE REGIONS USING RADARSAT-2 FULL POLARIMETRY DATA. COMPARISON WITH IN SITU MEASUREMENTS

被引：8
|
作者：
Dedieu, J. -P. [1 ]
Besic, N.
Vasile, G.
Mathieu, J. [1 ]
Durand, Y.
Gottardi, F.
机构：
[1] Univ Grenoble Alpes, CNRS, LTHE, Grenoble, France
来源：
2014 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS) | 2014年
关键词：
dry snow; polarimetry; entropy; BACKSCATTERING; MULTIFREQUENCY; CLASSIFICATION;
D O I：
10.1109/IGARSS.2014.6947276
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In this paper we describe the benefits of RADARSAT-2 in the analysis of temporal changes in polarimetric parameters linked to the snow cover evolution during the winter season. The presented study took place over an instrumented area in the region of French Alps. The focus is set on the dry snow depth retrieval, using an original method based on principal component statistical analysis (PCA) of the polarimetric parameters values. The results obtained by this mean are compared with the network of simultaneous snow in situ measurements. The most thought-provoking result is the strong inverse correlation between the snow depth above the ice crust and the entropy, reflected through the very high coefficient of determination R-2 = 0:8439. In order to justify this observation, we propose an appropriate physical hypothesis.
引用
收藏
页码：3658 / 3661
页数：4
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