Learn how to phase unwrap an interferogram.
Adapted from ESA http://step.esa.int/main/doc/tutorials/
While an interferogram's fringes show topography or deformation, the height change between fringes is ambiguous. The phase is only known within 2π. Phase unwrapping resolves the uncertainty and allows displacement values to be derived from the product.
This recipe is a follow-up to the "Generate InSAR with Sentinel-1 Toolbox" recipe. In order to complete this recipe with the data provided, you must first go through the steps of the aforementioned recipe.
The unwrapped phase image above of the 2016 Kumamoto Earthquake shows displacement clearly after multi-looking and phase filtering were applied. Contains modified Copernicus Sentinel data 2016, processed by ESA.