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ADTC-InSAR: a tropospheric correction database for Andean volcanoes
Fernanda Lopez-Pozo1, Rodrigo Abarca-Del-Rio2, Luis E Lara3,4
1Doctorado en Ciencias Geológicas, Departamento de Ciencias de la Tierra, Facultad de Ciencias Químicas, Universidad de Concepción, Concepción, Chile. fernandalopez@udec.cl.
A new database, Average Daily Tropospheric Correction for InSAR (ADTC-InSAR), offers readily available tropospheric delay data for Andean volcanic zones. This tool aids in precise InSAR processing for geophysical hazard monitoring.
Area of Science:
- Geophysics
- Remote Sensing
- Volcanology
Background:
- Geophysical hazard monitoring relies on near real-time InSAR data analysis.
- Accurate tropospheric correction is critical for interpreting InSAR-measured surface deformations.
- Existing methods can be time-consuming for rapid response scenarios.
Purpose of the Study:
- To introduce a free, accessible database of tropospheric corrections for InSAR in Andean volcanic zones.
- To provide a tool for faster and more efficient InSAR processing.
- To support emergency response and academic research related to geophysical hazards.
Main Methods:
- Utilized ECMWF re-analysis data (ERA5) for atmospheric conditions.
- Employed TRAIN software to generate average daily tropospheric delay matrices.
- Developed the Average Daily Tropospheric Correction for InSAR (ADTC-InSAR) database.
Main Results:
- Created a database of ready-to-use tropospheric correction matrices for three Andean volcanic zones.
- Demonstrated the construction method and annual variations within climatic zones.
- Validated the accuracy of ADTC-InSAR, showing comparability to existing methods like TRAIN.
Conclusions:
- ADTC-InSAR offers an accessible, fast, and accurate solution for tropospheric correction in InSAR.
- The database serves as a valuable resource for immediate geophysical hazard response and scientific studies.
- Facilitates improved surface deformation analysis in volcanic regions.
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