A multi-temporal InSAR method incorporating both persistent scatterer and small baseline approaches

Details A multi-temporal InSAR method incorporating both persistent scatterer and small baseline approaches A multi-temporal InSAR method incorporating both persistent scatterer and small baseline approaches

Aug 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3516302h&link_type=abstract

Geophysical Research Letters, Volume 35, Issue 16, CiteID L16302

Physics

12

Geodesy And Gravity: Satellite Geodesy: Technical Issues (6994, 7969), Geodesy And Gravity: Transient Deformation (6924, 7230, 7240), Geodesy And Gravity: Integrations Of Techniques, Radio Science: Interferometry (1207, 1209, 1242), Volcanology: Remote Sensing Of Volcanoes

Scientific paper

Synthetic aperture radar (SAR) interferometry is a technique that provides high-resolution measurements of the ground displacement associated with many geophysical processes. Advanced techniques involving the simultaneous processing of multiple SAR acquisitions in time increase the number of locations where a deformation signal can be extracted and reduce associated error. Currently there are two broad categories of algorithms for processing multiple acquisitions, persistent scatterer and small baseline methods, which are optimized for different models of scattering. However, the scattering characteristics of real terrains usually lay between these two end-member models. I present here a new method that combines both approaches, to extract the deformation signal at more points and with higher overall signal-to-noise ratio than can either approach alone. I apply the combined method to data acquired over Eyjafjallajökull volcano in Iceland, and detect time-varying ground displacements associated with two intrusion events.

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