High-precision 3D geologication of persistent scatterers with one single-epoch GCP and lidar DSM data

Mengshi Yang, Prabu Dheenathayalan, Ling Chang, Jinhu Wang, Roderik C. Lindenbergh, Mingsheng Liao, Ramon F. Hanssen

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademic


In persistent scatterer (PS) interferometry, the relatively poor 3D geolocalization precision of the measurement points (the scatterers) is still a major concern. It makes it difficult to attribute the deformation measurements unambiguously to (elements of) physical objects. Ground control points (GCP's), such as corner reflectors or transponders, can be used to improve geolocalization, but only in the range-azimuth domain. Here, we present a method which uses only one GCP, visible in only one single radar acquisition, in combination with a digital surface model (DSM) data to improve the geolocation precision, and to achieve an object snap by projecting the scatterer position to the intersection with the DSM model, in the metric defined by the covariance matrix (i.e. error ellipsoid) of every scatterer.
Original languageEnglish
Title of host publicationLiving Planet Symposium, Proceedings of the conference
Subtitle of host publicationPrague, Czech Republic
EditorsL. Ouwehand
PublisherEuropean Space Agency (ESA)
Number of pages4
ISBN (Electronic)978-92-9221-305-3
Publication statusPublished - 2016
Externally publishedYes
EventEuropean Space Agency Living Planet Symposium 2016 - Prague, Czech Republic
Duration: 9 May 201613 May 2016


ConferenceEuropean Space Agency Living Planet Symposium 2016
Country/TerritoryCzech Republic
Internet address


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