High-Resolution Dems of Active Volcanoes from Tandem-X Data: Implications for Flow Modeling and Hazard Assessment
Volcanoes, Coherence, Hazards, Standards, Adaptation models, Numerical models, Surfaces
Digital Object Identifier (DOI)
The bistatic acquisition mode of the TanDEM-X radar satellite mission provides a new reliable source for generating high-resolution (~10m) digital elevation models (DEMs) of active volcanoes. For high relief-mountainous areas with steep slopes - like stratovolcanoes - geometric distortions considerably affect the accuracy of the DEMs. The TanDEM-X system allow for the first time access to high-resolution DEMs for both orbits (ascending and descending) which, by using an adaptive approach to combine multiple acquisitions from different viewing angles, considerably increase the accuracy of the DEM over difficult terrain like active volcanoes. By integrating these DEMs into standard numerical flow modeling, we are able to enhance the performance of standard terrain-dependent volcanic flow models and reduce the uncertainty that inevitably arises in application of topographic models of varying resolutions. Our study pushes the limits on where and how SAR data can be used to derive accurate DEMs under extreme conditions.
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Citation / Publisher Attribution
High-Resolution Dems of Active Volcanoes from Tandem-X Data: Implications for Flow Modeling and Hazard Assessment, in IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium, July 2018, Valencia, Spain, p. 399-402
Scholar Commons Citation
Charbonnier, Sylvain J.; Deng, Fanghui; Dixon, Timothy H.; and Malservisi, Rocco, "High-Resolution Dems of Active Volcanoes from Tandem-X Data: Implications for Flow Modeling and Hazard Assessment" (2018). School of Geosciences Faculty and Staff Publications. 1558.