InSAR data acquired from independent overlapping tracks can be exploited for a reliability assessment of the Persistent Scatterer InSAR (PS-InSAR) technique. This is obtained by means of the datum connection of multiple tracks, simultaneously evaluating the misclosures between multi-track PS-InSAR estimates. Due to a different viewing geometry, many of the detected PS will physically not be the same. However, their estimates may still refer to the same deformation signal. The existence of independent observations of the same deformation signal provides a powerful tool to increase the redundancy and evaluate the reliability. The datum connection can be subdivided in two steps. The first step consists of the conversion of PS locations to a common datum. Secondly, the PS-InSAR parameter estimates (velocities, displacements, heights) are connected. In stead of the conventional approach of separately geocoding each track, we propose the use of a common radar datum defined by the acquisition geometry of the 'master track'. Multi-track datum connection has been applied in the Groningen region, the Netherlands, which is affected by subsidence due to gas extraction with displacement rates up to 7 mm/year. The main reservoir is (partly) visible in 6 independent overlapping ERS tracks from 1992 (ascending and descending). Datum connection resulted in a consistent set of PS-InSAR deformation estimates. Additionally, the deformation signal was decomposed in horizontal and vertical movements, utilizing the different viewing geometries of the tracks. ©2007 IEEE.
Original languageUndefined/Unknown
Title of host publicationProceedings of the IEEE International Geoscience and Remote Sensing Symposium IGARSS 2007
EditorsI. Corbella
Place of PublicationEschborn, Deutschland
PublisherVerbatim
Pages1-4
Number of pages4
Publication statusPublished - 2007
EventSensing and Understanding the Planet - Barcelona, Spain
Duration: 23 Jul 200727 Jul 2007

Publication series

Name
PublisherVerbatim

Conference

ConferenceSensing and Understanding the Planet
CountrySpain
CityBarcelona
Period23/07/0727/07/07

    Research areas

  • conference contrib. refereed, Conf.proc. > 3 pag

ID: 3228024