Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2017, Vol. 14, No. 7, pp. 77-85
Estimation of vertical and horizontal displacements at Kolskaya GMK tailing dam using SAR data
1 Immanuel Kant Baltic Federal University, Kaliningrad, Russia
Accepted: 03.11.2017
DOI: 10.21046/2070-7401-2017-14-7-77-85
The main goal of the paper is to demonstrate effectiveness of SAR interferometry as an independent instrument for ground surface local displacements assessment by the example of the tailing dam of Kolskaya mining company. Monitoring of ore mining and processing enterprise areas is conducted regularly and includes engineering, geological and geodetic works. Earth radar sensing data have a huge potential for resolving tasks of ground surface dynamics control. Satellite interferometry method is based on mathematical processing of multi-temporal radar images obtained from repeat acquisitions of area of interest. The research work included processing of 44 scenes acquired from ascending and descending passes of Sentinel-1A for the period 2015–2016 using persistent scatterers interferometry technique. TOPSAR mode is a feature of Sentinel-1A which provides medium spatial resolution data and wide swath. Results of interferometric processing of radar images acquired from two directions and information about sensing geometry make it possible to assess vertical and horizontal (west-east) displacements components. Results of post-processing permitted to extract vertical and horizontal displacement components. The conducted research work proves effectiveness of multi-temporal radar data for monitoring hydraulic structures local displacements. Further joint use of Sentinel-1A/B/C/D radars will decrease the repeat passes period down to 2 days, increase source data volume and help obtaining more precise results. That points out the potential of Earth remote sensing methods.
Keywords: synthetic aperture radar, radar interferometry, ground surface displacements, persistent scatterers interferometry, hydraulic structures, tailings dam, Kolskaya GMK
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