Interface Region Imaging Spectrograph
The Interface Region Imaging Spectrograph (or IRIS) is a planned space probe to observe the Sun by NASA. It is a NASA Small Explorer program mission to investigate the physical conditions of the solar limb, particularly the chromosphere of the Sun. Lockheed Martin Solar and Astrophysics Laboratory (LMSAL) is integrating the observatory. The observatory consists of a spacecraft and spectrometer that LMSAL built, and a telescope provided by the Smithsonian Astrophysical Observatory. Once in orbit it will be operated by Lockheed Martin Solar and Astrophysics Laboratory and NASA Ames Research Center.
Its instrument is a high-frame-rate UV imaging spectrometer; one image a second, 0.3 arcsec spatial resolution, and sub-angstrom spectral resolution.
IRIS team 
Science and engineering team members include:
- Lockheed Martin Solar and Astrophysics Lab
- Lockheed Martin Sensing and Exploration Systems
- Smithsonian Astrophysical Observatory
- Montana State University – Bozeman
- Institute for Theoretical Astrophysics, University of Oslo
- High Altitude Observatory, NCAR
- Stanford University
- NASA Ames Research Center
- NASA Goddard Space Flight Center
- National Solar Observatory
- Space Sciences Lab, UC Berkeley
- Princeton Plasma Physics Laboratory
- Sydney Institute for Astronomy, University of Sydney
- Center for Plasma Astrophysics, Catholic University of Leuven
- Mullard Space Science Laboratory
- Rutherford-Appleton Laboratory
- European Space Agency
- Max Planck Institute for Solar System Research
- National Astronomical Observatory, Tokyo
- Niels Bohr Institute, University of Copenhagen
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