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Atmospheric phase screen compensation in ground-based sar with a multiple-regression model over mountainous regions
Iglesias González, Rubén; Fabregas Canovas, Francisco Javier; Aguasca Solé, Alberto; Mallorquí Franquet, Jordi Joan; López Martínez, Carlos; Gili Ripoll, José Antonio; Corominas Dulcet, Jordi
Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions; Universitat Politècnica de Catalunya. Departament d'Enginyeria del Terreny, Cartogràfica i Geofísica; Universitat Politècnica de Catalunya. RSLAB - Grup de Recerca en Teledetecció; Universitat Politècnica de Catalunya. EGEO - Enginyeria Geomàtica; Universitat Politècnica de Catalunya. MSR - Mecànica del Sòls i de les Roques
In this paper, a new model-based technique for the compensation of severe height-dependent atmospheric artifacts, using ground-based synthetic aperture radar (SAR) data over mountainous regions, is proposed. The method presented represents an extension of already existing techniques, but now taking into account the effect of steep topography in the atmospheric phase screen compensation process. In addition, the technique is adapted to work with polarimetric SAR data, showing, in that case, a noticeable improvement in the compensation process. The method is validated in the mountainous environment of El Forn de Canillo, located in the Andorran Pyrenees, where there is a slow-moving landslide that nowadays is being reactivated coinciding with strong rain episodes. In this framework, ten zero-baseline fully polarimetric data sets have been acquired at X-band during a one-year measurement campaign (October 2010-October 2011) with the GB-SAR sensor developed at the Universitat Politecnica de Catalunya. First, the impact of the severe atmospheric fluctuations among multitemporal GB-SAR measurements is carefully studied and analyzed. Hence, the need to correctly estimate and compensate the resulting phase differences when retrieving interferometric information is put forward in the frame of differential-SAR-interferometry applications.
Peer Reviewed
Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Radar
Syntethic aperture radar
Interferometry
Polarimetry
Atmospheric phase screen (APS) compensation
Differential synthetic aperture radar (SAR) interferometry (DInSAR)
Ground-based SAR (GB-SAR)
Polarimetry
Steep topography
Pixels technique CPT
Radar interferometry
Temporal analysis
Earths surface
Deformation
DINSAR
System
Band
Radar d'obertura sintètica
Interferometria
info:eu-repo/semantics/publishedVersion
Article
Institute of Electrical and Electronics Engineers (IEEE)
         

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