| Title | Comparison of RADARSAT-2 and Sentinel-1 DInSAR displacements over upland ice-wedge polygonal terrain, Banks Island, Northwest Territories, Canada |
| Download | Downloads |
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| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Short, N H ;
Fraser, R H |
| Source | Geomatics Canada, Open File 73, 2023, 22 pages, https://doi.org/10.4095/331683  Open Access |
| Image |  |
| Year | 2023 |
| Publisher | Natural Resources Canada |
| Document | open file |
| Lang. | English |
| Media | digital; on-line |
| File format | pdf |
| Province | Northwest Territories |
| NTS | 65; 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 |
| Area | Banks Island |
| Lat/Long WENS | -146.0492 -103.9281 80.3658 63.4942 |
| Subjects | general geology; Science and Technology; radar imagery; ice wedges; satellites; permafrost; periglacial features |
| Illustrations | location maps; photographs; tables; diagrams; graphs |
| Program | Canada
Centre for Remote Sensing Remote Sensing Science Program |
| Released | 2023 03 27 |
| Abstract | (Summary)
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. |
| GEOSCAN ID | 331683 |
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