NASAのインスタグラム(nasa) - 3月23日 07時09分

Near-Earth space is an atmospheric gold mine. To study this uncharted, dynamic area that responds both to space weather above and the lower atmosphere below, we recently launched our Global-scale Observations of the Limb and Disk (GOLD) instrument. GOLD is designed to track big events in the lower atmosphere, such as hurricanes or tsunamis, that create waves that can travel all the way up to this interface to space, changing wind patterns and causing disruptions.

Roughly the size of a mini fridge, the 80-pound GOLD instrument is an imaging spectrograph that breaks light down into its component wavelengths and measures their intensities. Specifically, it measures far ultraviolet light, creating full-disk ultraviolet images of Earth from its geostationary vantage point above the Western Hemisphere. GOLD will collect observations with a 30-minute cadence, much higher than any mission that has come before it. Providing the first maps of the upper atmosphere’s changing temperature and composition all over the Americas.

This image of Earth was taken by the International Space Station (@国際宇宙ステーション) crew in December 2017.

Credit: NASA/Chris Meaney

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