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

Volume

41

Issue

6

fYear

2003

fDate

6/1/2003 12:00:00 AM

Firstpage

1373

Lastpage

1377

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;

fLanguage

English

Journal_Title

Geoscience and Remote Sensing, IEEE Transactions on

Publisher

ieee

ISSN

0196-2892

Type

jour

DOI

10.1109/TGRS.2003.812902

Filename

1220245