Application of Time-Series Sentinel-1A for Land Deformation in Central Aceh, Indonesia

Several decorrelation phenomena of Interferometric Synthetic Aperture Radar
(InSAR) have led researchers to develop various multitemporal InSAR (MT-InSAR) techniques
with the application of time series/stack of images. In this study, we present the land surface
movement monitoring using MT-InSAR techniques in the Central of Aceh-Indonesia, and focus
on the temporal and spatial pattern of uplift and subsidence by using multi InSAR methods such
as Quasi-Persistent Scatterer (Q-PS) and Small Baseline Subset (SBAS). A total of 18 scenes of
Sentinel-1A(S-1A) and 14 scenes of ALOS PALSAR-1(PALSAR-1) images were acquired
between 2018 and 2019, as well as 2007 and 2010, where then the multitemporal methods and
techniques were applied sequentially to a set of those data. The results showed that the either the
S-1A and PALSAR-1 velocity subsidence at Nunang and Musara Alun villages were range from
2.4 to 5.7 and 0.6 to 2.3 mm/year, respectively which corresponded to the results obtained by
other research publication. The deformation in Central Aceh needs continuous monitoring using
InSAR as the place is a landslide prone area because of the nature of the terrain.