ADTC-InSAR: a tropospheric correction database for Andean volcanoes

Abstract

Monitoring geophysical hazards requires a near real-time response and precise interpretation of InSAR data, typically recording minute surface deformations. Accurate tropospheric adjustment is an essential aspect of InSAR processing. This study provides a free database of ready-to-use Tropospheric Correction for InSAR for the three volcanic zones from north to south of the Andes. Average Daily Tropospheric Correction for InSAR (ADTC-InSAR) is a collection of average daily tropospheric delay matrices created using ECMWF re-analysis of the global atmosphere and surface conditions (ERA5) as atmospheric data and TRAIN software. The construction method and annual variation according to the climatic zones are provided, and its effectiveness is evaluated. ADTC-InSAR facilitates the generation of tropospheric corrections in InSAR with easy access, fast application, and accuracy comparable to TRAIN. Its purpose is to serve as a starting point for tropospheric correction in the event of emergency response to extreme occurrences and as a reference for other research and academic objectives.