 Synthetic Aperture Radar Interferometry, NSAR, is a powerful tool for measuring surface deformations caused by natural and human activities. It can provide detailed information about the three-dimensional components of these deformations, allowing researchers to monitor them over time. Recent advances in NSAR technology have made it possible to combine multiple satellite images taken at different frequencies and angles, providing even more accurate measurements. These developments are particularly useful for studying complex geological processes such as volcanoes, landslides, and earthquakes. This article was authored by Antonio Pepe and Fabiana Kahlo.