Explainer: How synthetic aperture radar (SAR), at the heart of Nisar, works

Unlike optical sensors, the synthetic aperture radar (SAR) at the heart of the Nisar mission expected to launch at 5.40pm today (July 30), doesn’t rely on visible light. SAR uses microwaves, allowing satellites to “see” through clouds and operate day or night. This capability makes SAR a powerful tool for monitoring everything from Antarctic ice […]

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