The MRI takes pictures in the visible light spectrum and provides back-up for the HRI.

BBC: Q&A: Deep Impact comet mission

Deep Impact has two main science instruments: the High Resolution Instrument (HRI) and the Medium Resolution Instrument (MRI).

BBC: Q&A: Deep Impact comet mission

More recent work investigates the impact of long-term HRI applied to communication, quality of life, health, and educational goals.

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Other projects have explored how HRI can be applied to enhance human behavior as applied to motor learning and cognitive performance.

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In addition to taking normal images of the impact in the visible spectrum, the HRI provides an infrared "fingerprint" of the material from inside the comet's nucleus.

BBC: Q&A: Deep Impact comet mission

Similarly, the NHLPA could say that it is only willing to accept a lower share of HRI if additional retirement and pension benefits are negotiated for players.

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The HRI is the main science camera for the mission.

BBC: Q&A: Deep Impact comet mission

For instance, the NHL could argue that it is only amenable to setting the salary cap based on HRI if the NHLPA agrees to a more-stringent drug testing policy for players.

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It had issued its 5, 452 staff with HRI forms, meaning that if they did not agree to the new terms and conditions, they could be dismissed and then offered re-employment on those terms.

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