GMTSAR installation and processing Guide - Practical InSAR handbook series

Interferometric Synthetic Aperture Radar (InSAR) uses the pairwise phase difference of SAR images to estimate the amount of deformation and displacement of the earth's surface. InSAR technique is used to estimate the displacement caused by earthquakes, volcanoes, subsidence, and settlement. InSAR has good spatial accuracy and density compared to other methods of estimating surface changes, such as the global positioning system (GPS). It is also economically acceptable due to its time and cost savings. Interpreting the results of InSAR requires the processing of SAR images by SAR image processing software. GMTSAR software is written the C Programming Language by Sandwell, D. et al. This software has high speed in processing SAR images and can process SAR products such as Envisat, ALOS-1, TerraSAR-X, COSMOS-SkyMed, Sentinel-1, and ALOS-2. This software is open-source (GNU General Public License) that can be used to process Small Baseline Subset (SBAS) time-series This book is written in two major general chapters. In the first chapter, we will show step by step how to install GMTSAR software and other software on Ubuntu 20.04 is taught. Also, in this chapter, download the necessary data such as Sentinel-1 images, and DEM is taught. In the second part, which is the main chapter of the book, the processing of the Sentinel-1 images with GMTSAR software is explained. First of all, the process of processing two earthquake-related images using the DInSAR technique is explained so that the user can obtain the amount of displacement caused by the earthquake with this technique. The SBAS time-series is then processed using GMTSAR software to estimate time series ground deformation determine the rate of subsidence of the earth's crust.