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TitleGeomorphic, Active Layer and Environmental Change Detection Using SAR Scene Coherence Images
DownloadDownloads (Preprint)
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorBudkewitsch, P; D'Iorio, M; Vachon, P W; Pollard, W H; Andersen, D T
SourceSixth Circumpolar Symposium on Remote Sensing of Polar Environments, Yellowknife, Northwest Territories, Canada, June 12 - 14; 2000., Open Access logo Open Access
Alt SeriesEarth Sciences Sector, Contribution Series 20042869
Mediapaper; on-line; digital
File formatpdf
Released2000 01 01
AbstractInterferometric scene coherence images derived from synthetic aperture radar (SAR) data can reveal terrain morphology, stability, and highlight environmental changes. Regions of high phase correlation suggest terrain stability; regions of low phase coherence suggest physical changes have occurred at the scale of the radar wavelength. We consider coherence images of the Canadian High Arctic from tandem ERS-1/2 and repeat passes of ERS-1 and RADARSAT-1. Large slopes reduce coherence, as is evident from ERS tandem data acquired with a 1-day interval. Other reductions in coherence can be accounted for by the accumulation or migration of snowdrifts and by compaction or re-crystallisation of the snow pack on the ground surface. In arctic environments, the scene coherence can reveal greater geomorphological detail than can be seen in SAR images or other optical data. As such, coherence images could be an important monitoring tool, especially during the winter months when snow cover and darkness impede observation with optical remote sensing methods.

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