05-03-2015 05:47 PM CET
europeanspaceagency posted a photo:
A Red Alert has been declared in southern Chile after an eruption at Villarrica Volcano early on 3 March. Thousands of residents in the area have been evacuated for their safety and the International Charter Space & Major Disasters has been activated by Chile's risk management authority ONEMI.
Further to the operational support provided by the Charter, ESA and the DLR German Aerospace Center have teamed up to acquire and process Sentinel-1A imagery illustrating changes at the surface of the volcano. The image is a colour composite of the two Sentinel-1 scans from 20 February and 4 March; changes are visually enhanced by a Normalised Change Index (NCI) and some statistical computations.
This work was performed by DLR in the framework of the ASAPTERRA project originated by ESA.
Sentinel-1A is the first satellite for Europe’s Copernicus programme. With its radar vision, the Sentinel-1 mission provides an all-weather, day-and-night supply of imagery of Earth’s surface.
Although not yet in routine operations, Sentinel-1A currently provides a coverage every 12 days of relevant tectonic areas worldwide and is therefore very suitable to monitor events such as volcanic eruptions.
Credit: Copernicus data/ESA (2015), map produced by Team Remote Sensing Parameters Georisks of DLR
A Red Alert has been declared in southern Chile after an eruption at Villarrica Volcano early on 3 March. Thousands of residents in the area have been evacuated for their safety and the International Charter Space & Major Disasters has been activated by Chile's risk management authority ONEMI.
Further to the operational support provided by the Charter, ESA and the DLR German Aerospace Center have teamed up to acquire and process Sentinel-1A imagery illustrating changes at the surface of the volcano. The image is a colour composite of the two Sentinel-1 scans from 20 February and 4 March; changes are visually enhanced by a Normalised Change Index (NCI) and some statistical computations.
This work was performed by DLR in the framework of the ASAPTERRA project originated by ESA.
Sentinel-1A is the first satellite for Europe’s Copernicus programme. With its radar vision, the Sentinel-1 mission provides an all-weather, day-and-night supply of imagery of Earth’s surface.
Although not yet in routine operations, Sentinel-1A currently provides a coverage every 12 days of relevant tectonic areas worldwide and is therefore very suitable to monitor events such as volcanic eruptions.
Credit: Copernicus data/ESA (2015), map produced by Team Remote Sensing Parameters Georisks of DLR
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