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Land Use Planning and Natural Risk division

RESUM. Deformation analysis in Paris using a multi-interferogram Least-Squares approach S . Le Mouélic, D. Raucoules, C. Carnec, D. Feurer BRGM, ARN/MAS, Marseille, France C. Colesanti, T.R.E, Via V. Colonna, 7, Milano, Italy B. Fruneau, B. Deffontaines, Université de Marne-la-vallée, France.

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Land Use Planning and Natural Risk division

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  1. RESUM Deformation analysis in Paris using a multi-interferogram Least-Squares approachS. Le Mouélic, D. Raucoules, C. Carnec, D. FeurerBRGM, ARN/MAS, Marseille, France C. Colesanti, T.R.E, Via V. Colonna, 7, Milano, ItalyB. Fruneau, B. Deffontaines,Université de Marne-la-vallée, France Land Use Planning and Natural Risk division

  2. Objective : to bypass the limitations encountered in conventional interferometry by using a large set of data • registration of a whole set of n images to a single master reference image • generation of the n(n-1)/2 interferometric combinations • Automated corrections (orbital fringes, topography) • Unwrapping and normalization • Combination into a mean velocity map • Reordering in time by a using a Least-squares adjustment (adapted from Usai, IGARSS 2000) • Detection and quantification of subtle deformation events • Automated detection of non linear deformation events • Results are consistents with a Permanent Scatterers approach Land Use Planning and Natural Risk Division >2

  3. Temporal evolution of the deformations PARIS • Derivation of time series, showing deformation several events within Paris • Much more on the Poster !!! Land Use Planning and Natural Risk Division >2

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