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TitleComparison of RADARSAT-2 and Sentinel-1 DInSAR displacements over upland ice-wedge polygonal terrain, Banks Island, Northwest Territories, Canada
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorShort, N HORCID logo; Fraser, R HORCID logo
SourceGeomatics Canada, Open File 73, 2023, 22 pages, Open Access logo Open Access
PublisherNatural Resources Canada
Documentopen file
Mediadigital; on-line
File formatpdf
ProvinceNorthwest Territories
NTS65; 66; 67; 68; 69; 75; 76; 77; 78; 79; 85; 86; 87; 88; 89; 95; 96; 97; 98; 99; 105; 106; 107; 108; 109; 115; 116; 117; 118; 119; 560; 780; 910
AreaBanks Island
Lat/Long WENS-146.0492 -103.9281 80.3658 63.4942
Subjectsgeneral geology; Science and Technology; radar imagery; ice wedges; satellites; permafrost; periglacial features
Illustrationslocation maps; photographs; tables; diagrams; graphs
ProgramCanada Centre for Remote Sensing Remote Sensing Science Program
Released2023 03 27
Comparisons of ground displacement measurements from RADARSAT-2 and Sentinel-1 Differential Interferometric Synthetic Aperture Radar (DInSAR) data show that high resolution RADARSAT-2 data (1-2 m) can distinguish differential thaw settlement patterns between ice wedge troughs and polygon centres. Medium resolution Sentinel-1 data (~20 m) cannot distinguish ground displacements over these smaller scale permafrost landforms. In addition, the medium resolution DInSAR data tend to under-estimate the true settlement of the ground, due to spatial averaging and the fact that smaller features with stronger subsidence trends are missed. High resolution ground displacement maps can be useful for infrastructure planning and engineering. Medium resolution displacement maps may be useful for regional scale overviews, trend detection and change monitoring.
Summary(Plain Language Summary, not published)
This report demonstrates the different terrain stability map products that can be derived over permafrost terrain using Canadian and European satellite radar systems.

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