Global-scale Observations of the Limb and Disk

Global-scale Observations of the Limb and Disk (GOLD) is a NASA mission aimed at studying the Earth's upper atmosphere, particularly the region known as the ionosphere and the thermosphere. Launched on January 25, 2018, aboard an experimental satellite called the International Space Station (ISS), GOLD's primary objective is to obtain detailed observations of the Earth's limb and disk, which means the edge and the surface of the Earth as seen from space.