Terrain observation by progressive scan (TOPS) antenna beam steering is utilized for European Space Agency’s (ESA’s) Sentinel-1 synthetic aperture radar (SAR) sensor for the interferometric wide swath (IW) and extra wide swath (EW) modes. As a consequence of the azimuth steering, the resulting signal characteristics have to be accounted for in SAR interferometric (InSAR) processing. This paper assesses the performance of speckle tracking and spectral diversity (SD) [also referred to as split spectrum or multi-aperture interferometry (MAI)] when applied to TOPS data acquired over nonstationary scenarios, such as glaciers. The characteristics of the TOPS signal, especially the azimuth-variant Doppler centroid, are discussed with particular consideration of along-track surface motion between the interferometric acquisitions. The TOPS specific coregistration requirements are formulated, followed by an analysis of the theoretical estimation accuracy as a function of the estimation window size. A refined adaptive coregistration approach based on D is suggested. Experimental TerraSAR-X TOPS data acquired over the Lambert glacier, Antarctica, are used to validate the proposed speckle tracking and SD methodologies.


    Access

    Download


    Export, share and cite



    Title :

    Speckle Tracking and Interferometric Processing of TerraSAR-X TOPS Data for Mapping Nonstationary Scenarios


    Contributors:


    Publication date :

    2015



    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




    Speckle Tracking and Interferometric Processing of TerraSAR-X TOPS Data for Mapping Nonstationary Scenarios

    Scheiber, Rolf / Jäger, Marc / Prats, Pau et al. | German Aerospace Center (DLR) | 2015

    Free access

    TOPS Differential SAR Interferometry with TerraSAR-X

    Marotti, L. / Prats, P. / Scheiber, R. et al. | British Library Conference Proceedings | 2012


    TOPS Imaging with TerraSAR-X: Mode Design and Performance Analysis

    Meta, Adriano / Mittermayer, Josef / Prats, Pau et al. | German Aerospace Center (DLR) | 2010

    Free access

    Differential SAR Interferometry with TerraSAR-X TOPS Data: Mexico City Subsidence Results

    Marotti, Luca / Prats, Pau / Scheiber, Rolf et al. | German Aerospace Center (DLR) | 2012

    Free access

    First TerraSAR-X TOPS Mode Antenna Pattern Measurements Using Ground Receivers

    Castellanos Alfonzo, Gabriel / Schwerdt, Marco / Wollstadt, Steffen et al. | Tema Archive | 2013