A method for minimising of low frequency and unwrapping artefacts from interferometric calculations |
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| Authors: | P Elias C Kontoes O Sykioti A Avallone S Van Gorp P Briole |
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| Affiliation: | 1. National Observatory of Athens , Institute for Space Applications and Remote Sensing , Metaxa and Vas. Pavlou Str. 15236 Palaia Penteli, Athens, Greece pelias@space.noa.gr;3. National Observatory of Athens , Institute for Space Applications and Remote Sensing , Metaxa and Vas. Pavlou Str. 15236 Palaia Penteli, Athens, Greece;4. Istituto Nazionale di Geofisica e Vulcanologia , Centro per la Sismologia e Ingegneria Sismica , Via Castello D'Aquino, 83035 Grottaminarda (AV);5. Institut de Physique de Globe de Paris , Departement de Sismologie , 4, place Jussieu, 75252 Paris cedex 05, France |
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| Abstract: | On 7 September 1999 a magnitude MW = 5.9 earthquake occurred in the Athens area of Greece producing a subsidence of 6–7 cm detected by radar interferometry. This study introduces a processing technique, which produces a clear deformation pattern of the earthquake, mostly released from artefacts due to orbital effects, unwrapping cycle slipping errors and atmospherics disturbances. A set of 17 ERS‐1 and ERS‐2 SAR images acquired between December 1997 and January 2001 has been used. The contribution of each artefact to the interferograms was calculated, both in the frequency and spatial domains. |
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