Instrument Testing at Ball Aerospace

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Dennis Gallagher and Bryan Martin align mirrors in the Spectral Imaging Module (SIM) of the Deep Impact mission's High Resolution Instrument (HRI). This instrument and the camera will watch the crater form and will measure spectral signatures of the comet both before and after impact. These signatures will reveal the composition of the surface and interior of Comet Tempel 1.

CREDIT: Ball Aerospace & Technologies Corp.