Presentation of the Small Baselin NSBAS Processing Chain on a Case Example : The Etan Deformation Monitoring from 2003 to 2010 Using Envisat Data

Marie-Pierre Doin (1, 2) , Felicity Lodge (3) , Stephane Guillaso (4) , Romain Jolivet (3) , Cécile Lasserre (3) , Gabriel Ducret (2, 1) , Raphael Grandin (1, 2) , Erwan Pathier (3) , Virginie Pinel (3)

1 LGENS - Laboratoire de géologie de l'ENS
2 ENS-PSL - École normale supérieure - Paris
3 ISTerre - Institut des Sciences de la Terre
4 T.U. BERLIN - Computer Vision and Remote Sensing

We assemble a processing chain that handles InSAR computation from raw data to time series analysis. A large part of the chain (from raw data to geocoded unwrapped interferograms) is based on ROI PAC modules (Rosen et al., 2004), with original routines rearranged and combined with new routines to process in series and in a common radar geometry all SAR images and interferograms. A new feature of the software is the range-dependent spectral filtering to improve coherence in interferograms with long spatial baselines. Additional components include a module to estimate and remove digital elevation model errors before unwrapping, a module to mitigate the effects of the atmospheric phase delay and remove residual orbit errors, and a module to construct the phase change time series from small baseline interferograms (Berardino et al. 2002). This paper describes the main elements of the processing chain and presents an example of application of the software using a data set from the ENVISAT mission covering the Etna volcano.

Mots clés: InSAR; SBAS; Time series analysis; Etna

Domaines: Planète et Univers [physics]; Sciences de la Terre

Marie-Pierre Doin, Felicity Lodge, Stephane Guillaso, Romain Jolivet, Cécile Lasserre, et al.. Presentation of the Small Baselin NSBAS Processing Chain on a Case Example : The Etan Deformation Monitoring from 2003 to 2010 Using Envisat Data. Fringe Symposium, Sep 2011, Frascati, Italy. ⟨hal-02185213⟩