Validation of the Tropospheric Corrected Interferograms and Analysis of the expected Performance in Deformation Rate Estimation

Previous studies have shown that a consistent reduction of tropospheric-related phase biases can be introduced mitigating the interferometric phase using numerical weather models. The work investigates the achieved accuracy of the tropospheric corrections and their effects on deformation rates estimation using GNSS data. The GNSS derived Zenith Path Delay is used to assess if the corrected interferogram reaches the expected numerical weather models accuracy. Then the GNSS derived deformation rates are compared with DInSAR results to validate their expected accuracy.