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- Dammann, Dyre Oliver, 1985, et al.
(författare)
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New possibilities using TSX and TDX in support of sea ice use
- 2018
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Ingår i: Proceedings of the European Conference on Synthetic Aperture Radar, EUSAR. - 2197-4403. ; 2018-June, s. 159-164
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Konferensbidrag (refereegranskat)abstract
- Sea ice travel and on-ice operations are important for Arctic coastal communities and industrial operations. Recent rapid changes in Arctic sea ice impacting ice users emphasize the need for assessment strategies capable of guiding decision makers and documenting change in key ice-use related parameters. In this paper, we demonstrate the potential for the use of TSX and TDX interferometry to assess deformation, drift, and roughness of coastal sea ice. Through on-ice validation using Structure-from-Motion and high-precision GPS, we demonstrate a high level of detail and accuracy potentially enabling the use of these products in decision making.
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| 2. |
- Dammann, Dyre Oliver, 1985, et al.
(författare)
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Traversing Sea Ice-Linking Surface Roughness and Ice Trafficability Through SAR Polarimetry and Interferometry
- 2018
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Ingår i: IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing. - 2151-1535 .- 1939-1404. ; 11:2, s. 416-433
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Tidskriftsartikel (refereegranskat)abstract
- Arctic landfast sea ice is widely utilized for transportation by local communities and industry, with trafficability largely governed by ice roughness. Here, we introduce an approach to evaluate ice roughness that can aid in routing of ice roads and assessment of spatial variability and long-term changes in trafficability. Drawing on synthetic aperture radar (SAR) polarimetry, SAR interferometry (InSAR), and other remote sensing techniques, we integrated approaches into the trafficability assessment that had rarely been applied over sea ice in the past. Analysis of aerial photogrammetry obtained through structure-from-motion helped verify cm-scale accuracy of X-band InSAR-derived ridge height and link L-band polarimetric classification to specific roughness regimes. Jointly, these approaches enable a km-scale evaluation of ridge topography and cm-to m-scale roughness-both critical for the assessment of trafficability. A trafficability index was derived from such SAR data in conjunction with analysis of ice trail routing and ice use near Utqiaġvik, Alaska. The index identifies areas of reduced trafficability, associated with pressure ridges or rubble ice, and served to delineate favorable trail routes for different modes of transportation, with potential uses ranging from ice road routing to emergency evacuation. Community outreach is needed to explore how this approach could assist different ice users in reducing risk, minimizing trail or ice construction efforts, and improving safety.
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