GMTSAR processing example for NISAR RSLC InSAR pair over Erta Ale volcano (LA/LB)

This repository provides a small, reproducible GMTSAR (master) processing example for a NISAR RSLC interferometric pair over the Erta Ale volcano (Ethiopia), including both LA and LB products. The package contains GMTSAR configuration files, the DEM used for processing, selected key outputs (coherence/correlation, wrapped phase, unwrapped phase/LOS displacement, and phase-gradient products), and a runnable bash script documenting the end-to-end workflow (download → coregistration → interferogram generation → optional ROI unwrapping → geocoding). The dataset is intended as a quick-start community example for validating NISAR support in GMTSAR and for teaching/benchmarking purposes. Note that ionospheric correction is not applied in this release; for challenging L-band cases (low coherence, long temporal baselines, disturbed ionosphere), additional ionospheric mitigation (e.g., split-spectrum approaches) may be required.