Whenever you think about satellite tv for pc imagery, you most likely image crisp pictures of Earth taken from orbit. However one other know-how used to picture the planet, artificial aperture radar (SAR), is heating up, following a surge in private and non-private satellite tv for pc launches. SAR satellites use radars, not cameras, to take snapshots of Earth. Evaluating two SAR pictures taken at completely different instances from the identical place, a way referred to as interferometric SAR (InSAR), can reveal floor actions of just some millimeters. Watch the video to find out how InSAR is reworking earth science—and what to anticipate from the approach within the coming years.