NASA’s Global-scale Observations of the Limb and Disk (GOLD) mission has observed dramatic and unexplained shifts in the location of features in the Earth’s ionosphere surrounding the equator. Unanticipated changes in the nighttime ionosphere can lead to disruptions in communication and navigation that depend on satellites, such as GPS. GOLD is an ultraviolet imaging spectrograph that was designed and built … Continue reading GOLD reveals unexpected changes in Earth’s nighttime ionosphere