PS Point Selection in PS-InSAR Data Processing

When performing PS-InSAR data processing, it is crucial to note that the selection of Persistent Scatterer (PS) points is of paramount importance. The PS point selection process involves consideration of multiple factors such as terrain characteristics, spatial coverage, and temporal coverage duration. Additionally, multi-step data processing is required, including interferogram generation, phase noise filtering, and time series analysis. In code implementation, this typically involves using amplitude dispersion analysis algorithms to identify stable scatterers, with key functions calculating phase stability thresholds and temporal coherence metrics. All these processing steps require careful execution to ensure the final generated surface deformation data is accurate and reliable. The implementation often utilizes statistical methods to filter candidate points and employs phase unwrapping algorithms to resolve ambiguity in deformation measurements.