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Summary of Proposal MTH1293

TitleNear real-time deformation monitoring using TerraSAR-X data (this proposal is a logical extension of our previous proposal MTH0246)
Investigator Hanssen, Ramon - Delft University of Technology, Dept. of Earth Observation and Space systems
Team MemberNo team members defined
  1. Objective: Near real-time deformation monitoring using TerraSAR-X data: target characterization and interpretation, recursive monitoring system for tracking coherent scatterers over time
  2. Deliverables: Layers of deformation maps estimated in recursive manner, quality description, validation and method cross-comparison results, web portal(s)
  3. Funding source: Delft University of Technology
  4. Summary:
    1. General work flow: (1)Acquisition data ordering: Standard products (TerraSAR-X StripMap mode) images: all available images from descending and ascending orbits over Netherlands, priorities are the city of Amsterdam and Delft; (2)Improvement of advanced models for conventional InSAR processing (e.g.coregistration, unwrapping, filtering, etc.). (3)Implementation analysis InSAR Development of algorithm to obtain the deformation time series for all coherent pixels.
    2. Target characterization and deformation interpretation The PS type classification and deformation interpretation is performed in the following processing stages 1)Phase data processing: A master image is selected from the TerraSAR-X time series data and all the images are coregistered with respect to the master image. Single master interferograms are generated and persistent scatterer interferometry is applied to estimate the height and deformation of persistent scatterers (PS). 2)Amplitude data processing: The amplitude information of each PS is extracted from the coregistered images and amplitude variation over Doppler and perpendicular baselines are processed to estimate the spatial extent of PS. 3)Polarization data processing: Full polarization data were obtained from TerraSAR-X dual receive antenna mode acquisitions conducted during April to May 2010. TerraSAR-X quad-pol data are first coregistered with the same master image used in the phase data processing. Then the auto-interferograms between HH and VV polarization channels are exploited to identify the odd and even bounce nature of the PS. 4)Target type classification and deformation interpretation: PS from ground, building and building-to-ground (BG) interface are separated and the building versus ground differential (BGD) motion is computed for a given region. The BGD metric is used as one of the means to identify the potential unsafe urban zones.
    3. Recursive PSI analysis - Near-real time (NRT) processing system PSI and recursive-PSI processing: First module: Automatic data download from the FTP-server automatically.Second module: Process all the data when the new data adds in, find an approach to decrease the computation time, obtain the PS points and establish the model and estimators for parameters.Third module: Testing.Fourth module: Reporting and practical decision.

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