InSAR also called Interferometric Synthetic Aperture Radar and is a technique for measuring ground movements. Satellites capture images of the Earth’s surface, and these images can be used to check the movements of the ground surface.
A large number of measurements and weekly monitoring updates provide an insight into an area and the speed of collapse. An unexpected fall of the ground in a small area can be a reason for an investigation.
Smallest ground movement accuracy
The time series shows how the object has moved since the last measurement. Compare measurements in the millimeter range.
InSAR is based on radar reflections from an infrastructure. These measures are not related to any particular physical point on the ground.
Measurements are updated weekly. Discover of deformation or ground movement is always monitored.
What is InSAR data?
Differential interferometric synthetic aperture radar (InSAR) is used to measure displacements on Earth’s surface to a few millimeters or less. InSAR data are largely used to study deformation caused by earthquakes, volcanic eruptions, glacier movements, landslides, and subsidence.
You can download InSAR data from these websites:
What does radar interferometry on satellites see?
Synthetic Aperture Radar (SAR) acquires images of the Earth in the microwave series with wavelengths in the order of millimeters. Electromagnetic waves of this size can penetrate clouds, which makes SAR an all-weather remote sensing system operating day and night.