Time series analysis of L-band PALSAR-2 images in Istanbul and Kocaeli,Turkey  

作　　者：Sadra Karimzadeh Abdullah Can Zulfikar Masashi Matsuoka 

机构地区：[1]Department of Remote Sensing and GIS,University of Tabriz,Tabriz,Iran [2]Department of Architecture and Building Engineering,Tokyo Institute of Technology,Yokohama,Japan [3]Disaster Management Institute,Istanbul Technical University,Maslak,Istanbul,Turkey

出　　处：《Big Earth Data》2024年第3期467-493,共27页地球大数据（英文）

基　　金：funded by the TUBITAK#2221 project and the University of Tabriz,and the Japanese Society for the Promotion of Science(JSPS)Grants-in-Aid for Scientific Research(KAKENHI);grant number#23H01654。

摘　　要：ABSTRACT Conducting long measurements of infrastructure deformation is a critical engineering task.Conventional methods are both timeconsuming and expensive,limiting their use for large-scale applica-tions.The synergy of synthetic aperture radar(SAR)and geographic information systems(GIS)offers a complementary approach.This study focuses on the feasibility of using time series analysis of L-band PALSAR-2 images to discover land displacements in Istanbul and Kocaeli,significant industrial and residential areas in Turkey.PALSAR-2 phase and intensity information were analyzed.For phase analysis,14 L-band images from 2014 to 2021 were taken into account.Small baseline subset(SBAS)analysis was performed using 44 pairs,and results of the velocity,coherence and back-scattering values are presented.Coherence of all pairs and their correlations were calculated.Principal Component Analysis(PCA)reduced the dimension of coherence pairs,enhancing feature extraction and the final geocoded velocity map revealed a fastest subsidence rate of−58 mm/yr and a mean subsidence of−20 mm/yr.These findings were confirmed through mean vertical velocity from Sentinel-1 datasets and field observations.The results showed that immature land subsidence in the mentioned areas are growing slowly,which can be taken as a serious risk in future.

关 键 词：InSAR time series PALSAR-2 SAR intensity infrastructure deformation 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]