The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
Download
Publications Copernicus
Download
Citation
Articles | Volume XL-1/W5
Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XL-1/W5, 313–317, 2015
https://doi.org/10.5194/isprsarchives-XL-1-W5-313-2015
Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XL-1/W5, 313–317, 2015
https://doi.org/10.5194/isprsarchives-XL-1-W5-313-2015

  11 Dec 2015

11 Dec 2015

LAKE URMIA BRIDGE STABILITY ASSESSMENT: RESULTS FROM TERRASAR-X SPOTLIGHT MODE IMAGES

F. Hosseini1, M. Motagh2, S. Vajedian1, and M. A. Sharifi1 F. Hosseini et al.
  • 1Department of Surveying and Geospatial Engineering, University of Tehran, Tehran, Iran
  • 2GFZ German Research Centre for Geosciences, Department of Geodesy and Remote Sensing,14473 Potsdam, Germany

Keywords: Urmia Bridge, TSX SpotLight, TanDEM-X, thermal dilation

Abstract. In this study we investigate stability of Lake Urmia bridge, locally also known as Shahid Kalantari’s highway bridge, in northwest of Iran using high-resolution satellite radar imagery. The radar dataset includes 22 SAR images acquired in SpotLight mode from 2014 to 2015 in an ascending orbit by TerraSAR-X satellite. A high-resolution Digital Elevation Model (DEM) of the area was constructed from a pair of TanDEM-X bi-static data on June 2012 to remove the effect of topography from interferometry observations. The analysis of X-band interferograms shows high number of displacement fringes, which are interpreted as being caused by thermal dilation due to temperature differences in the imaged area between two SAR acquisitions. This effect, which can often be observed in single interferograms, have important impact on time-series products and should be considered for deformation analysis of bridge structures.