Time Series InSAR for Ground Deformation Observation in Semarang Area, Central Java

Agustan Agustan, Rachmadhi Purwana, Budi Heru Santosa, Takeo Ito, Ruki Ardiyanto, Heri Sadmono

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The initiatives of open data and open platforms, combined with on-demand data processing in Synthetic Aperture Radar (SAR), enable more straightforward and accessible ground deformation research worldwide. The Alaska Satellite Facility Distributed Active Archive Center (ASF DAAC) provides high-quality interferogram combination pairs based on the Small Baseline Subset (SBAS) technique and on-demand InSAR data analysis known as HyP3. HyP3 offers unwrapped phase data from Sentinel-1 satellites and other derived products that can be utilized with open-source deformation software such as Mintpy. This research aims to assess the quality of interferogram combination pairs by configuring networks of perpendicular and temporal baselines for observing ground deformation in Semarang, Central Java, Indonesia. The study demonstrates that HyP3 products enable time series analysis to determine deformation rates. Over 8.4 years, from November 15th, 2014, to April 14th, 2023, the Simpang Lima landmark in Semarang experienced an approximate subsidence rate of -0.87 cm/year. However, the maximum subsidence rate of approximately 11 cm/year was observed in the southeastern part of Semarang.

Original languageEnglish
Title of host publicationAPSAR 2023 - 2023 8th Asia-Pacific Conference on Synthetic Aperture Radar
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9798350393590
DOIs
Publication statusPublished - 2023
Event8th Asia-Pacific Conference on Synthetic Aperture Radar, APSAR 2023 - Bali, Indonesia
Duration: 23 Oct 202327 Oct 2023

Publication series

NameAPSAR 2023 - 2023 8th Asia-Pacific Conference on Synthetic Aperture Radar

Conference

Conference8th Asia-Pacific Conference on Synthetic Aperture Radar, APSAR 2023
Country/TerritoryIndonesia
CityBali
Period23/10/2327/10/23

Keywords

  • HyP3
  • InSAR
  • Semarang
  • subsidence
  • time series

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