IRIS: NASA's Interface Region Imaging Spectrograph Mission Satellite Completed

The fully integrated spacecraft and science instrument for NASA's Interface Region Imaging Spectrograph (IRIS) mission is seen in a cleanroom at the Lockheed Martin Space Systems Sunnyvale, Calif. facility. 

The solar arrays are deployed in the configuration they will assume when in orbit.

The spacecraft and science instrument integration for the Interface Region Imaging Spectrograph (IRIS) - NASA's next Small Explorer (SMEX) Mission - has been completed, and final testing is underway.

NASA's Ames Research Center, Moffett Field, Calif., is responsible for mission operations and the ground data system.

The Norwegian Space Agency will capture the IRIS data with their antennas in Svalbard, inside the Arctic Circle, in northern Norway.

The science data will be managed by the Joint Science Operations Center of the Solar Dynamics Observatory, run by Stanford and Lockheed Martin.

"The entire IRIS team is enormously pleased that we've reached this crucial milestone," said Gary Kushner, Lockheed Martin IRIS program manager. "

After many months of hard work by the Lockheed Martin team and all of our collaborators and subcontractors in designing, engineering and building the instrument and spacecraft bus, our goal of putting it into orbit is in sight and we look forward to producing great science at a low cost."

Understanding the interface between the photosphere and corona remains a fundamental challenge in solar and heliospheric science.

The IRIS mission will open a window of discovery into this crucial region by tracing the flow of energy and plasma through the chromosphere and transition region into the corona using spectrometry and imaging.

Here all but a few percent of the non-radiative energy leaving the Sun is converted to heat and radiation. The remaining few percent create the corona and solar wind.

Magnetic fields and plasma exert comparable forces in this region, and IRIS is uniquely suited to provide the observations necessary to pinpoint the physical forces at work in this little understood piece of real estate near the surface of the Sun.

"The interpretation of the IRIS spectra is a major effort coordinated by the IRIS Science Team that will utilize the full extent of the power of the most advanced computational resources in the world.

"It is this new capability, along with development of state of the art codes and numerical models by the University of Oslo that capture the complexities of this region, which make the IRIS mission possible.

Without these important elements we would be unable to fully interpret the IRIS spectra," said Dr. Alan Title, IRIS principal investigator and physicist at the ATC Solar and Astrophysics Laboratory in Palo Alto.