Elevation changes and X-band ice and snow penetration inferred from TanDEM-X data of the Mont-Blanc area

Elevation changes and X-band ice and snow penetration inferred from TanDEM-X data of the Mont-Blanc area
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根据勃朗峰地区 TanDEM-X 数据推断的海拔变化和 X 波段冰雪渗透率

DOI:
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发表时间:
2015
期刊:
International Workshop on the Analysis of Multitemporal Remote Sensing Images
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通讯作者:
E. Berthier
E. Berthier
中科院分区:
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文献类型:
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作者:
R. Millan;A. Dehecq;E. Trouvé;N. Gourmelen;E. Berthier

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在本文中,我们处理TanDEM-X场景,获得2012年5月和2013年11月之间,使用从Pléiades图像获得的高分辨率DEM,获得5个新的DEM在勃朗峰地区,通过差分雷达干涉测量(D-InSAR)。冰外DEM的垂直精度在1.92-3.10 m之间。在接近的日期从光学和雷达传感器得出的DEM之间的比较允许使用来估计雷达信号到雪和冰的渗透。它可以达到7米,在干燥的冰雪中,10月海拔高于3500米,2月海拔高于2500米。在推导冰川质量平衡时必须考虑到这种差异,特别是在短期内。
In this paper, we process TanDEM-X scenes, acquired between May 2012 and November 2013, with the use of a high-resolution DEM obtained from Pléiades images, to derive 5 new DEMs in the Mont Blanc area, by mean of differential radar interferometry (D-InSAR). The vertical precision of the DEMs estimated off ice is in the range 1.92-3.10 m. The comparison between the DEMs derived from optical and radar sensors at close dates allows use to estimate the penetration of the radar signal into snow and ice. It can reach 7 m in dry snow and ice, for elevations higher than 3500 m in October and 2500 m in February. This difference must be taken into account when deriving glaciers mass balance, especially over short periods.