The Influence of Parameter Estimation Bounds on Velocity Estimation in PSInSAR

Permanent scatterer interferometric synthetic aperture radar (PSInSAR) processing requires parameter selection that can significantly impact results, yet these parameters are often not fully disclosed in scientific publications. To demonstrate how different parameter settings in PSInSAR processing affect results, our study analyzed PSInSAR processing results using varying parameters. Results were evaluated both with and without temporal coherence filtering (threshold >= 0.8). Parameter variations produced differences that exceeded previously stated accuracy ranges for PSInSAR methods, while overall deformation trends remained similar across parameter sets. This shows that even seemingly minor parameter variations can lead to significant differences in PSInSAR results, exceeding what would be considered acceptable with respect to previously published accuracies. These findings emphasize the need for complete parameter disclosure in scientific publications and suggest more careful interpretation of small velocity differences in PSInSAR results.