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Authors: Merryman Boncori, J. P.* 
Pezzo, G.* 
Title: Measuring the north-south coseismic displacement component with high-resolution multi aperture InSAR
Issue Date: 2015
Series/Report no.: /27 (2015)
DOI: 10.1111/ter.12127
Keywords: Crustal Deformation
Multi Aperture Interferometry MAI
L'Aquila Earthquake
Satellite geodesy
Subject Classification04. Solid Earth::04.03. Geodesy::04.03.01. Crustal deformations 
Abstract: Earthquake source inversions based on space-borne Synthetic Aperture Radar interferometry (InSAR) are used extensively. Typically, however, only the line-of-sight (LoS) surface displacement component is measured, which is mainly sensitive to the vertical and E–W deformations, although well-established methods also exist to estimate the flight-path component, which is highly sensitive to the N–S displacement. With high-resolution sensors, these techniques are particularly appealing, because accuracies in the order of 3 cm can be achieved, while retaining spatial resolutions between 45 m and a few km, depending on the required level of filtering. We discuss the application to COSMO-SkyMed SAR imagery of the Spectral Diversity or Multi Aperture Interferometry technique, presenting the first SAR flight-path displacement field associated with the Mw 6.3, 2009 L’Aquila event (central Apennines). Finally, we observe and characterize a previously unknown misregistration pattern.
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