InSAR is a remote sensing technique that uses radar signals to generate precise measurements of the Earth's surface, capturing changes in elevation or deformation over time. By comparing two or more radar images of the same area taken at different times, InSAR can detect shifts in the landscape due to natural events like earthquakes or human activities such as subsidence. This technique is rooted in the principles of the electromagnetic spectrum, as it utilizes microwave signals which are part of the radar wavelengths.
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