Due to the precautions taken by the Romanian authorities in order to mitigate the spread of the COVID-19 virus, this event programmed originally as part of the Eyes’ on Earth Roadshow in Bucharest, will be held fully online.
This demonstration will introduce the concept and capabilities of spaceborne InSAR to detect and monitor terrain motion with Sentinel-1 data using the ESA SNAP Toolbox. Spaceborne InSAR is a radar satellite-based technique providing precise and spatially continuous information on terrain motion over large areas. The Copernicus Sentinel-1 mission, specifically designed to collect interferometric SAR data, is opening new challenges and opportunities and increases the efficiency of the interferometric analysis process for different applications, due to the capability of performing frequent acquisitions.
Land subsidence in Mexico City is caused by groundwater overexploitation because the city is partially built on the area of former Texcoco lake and rests on heavily saturated clay which collapses with water extraction. Over the last century, subsidence reached more than 9 meters, resulting in damages to buildings, streets, sidewalks, sewers, storm water drains and other infrastructure. Previous InSAR studies using ERS data showed a maximum subsidence rate larger than 30 cm/year over parts of the city, whereas current rates assessed with Sentinel-1 data approximate 2.5 cm/month.
This demonstration, presented as a webinar, is opened to all the participants previously registered to the Copernicus “Eyes on Earth” Roadshow and all other interested participants. It will be followed by a Q&A session to interact with the attendees.
For more information and for application please visit our training Web site.