title: A Methodology to Validate the InSAR Derived Displacement Field of the September 7th, 1999 Athens Earthquake Using Terrestrial Surveying. Improvement of the Assessed Deformation Field by Interferometric Stacking.
abstract: The primary objective of this paper is the evaluation of the InSAR derived displacement field caused by the 07/09/1999 Athens earthquake, using as reference an external data source provided by terrestrial surveying along the Mornos river open aqueduct. To accomplish this, a processing chain to render comparable the leveling measurements and the interferometric derived measurements has been developed. The distinct steps proposed include a solution for reducing the orbital and atmospheric interferometric fringes and an innovative method to compute the actual InSAR estimated vertical ground subsidence, for direct comparison with the leveling data. Results indicate that the modeled deformation derived from a series of stacked interferograms, falls entirely within the confidence interval assessed for the terrestrial surveying data.
authors.affiliation: Higher Geodesy Laboratory and Dionyssos Satellite Observatory, National Technical University of Athens, Iroon Polytexneiou 9, 15780, Zografou, Greece. jkotsis@survey.ntua.gr.
authors.forename: Ioannis
authors.initials: I
authors.lastname: Kotsis
authors.affiliation: National Observatory of Athens, Institute of Space Applications and Remote Sensing, Vas. Pavlou and Metaxa str., 15236, Palaia Penteli, Greece. kontoes@space.noa.gr.
authors.forename: Charalabos
authors.initials: C
authors.lastname: Kontoes
authors.affiliation: Higher Geodesy Laboratory and Dionyssos Satellite Observatory, National Technical University of Athens, Iroon Polytexneiou 9, 15780, Zografou, Greece. dempar@central.ntua.gr.
authors.forename: Dimitrios
authors.initials: D
authors.lastname: Paradissis
authors.affiliation: Higher Geodesy Laboratory and Dionyssos Satellite Observatory, National Technical University of Athens, Iroon Polytexneiou 9, 15780, Zografou, Greece. karamits@central.ntua.gr.
authors.forename: Spyros
authors.initials: S
authors.lastname: Karamitsos
authors.affiliation: National Observatory of Athens, Institute of Space Applications and Remote Sensing, Vas. Pavlou and Metaxa str., 15236, Palaia Penteli, Greece. pelias@space.noa.gr.
authors.forename: Panagiotis
authors.initials: P
authors.lastname: Elias
authors.affiliation: National Observatory of Athens, Institute of Space Applications and Remote Sensing, Vas. Pavlou and Metaxa str., 15236, Palaia Penteli, Greece. ipapoutsis@space.noa.gr.
authors.forename: Ioannis
authors.initials: I
authors.lastname: Papoutsis
keywords: Ground subsidence; SAR Interferometry; leveling.; stacked interferogram