TITLE:
Long-Term Land Deformation Monitoring Using Quasi-Persistent Scatterer (Q-PS) Technique Observed by Sentinel-1A: Case Study Kelok Sembilan
AUTHORS:
Pakhrur Razi, Josaphat Tetuko Sri Sumantyo, Daniele Perissin, Hiroaki Kuze
KEYWORDS:
Interferometry, Synthetic Aperture Radar, Land Deformation, Q-PS Technique, Kelok Sembilan
JOURNAL NAME:
Advances in Remote Sensing,
Vol.7 No.4,
December
14,
2018
ABSTRACT:
Located on the mountainous area, Kelok Sembilan
flyover area in West Sumatra, Indonesia has a long history of land deformation,
therefore monitoring and analyzing as continuously is a necessity to minimize
the impact. Notably, in the rainy season, the land deformation occurs along
this area. The zone is crucial as the center of transportation connection in
the middle of Sumatra. Quasi-Persistent Scatterer (Q-PS) Interferometry
technique was applied for extracting information
of land deformation on the field from time to time. Not only does the method
have high performance for detecting land deformation but also improve the
number of PS point, especially in a non-urban area. This research supported by
90 scenes of Sentinel-1A (C-band) taken from October 2014 to November 2017 for
ascending and descending orbit with VV and VH polarization in 5 × 20 m (range × azimuth) resolution. Both satellite orbits detected two critical
locations of land deformation namely as zone A and Zone B, which located in
positive steep slope where there is more than 500 mm movement in the Line of
Sight (LOS) during acquisition time. Deformations in the vertical and
horizontal direction for both zone, are 778.9 mm, 795.7 mm and 730.5 mm, 751.7
mm, respectively. Finally, the results were confirmed by ground truth data
using Unmanned Aerial Vehicle (UAV) observation.