Researchers from NC State University, funded in part by the U.S. Department of Energy’s National Nuclear Security Administration, are combining satellite and social media data to develop new ways to confirm satellite data using geotagged social media posts and visa versa. Its applicability will be limited, however, in countries with a limited or virtually nonexistent social media presence, like North Korea.
Source: Satellite Imagery + Social Media = A New Way to Spot Emerging Nuclear Threats – Defense One