Journal ArticleDOI
Interferometric estimation of three-dimensional ice-flow using ascending and descending passes
TLDR
The authors develop and demonstrate a technique that allows the three-component velocity vector to be estimated from data acquired along two track directions under a surface-parallel flow assumption, and their results are promising.Abstract:
Satellite radar interferometry (SRI) provides an important new tool for determining ice-flow velocity. Interferometric measurements made from a single-track direction are sensitive only to a single component of the three-component velocity vector. Observations from along three different track directions would allow the full velocity vector to be determined. A north/south-looking synthetic aperture radar (SAR) could provide these observations over large portions of the globe, but not over large areas of the polar ice sheets. The authors develop and demonstrate a technique that allows the three-component velocity vector to be estimated from data acquired along two track directions (ascending and descending) under a surface-parallel flow assumption. This technique requires that there are accurate estimates of the surface slope, which are also determined interferometrically. To demonstrate the technique, the authors estimate the three-component velocity field for the Ryder Glacier, Greenland. Their results are promising, although they do not have yet ground-truth data with which to determine the accuracy of their estimates.read more
Citations
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Journal ArticleDOI
Synthetic aperture radar interferometry
Paul A. Rosen,S. Hensley,Ian Joughin,F.K. Li,Soren N. Madsen,Ernesto Rodriguez,Richard M. Goldstein +6 more
TL;DR: In this paper, the authors present a review of the techniques of interferometry, systems and limitations, and applications in a rapidly growing area of science and engineering, including cartography, geodesy, land cover characterization, and natural hazards.
Journal ArticleDOI
Ice Flow of the Antarctic Ice Sheet
TL;DR: A reference, comprehensive, high-resolution, digital mosaic of ice motion in Antarctica assembled from multiple satellite interferometric synthetic-aperture radar data acquired during the International Polar Year 2007 to 2009 reveals widespread, patterned, enhanced flow with tributary glaciers reaching hundreds to thousands of kilometers inland over the entire continent.
Journal ArticleDOI
Persistent Scatterer Interferometry: A review
TL;DR: This paper provides a review of the main PSI algorithms proposed in the literature, describing the main approaches and the most important works devoted to single aspects of PSI, and discusses the main open PSI problems and the associated future research lines.
Journal ArticleDOI
Greenland flow variability from ice-sheet-wide velocity mapping
TL;DR: In this paper, the authors have mapped the flow velocity over much of the Greenland ice sheet for the winters of 2000/01 and 2005/06 using RADARSAT synthetic aperture radar data.
Journal ArticleDOI
Glacier motion estimation using SAR offset-tracking procedures
TL;DR: Two image-to-image patch offset techniques for estimating feature motion between satellite synthetic aperture radar (SAR) images are discussed and their accuracy and application range are examined in the case of the surge of Monacobreen in Northern Svalbard.
References
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Journal ArticleDOI
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Mary C. Seiler,Fritz A. Seiler +1 more
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The Physics of Glaciers
W.S.B. Paterson,John T. Andrews +1 more
TL;DR: In this paper, the transformation of snow to ice mass balance heat budget and climatology structure and deformation of ice hydraulics and glaciers glacier sliding deformation, subglacial till structures and fabrics in glaciers and ice sheets distribution of temperature in glaciers, flow of ice shelves and ice streams non-steady flow of glaciers, ice sheets surging and tidewater glaciers ice core studies.
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Satellite radar interferometry: Two-dimensional phase unwrapping
TL;DR: In this paper, an approach to 'unwrapping' the 2 pi ambiguities in the two-dimensional data set is presented, where it is found that noise and geometrical radar layover corrupt measurements locally, and these local errors can propagate to form global phase errors that affect the entire image.
Journal ArticleDOI
Decorrelation in interferometric radar echoes
Howard A. Zebker,J. Villasenor +1 more
TL;DR: It is found that there is decorrelation increasing with time but that digital terrain model generation remains feasible and such a technique could provide a global digital terrain map.