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首页> 外文期刊>IEEE Transactions on Geoscience and Remote Sensing. >Tracking subpixel-scale sastrugi with Advanced Land Imager
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Tracking subpixel-scale sastrugi with Advanced Land Imager

机译:使用Advanced Land Imager跟踪亚像素级的sastrugi

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摘要

High radiometric resolution imagery from the Advanced Land Imager (ALI) can detect the spatial reflectance variations associated with sastrugi (snow dunes) on ice sheets. This is shown, in theory, by considering the appropriate SNR ratio of ALI as compared with eight-bit optical sensors and, in practice, with multitemporal ALI imagery. Comparison of ALI imagery spanning 7.5 months also shows that the reflectance pattern associated with sastrugi can persist over this interval offering the potential of their use for measuring ice sheet velocity in uncrevassed regions.
机译:来自高级陆地成像仪(ALI)的高辐射分辨率图像可以检测出与冰盖上的sastrugi(沙丘)相关的空间反射率变化。从理论上讲,这是通过考虑与八位光学传感器进行比较的ALI的合适SNR比,以及在实践中与多时间ALI图像进行比较而得出的。跨越7.5个月的ALI图像的比较还显示,与sastrugi相关的反射率模式可以在此间隔内持续存在,这为将其用于测量无裂缝地区的冰盖速度提供了潜力。

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