Instructions for creating a Sentinel-1 interferogram using the ESA S1TBX.
Adapted from coursework developed by Franz J Meyer, Ph.D., Alaska Satellite Facility
Using InSAR (Interferometric Synthetic Aperture Radar) techniques, scientists are able to measure centimeter-scale deformation of the Earth by comparing satellite images taken a few days to a few years apart.
InSAR is a technique for mapping ground deformation using radar images of the Earth's surface that are collected from orbiting satellites. Unlike visible or infrared light, radar waves penetrate most weather clouds and are equally effective in darkness. InSAR processing exploits the difference between the phase signals of repeated SAR acquisitions to analyze the shape and deformation of the Earth surface. The principles and concepts of Interferometric SAR (InSAR) processing are not covered in this tutorial, but may be found in the literature listed in Appendix A.
The European Space Agency’s Sentinel-1A and Sentinel-1B C-band SAR sensors are delivering repeated SAR acquisitions with a predictable observation rate, providing an excellent basis for environmental analyses using InSAR techniques.
Deformation fringes related to the 2016 Kumamoto Earthquake show clearly after multi-looking and phase filtering were applied. Contains modified Copernicus Sentinel data 2016, processed by ESA.