2.3.1 spase://SMWG/Instrument/SES-14/GOLD GOLD Global-scale Observations of the Limb and Disk Mission 2019-04-22T00:00:00Z The Global-scale Observations of the Limb and Disk (GOLD) mission is a heliophysics Mission of Opportunity for NASA’s Explorers program. GOLD is intended to perform a two-year mission imaging Earth's thermosphere and ionosphere from geostationary orbit. GOLD is a two-channel far-ultraviolet (FUV) imaging spectrograph built by the Laboratory for Atmospheric and Space Physics at the University of Colorado Boulder and flown as a hosted payload on the commercial communications satellite SES-14. The scientific objectives of the GOLD mission are to determine how geomagnetic storms alter the temperature and composition of Earth’s atmosphere, to analyze the global-scale response of the thermosphere to solar extreme-ultraviolet variability, to investigate the significance of atmospheric waves and tides propagating from below the temperature structure of the thermosphere and to resolve how the structure of the equatorial ionosphere influences the formation and evolution of equatorial plasma density irregularities. The viewpoint provided by GOLD’s geostationary orbit – from which the same hemisphere is always observable – is a new perspective on the Earth’s upper atmosphere. This viewpoint allows local time, universal time and longitudinal variations of the thermosphere and ionosphere's response to the various forcing mechanisms to be uniquely determined. National Aeronautics and Space Administration; Dr. Richard Eastes spase://SMWG/Person/Richard.Eastes PrincipalInvestigator GOLD Homepage web page http://gold.cs.ucf.edu/ GOLD web page with news and other information. GOLD Missions Space Science Reviews Article https://doi.org/10.1007/s11214-017-0392-2 Eastes, R.W., McClintock, W.E., Burns, A.G. et al. Space Sci. Rev. (2017) vol. 212, pp.383. Photometer Global-scale Observations of the Limb and Disk 2018-01-25T00:00:00Z spase://SMWG/Observatory/SES-14