The bio-optical suite developed for the ITP includes a new self-calibration/self-characterization system which incorporates optical feedback between sensors. This feedback is done by a rigid image conduit embedded in the shutter, which directs excitation light from the triplet fluorometer to the PAR sensor. Decreases in this level of feedback over time indicate a loss in coupling, due to increases in biofouling and/or decreases in the fluorometer output.

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Last updated July 11, 2014
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