Science Service System

Summary of Proposal GEO2657

TitleMonitoring ground deformation using TerraSAR StaringSpotlight data with dInSAR and sub-Pixel Offset Tracking (sPOT) for casestudies in United Kingdom
Investigator Muller, Jan-Peter - University College London, Space and Climate Physics
Team Members
Ms Freemantle, Terri - Satellite Applications Catapult Ltd, N/A
Prof. Li, Zhenhong - Newcastle University, School of Civil Engineering and Geosciences
SummaryObjectives: This project will collect a systematic time series of TerraSAR-X Staring Spotlight data over two sites (Rooks Nest and Queen Elizabeth II Bridge) on the M25 motorway and landslip site in the Rest and Be Thankful on A83 of UK to monitor ground deformation. The use of sub-Pixel Offset Tracking (sPOT) method and the potential and limitations of combining this method with dInSAR techniques for deformation mapping will be assessed. Current sPOT measurements of deformation require corner reflectors to achieve the highest possible accuracy. We attempt to assess whether the much higher spatial resolution available with the Staring Spotlight mode will be able to achieve better accuracy and coverage for bare earth retrievals than either spotlight and strip modes. Methods: For a 2-year time series of TSX Staring Spotlight acquisitions, data collection every 11 days should start as soon as possible and certainly no later than August 2014. Both time series dInSAR and sub-Pixel OffsetTracking (sPOT) method will be applied to measure ground deformation. The potential and limitations of combining time series dInSAR with sPOT to monitor landslides in the above sites using the Staring Spotlight data will be assessed.Results will be validated by comparison amongst the measurements from different software and available ground truth data. Data requirements: We wish to obtain new acquisitions of TerraSAR-X Staring Spotlight data covering the two sites (Rooks Nest, Queen Elizabeth II Bridge)on the M25 and the Rest and Be Thankful on A83 of UK from August 2014 July2016 (or 2 years after the acceptance of the proposal whichever is sooner). Deliverables: (1) A2-year time series of land subsidence of Rooks Nest and Queen Elizabeth IIBridge on M25 in UK; (2) A2-year time series of land slip of the Rest and Be Thankful on A83 in Scotland; (3) An assessment of the potential and limitations of combining time series differential InSAR techniques with sub-Pixel Offset Tracking (sPOT) to monitor ground deformation in the above sites using the Staring Spotlight data. Funding: This work will be partly supported by the China Scholarship Council, by the Dean of MAPS fund at UCL, by NERC and EPSRC DTC funding at Newcastle University. The work at The Satellite Applications Catapult will be supported by the Technology Strategy Board (TSB) and jointly funded by ESA and The Satellite Applications Catapult.

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