Mexico City is sinking, and a powerful new orbiting satellite that's monitoring changes in land levels all across the globe has discovered how quickly this is happening. It's all thanks to the mission's innovative dual-frequency band radar.
NISAR, the NASA–ISRO Synthetic Aperture Radar satellite, launched on July 30, 2025 as a joint partnership between NASA and the Indian Space Research Organisation (ISRO). Its mission is to track in real-time surface changes on Earth, from ground subsidence and the retreat of glaciers to and the movement of tectonic plates and the spread of wildfires — all to a precision of within a centimeter.
