ESA - Observing the Earth - Benefiting Our Economy - Double views from ERS tandem mission adding depth to Canadian wilderness maps

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Double views from ERS tandem mission adding depth to Canadian wilderness maps

14 February 2006

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3D visualisation of InSAR derived elevation data on Baffin Islan

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3D visualisation of InSAR derived elevation data on Baffin Island, Canada. InSAR is a technique of combining two or more Synthetic Aperture Radar (SAR) images of the same site acquired from close to the same position in order to obtain extremely precise information on topography as well as any surface changes occurring between acquisitions.

Credits: Vexcel Canada

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ERS in orbital configuration. ERS-1 and -2 have generated about 1.5 million SAR scenes, and upwards of 3500 scientists have published more than 30 000 scientific papers based on ERS data.

Credits: EADS Astrium

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Mapping project area: overview of recent progress

Credits: CTI

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3D visualisation of InSAR derived elevation data on Baffin Island

Credits: Vexcel Canada

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ERS-derived images of the volcano Etna in Italy, summer 2001. Using precise techniques known as SAR Interferometry (InSAR), researchers have been able to monitor the movements of Etna for over 10 years including the eruption in 1993. A digital terrain model of the volcano and measurements of geophysical parameters, such as the volcanic mouth deflation, were already generated in 1995 by making use of complex interferometric techniques applied to ERS SAR images. ERS-2 SAR image data were then collected and processed to analyse the 2001 eruption.