In this guide, we will cover What is an interferogram InSAR?, What is interferometric SAR InSAR useful for?, What is an interferogram?
What is an interferogram InSAR?
An interferogram in INSAR (interferometric synthetic aperture radar) is a visual representation of the phase difference between two radar images of the same area taken at different times. It displays variations in surface displacement by showing phase differences in radar signals reflected from the Earth’s surface. These differences are used to detect and measure changes in surface height or displacement.
What is interferometric SAR InSAR useful for?
Interferometric SAR (INSAR) is useful for monitoring and analyzing surface deformations and displacements over time. It is commonly used for applications such as monitoring subsidence, earthquake deformation, volcanic activity and infrastructure stability. INSAR provides precise measurements of changes in the Earth’s surface by comparing radar images taken at different times.
An interferogram is a graphical representation that shows the interference pattern resulting from the combination of two or more radar signals. It highlights phase variations caused by changes in elevation or surface movement. This model is analyzed to extract information about the movement or deformation of the Earth’s surface.
What is an interferogram?
The function of INSAR is to measure and monitor surface displacements with high precision by analyzing phase differences between radar signals acquired at different times. It enables the detection of subtle changes in the Earth’s surface, which is useful for geological and environmental studies, infrastructure monitoring and natural hazard assessment.
The principle of INSAR consists of comparing radar images of the same area taken at different times. By analyzing phase differences between these images, INSAR can detect and measure surface displacements. Radar signals are compared to identify changes in phase, which are then translated into measurements of ground movement or deformation.
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