Science Service System

Summary of Proposal GEO2658

TitleMonitoring ground deformation using TerraSAR StaringSpotlight data with dInSAR and sub-Pixel Offset Tracking (sPOT) for casestudies in South Korea and Brazil
Investigator Muller, Jan-Peter - University College London, Space and Climate Physics
Team Members
Prof. Kim, Jung-Rack - University of Seoul, Department of Geo-Informatics
Mr Hong, Sungwook - National Meteorological Satellite Center, Senior research fellow
SummaryObjectives: This project willuse a systematic time series of TerraSAR-X Staring Spotlight data over the two proposed sites in Mountainous Regions with informal settlementsin the Brazilian state of Rio de Janeiro; and an area well-known for landslidesduring heavy rainfall, Gangneung inSouth Korea, to monitor ground deformation. The use of thesub-Pixel Offset Tracking (sPOT) method and the potential and limitations ofcombining this method with differential Interferometric Synthetic ApertureRadar (dInSAR) techniques for deformation mapping will be assessed. Current sPOT measurements of deformationrequire corner reflectors to achieve the highest possible accuracy and relatespaceborne measurements to solid earth landslide deformation. We attempt toassess whether the much higher spatial resolution available with the StaringSpotlight mode will be able to achieve better accuracy and coverage for solid earthretrievals than either spotlight and strip modes can achieve. Methods: For a 2-year timeseries of TSX Staring Spotlight acquisitions, data collection every 11 daysshould start as soon as possible and certainly no later than mid-August 2014. Bothtime series dInSAR and sub-PixelOffset Tracking (sPOT) methods will be applied to measure ground deformation ofall study sites. The potential andlimitations of combining time series differential InSAR techniques with sPOT tomonitor landslides in the above sites using the Staring Spotlight data will beassessed. Results will bevalidated by comparison betweenmeasurements using differentsoftware and available ground truth data. Data requirements: We wish to obtain newacquisitions of TerraSAR-X Staring Spotlight data covering the two sites in theMountainous Region in the Brazilian state of Rio de Janeiro and Gangneung ofSouth Korea from August 2014 July 2016 (or 2 years after the acceptance ofthe proposal whichever is sooner). Deliverables: (1) A 2-year timeseries of landslide rate of the 2 sites in Mountainous Region in the Brazilian stateof Rio de Janeiro; (2) A2-year time series of landslide rate of Gangneung of South Korea;(3)An assessment of thepotential and limitations of combining time series dInSAR with sub-Pixel Offset Tracking (sPOT) to monitor ground deformation in the above sites using the StaringSpotlight data. Funding: This research willbe partly funded in Korea by national government funding through the Korean MetAgency which is responsible for the Korea X-band SAR. The work will also be partlysupported by the China Scholarship Council and the Dean of MAPS fund at UCL.

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