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Interferometric SAR for observation of glacier motion and firn penetrationA digital elevation model (DEM) for a swath in west Greenland above Jakobshavn Isbrae derived from a number ERS-1 interferograms combined so as to reduce phase errors and other problems is presented. The DEM shows a wealth of kilometer-scale, dynamically supported topography, which arises from ice sheet flow over the rough bed. A correlation is shown between topography and interferometric phase due solely to ice sheet motion, which clearly shows the translations of scatterers in the surface up and downslope in the topography. Finally, the low correlation in interferograms of ice sheet dry snow zones motivates investigation on the depth-locus of backscattering. A scattering model is presented, including realistic firn grain size distributions and layering, which shows that layering helps to localize backscattering from dry firn to shallower depths than would otherwise be expected.
Document ID
19990078400
Acquisition Source
Jet Propulsion Laboratory
Document Type
Conference Paper
Authors
Winebrenner, Dale P.
(Washington Univ. Seattle, WA United States)
Joughlin, Ian R.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Fahnestock, Mark A.
(Maryland Univ. College Park, MD United States)
Date Acquired
August 19, 2013
Publication Date
May 1, 1997
Publication Information
Publication: Proceedings of the 3rd ERS Symposium on Space at the Service of Our Environment
Volume: 2
Subject Category
Earth Resources And Remote Sensing
Distribution Limits
Public
Copyright
Other
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