Title :
Tracking subpixel-scale sastrugi with Advanced Land Imager
Author :
Bindschadler, Robert
Author_Institution :
Lab. for Hydrospheric Processes, NASA Goddard Space Flight Center, Greenbelt, MD, USA
fDate :
6/1/2003 12:00:00 AM
Abstract :
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.
Keywords :
hydrological techniques; optical tracking; snow; terrain mapping; ALI data; Advanced Land Imager data; high radiometric resolution imagery; ice sheets; snow dunes; spatial reflectance variations; subpixel-scale sastrugi; tracking; Extraterrestrial measurements; Ice surface; Optical interferometry; Optical sensors; Quantization; Reflectivity; Satellite broadcasting; Sea surface; Spatial resolution; Surface topography;
Journal_Title :
Geoscience and Remote Sensing, IEEE Transactions on
DOI :
10.1109/TGRS.2003.812902
