Combining Insar, levelling and GNSS for the estimation of 3D surface displacements

T. Fuhrmann, M. Caro Cuenca, A. Knöpfler, F.J. van Leijen, M. Mayer, M. Westerhaus, Ramon F. Hanssen, B Heck

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

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The three geodetic techniques InSAR, levelling and GNSS are complementary w.r.t. (i) the sensitivity to horizontal and vertical displacement components, (ii) the spatial and temporal resolution of the measurements and (iii) the accuracy of the resulting displacements. We present a strategy to robustly combine the displacement estimates of the three techniques with a focus on long-term, linear movements. The linear displacement rates from InSAR in ascending and descending image geometry are combined with vertical and horizontal rates from levelling and GNSS, respectively, resulting in 3D velocity vectors at a dense surface grid. The results of our combination approach indicate that it is possible to derive realistic surface movements on the sub-mm/a scale with significance.
Original languageEnglish
Title of host publicationProceedings of the Fringe 2015 Workshop
Subtitle of host publicationFrascati, Italy 23–27 March 2015 (ESA SP-731, May 2015)
EditorsL. Ouwehand
PublisherESA Publication
Number of pages8
Publication statusPublished - 2015
EventFringe 2015 workshop, Rome, Italy - Noordwijk
Duration: 23 Mar 201527 Mar 2015


ConferenceFringe 2015 workshop, Rome, Italy


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