Atmospheric Artifacts Compensation for InSAR by Using Global and Local Numerical Weather Prediction Models

Abstract:
Atmospheric artifacts, due to spatial and temporal variations of atmosphere state, often pose a noise signal to interferograms and further affect the application of InSAR techniques. State-of-the-art research works have revealed atmospheric artifacts can be partially compensated with global and local numerical weather prediction models. In this paper, a realistic integration method has been used based on the latest global reanalysis ERA5 data and the latest local Weather Research and Forecasting (WRF) prediction model to correct atmospheric artifacts in interferograms. A detailed comparison of their correction performance has been carried out in Tenerife and Almería test sites in Spain, and Crete in Greece with Sentinel-1 data. The comparison analysis has demonstrated that the global ERA5 data outperforms the local WRF model.