Mapping Palaeohydrography in Deserts: Contribution from Space-Borne Imaging Radar
Mapping Palaeohydrography in Deserts: Contribution from Space-Borne Imaging Radar
复制标题
绘制沙漠古水文学图：星载成像雷达的贡献
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
P. Paillou
中科院分区：
文献类型：
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作者：
P. Paillou
星载合成孔径雷达（SAR）能够对干旱地区几米深的地下特征成像。由于第一次航天飞机成像雷达使命，这种能力的第一次演示是在80年代初在埃及沙漠中进行的。最近的合成孔径雷达，如日本的ALOS/PALSAR传感器，提供了全球覆盖，从而能够对北方非洲的广大古代水文系统进行测绘。我们提出了一个总结，如撒哈拉和戈壁大沙漠使用PALSAR数据获得的古水文结果。在利比亚东部发现了一个古老的河流系统，过去将库夫拉绿洲与地中海连接起来，塔曼拉塞特河的终点部分被绘制在毛里塔尼亚西部，以一个大型海底峡谷结束。在蒙古南部，PALSAR图像与地形分析相结合，使得能够绘制古老的乌拉湖的地图。最后，我们通过比较L波段（1.25 GHz）和P波段（435 MHz）的机载SAR收购在突尼斯南部的沙漠站点的未来低频SAR传感器的潜力。
Space-borne Synthetic Aperture Radar (SAR) has the capability to image subsurface features down to several meters in arid regions. A first demonstration of this capability was performed in the Egyptian desert during the early eighties, thanks to the first Shuttle Imaging Radar mission. Global coverage provided by recent SARs, such as the Japanese ALOS/PALSAR sensor, allowed the mapping of vast ancient hydrographic systems in Northern Africa. We present a summary of palaeohydrography results obtained using PALSAR data over large deserts such as the Sahara and the Gobi. An ancient river system was discovered in eastern Lybia, connecting in the past the Kufrah oasis to the Mediterranean Sea, and the terminal part of the Tamanrasett river was mapped in western Mauritania, ending with a large submarine canyon. In southern Mongolia, PALSAR images combined with topography analysis allowed the mapping of the ancient Ulaan Nuur lake. We finally show the potentials of future low frequency SAR sensors by comparing L-band (1.25 GHz) and P-band (435 MHz) airborne SAR acquisitions over a desert site in southern Tunisia.
影响因子：
13.5
作者：
Le Toan, T.;Quegan, S.;Ulander, L.
通讯作者：
Ulander, L.