The U.S. and India just launched NISAR, a powerful radar satellite that will be able to monitor changes in Earth's surface that are as small as a centimeter.

Unlike optical sensors, the synthetic aperture radar (SAR) at the heart of the Nisar mission doesn’t rely on visible light. SAR uses microwaves, allo

India launched on Wednesday a $1.5 billion, first-of-its-kind radar imaging satellite built in collaboration with NASA, deploying it to help enhance global monitoring of climate change and natural disasters.