InSAR data acquired from independent overlapping tracks can be exploited for a reliability assessment of the Persistent Scatterer InSAR (PS-InSAR) technique. Here we present a mathematical framework for the datum connection of multiple tracks, simultaneously evaluating the precision and reliability of PS-InSAR estimates. This datum connection can be subdivided in two steps. Firstly, the PS locations are converted to a common radar coordinate system: the geometry of the so-called 'master track'. The second step consists of the connection of the PS-InSAR parameter estimates (velocities, displacements, heights). Since each track has its own reference PS, the transformation is parameterized as a translation, which can be optionally extended with a trend in range and azimuth direction due to unmodeled residual effects. 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 (ascending and descending). Utilizing the different viewing geometries, the connected PSInSAR estimates could be further decomposed into horizontal and vertical displacement rates.
Original languageEnglish
Title of host publicationProceedings of Envisat Symposium, Montreux, Switzerland, 23-27 April 2007
EditorsH. Lacoste, L. Ouwehand
Place of PublicationNoordwijk
PublisherESA communication Production Office, ESTEC
Pages1-6
Number of pages6
ISBN (Print)92-921-200-1
Publication statusPublished - 2007
EventEnvisat Symposium, Montreux, Switzerland, 23-27 April 2007 - Montreux, Switzerland
Duration: 23 Apr 200727 Apr 2007

Publication series

Name
PublisherESA Communication Production Office, ESTEC

Conference

ConferenceEnvisat Symposium, Montreux, Switzerland, 23-27 April 2007
CountrySwitzerland
CityMontreux
Period23/04/0727/04/07

ID: 2678992