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Deformation monitoring of Pidie Jaya earthquake using pairwise logic of multitemporal Sentinel-1 SAR data
Syahreza S.a,b, Siddieq H.H.c, Saepuloh A.c, Mailano I.c
a Department of Physics, Syiah Kuala University (Unsyiah), Banda Aceh, 23111, Indonesia
b Tsunami and Disaster Mitigation Research Center (TDMRC), Unsyiah, Banda Aceh, 23233, Indonesia
c Geothermal Engineering Master Program, Bandung Institute of Technology (ITB), Indonesia
[vc_row][vc_column][vc_row_inner][vc_column_inner][vc_separator css=”.vc_custom_1624529070653{padding-top: 30px !important;padding-bottom: 30px !important;}”][/vc_column_inner][/vc_row_inner][vc_row_inner layout=”boxed”][vc_column_inner width=”3/4″ css=”.vc_custom_1624695412187{border-right-width: 1px !important;border-right-color: #dddddd !important;border-right-style: solid !important;border-radius: 1px !important;}”][vc_empty_space][megatron_heading title=”Abstract” size=”size-sm” text_align=”text-left”][vc_column_text]© 2018 Author(s).Interferometric synthetic aperture radar (InSAR) based on radar satellite data has emerged as a powerful technology for observing the Earth’s surface, especially for monitoring the Earth’s topography and deformations. However, it is well known that the InSAR measurements are often significantly affected by the atmosphere. This paper applies the pairwise logic (PWL) and the Differential Interferometric Synthetic Aperture Radar (D-InSAR) technique using multitemporal SAR image from Sentinel-1A (S1A). The objective of this study was to investigate the possibility of using PWL in reducing atmospheric delay and improve the results in capturing the deformation signal from the artifact. We stacked twelve pairs of S1A data before and after the December 6, 2016, Mw 6.5 Pidie Jaya earthquake in Aceh, Indonesia. Multitemporal interferograms of S1A in ascending and descending orbits were used to obtain Line of Sight (LOS) motion maps. To generate the differential interferogram of the PWL, then the first and the second interferogram were computed by summation process. Next, the second interferogram was added with the third, until the last interferogram of D-InSAR data pairs. The final data pair summation produced six pairwise interferogram. The results indicated that the summation of interferogram can increase the deformation twice in the line of sight of the satellite which represents movement toward or away from the satellite (e.g. uplift or subsidence), and also eliminated positive and negative signals in the line of sight velocities, which represent the atmospheric phase delay. The PWL simplified the complexity of atmospheric correction in the D-InSAR processing by reducing atmospheric artifact and increasing the deformation signal.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Author keywords” size=”size-sm” text_align=”text-left”][vc_column_text][/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Indexed keywords” size=”size-sm” text_align=”text-left”][vc_column_text][/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Funding details” size=”size-sm” text_align=”text-left”][vc_column_text]The authors gratefully acknowledge the financial support from Syiah Kuala University, Ministry of Research, Technology and Higher Education of the Republic of Indonesia through high-index short term grant: 1445/UN11/SP/PNBP/2017. We would like to thank the colleague who participated in this project. Thanks are also extended to the Faculty of Earth Sciences and Technology-ITB for support in processing data and training. We also would like to thank the ESA for providing the satellite data used in this project.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”DOI” size=”size-sm” text_align=”text-left”][vc_column_text]https://doi.org/10.1063/1.5047383[/vc_column_text][/vc_column_inner][vc_column_inner width=”1/4″][vc_column_text]Widget Plumx[/vc_column_text][/vc_column_inner][/vc_row_inner][/vc_column][/vc_row][vc_row][vc_column][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][/vc_column][/vc_row]