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Interface Region Imaging Spectrograph

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The Interface Region Imaging Spectrograph "IRIS" is a Small Explorer program mission to investigate the physical conditions of the solar limb, particularly the chromosphere. It will be built and operated by the Lockheed Martin Solar and Astrophysics Laboratory, and launched in late 2012 by a Pegasus rocket.

Its instrument is a high-frame-rate UV imaging spectrometer; one image a second, 0.3 arcsec spatial resolution, and sub-angstrom spectral resolution.

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