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SAR Remote Sensing

What is SAR? Synthetic Aperture Radar (SAR) is a type of active remote sensing technology that uses microwave radiation to image the Earth's surface. Unlike passive sensors that rely on sunlight, SAR generates its own signal, making it capable of capturing images day and night, regardless of weather conditions. Key Concepts and Terminology: Microwaves: Electromagnetic waves with wavelengths longer than infrared but shorter than radio waves. SAR typically uses microwaves because they can penetrate clouds, vegetation, and some materials, providing valuable information about the Earth's surface. Active Sensing: A technique where the sensor emits its own signal and records the reflected energy. SAR is an active sensor. Backscatter: The energy that is reflected back to the radar sensor after interacting with the Earth's surface. The strength and phase of the backscattered signal depend on the properties of the target, such as its surface roughness, moisture conte...