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Summary of Proposal GEO3519

TitleFrostInSAR: Upscaling the investigation of periglacial landforms in the Norwegian Arctic using Synthetic Aperture Radar Interferometry
Investigator Lauknes, Tom Rune - Norut, Earth Observation
Team Member
Ms. Rouyet, Line - Norut, Earth Observation
Adj. Blikra, Lars Harald - The Arctic University of Norway (UiT), Institute of geosciences
Prof. Christiansen, Hanne H. - The University Centre of Svalbard (UNIS), Arctic Geology
Prof. Hjort, Jan - University of Oulu, Department of geography
Ass.Prof. Liu, Lin - Chinese University of Hong Kong (CUHK), Earth System Science
Dr. Bartsch, Annett - Austrian Polar Research Institute, Zentralanstalt für Meteorologie und Geodynamik (ZAMG)
Summary

This TerraSAR-X AO project will fill the X-band SAR data requirement in the Norwegian Research Council funded project "FrostInSAR: Upscaling the investigation of periglacial landforms in the Norwegian Arctic using Synthetic Aperture Radar Interferometry".

The main objective of FrostInSAR is to increase the value of satellite Synthetic Aperture Radar Interferometry (InSAR) technology to upscale the investigation of periglacial landforms and provide a better understanding of the spatio-temporal deformation patterns related to ground freeze/thaw in the Norwegian Arctic. By combining ground deformation derived from Synthetic Aperture RadarInterferometry (InSAR) with various types of field observations andin-situ measurements, the project aims to measure, explain and predictthe state and evolution of ground deformation related to freeze/thawprocesses. The project is designed to include complementary study sites in Northern Norway and Svalbard in areas with perennial frozen ground (permafrost)or seasonally frozen ground.

At two study sites (Lyngenfjord-Kaafjord, Troms County, northern Norway and Adventdalen-Longyeardalen, Svalbard Archipelago), different SAR satellites (Sentinel-1a/b, Radarsat-2, TerraSAR-X) will be compared to assess the impact of different frequencies, repeat-passes, spatial coverages and resolutions. The project aims to compare different InSAR methods related to distributed scattering mechanisms (Small BAseline Subset), dominating scattering mechanisms (Permanent Scatterers Interferometry) or algorithms combining the properties of the two mechanisms. InSAR processing will be performed using the GSAR software, a generic processing system developed by Norut. The software is sensor independent with support for all currently used SAR data, including Sentinel-1. It includes SBAS and PSI processing chains, which are in constant implementation to integrate new algorithms and fit with current processing challenges.

This TSX-AO proposal is the continuation of TSX-AO GEO0565. We apply for the further research use of the datasets acquired since 2009 at the study sites, as well as the acquisitions of new scenes between 2017 and 2019 to complete the unique SAR collection. Since we are interested in separating vertical and horizontal displacement components, we would like to acquire data from both ascending and descending orbits, with a relatively high incidence angle. The new acquistions include TSX StripMap scenes during 3 snow-free seasons covering the start of the thawing and freezing periods (between May and October). This corresponds to 156 new scenes (approximately 13 per year from both orbits at 2 sites). Due to the extensive InSAR research at Norut these last years, the datasets will be 10 year long at the end of the project (2009-2019).

FrostInSAR is a PhD project and will include three peer-reviewed journal publications in addition to the final thesis. The results will also be presented in relevant conferences (Fringe, Living Planet Symposium, EUCOP, ICOP, EGU/AGU), workshops and seminars and though complementary web/media tools.

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