InSAR monitoring

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InSAR (Interferometric Synthetic Aperture Radar) is a system designed to monitor changes in critical infrastructure, buildings, and structures using radar images of the Earth's surface obtained from satellites orbiting our planet.

Unlike visible or infrared light, radar waves penetrate most clouds and are equally effective in clear weather, poor weather, darkness, rain, dust storms, smog and fog. Thus, using InSAR, it is possible to monitor soil deformation even in bad weather and at night.

These advantages make InSAR indispensable for certain areas.

Two radar images of the same area, taken at different times from similar vantage points in space, can be compared with each other. Any movement of the earth's surface towards or away from a satellite can be measured and displayed as a "picture" - not of the surface itself, but of how much the surface has moved (deformed) in the time between images. Monitoring images are provided by the space agencies of Italy, Germany, Canada, Japan, Korea, Europe and the USA.

InSAR significantly expands the capabilities of geotechnical monitoring.