Sentinel-1 C-band Synthetic Aperture Radar (SAR)

Sentinel-1 SAR image acquired January 15, 2018, showing the land and sea SW of Istanbul, Turkey. Objects in water are ships. Credit: ESA/Sentinel Hub.

The Synthetic Aperture Radar (SAR) aboard the ESA (European Space Agency's) Sentinel-1A/B satellites provides continuous all-weather, day-and-night imagery at C-band frequencies and operating in four exclusive imaging modes with different spatial resolutions and coverages. SAR is an active data technology where a sensor produces its own energy and then records the amount of that energy reflected back. SAR has the advantage of operating at wavelengths not impeded by cloud cover or a lack of illumination and can acquire data day or night under all weather conditions.

Sentinel-1 C-SAR

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