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A cross-plot of the matched observations during the first month of deployment is given in
figure 3. Comparisons were limited to one month as a representation of a typical field deployment
and to focus on initial instrument offset versus impacts of biofouling during an extended
deployment. A linear regression of the data (r
2
= 0.98) produced a slope of 0.93 and intercept of
1.61, indicating an initial calibration offset.
Figure 3
. MTU GLRI field response plot for the first month of deployment of Troll 9000 DO instrument
compared to reference DO samples. The plotted line represents a 1:1 correspondence. (Yellow circles
denote adjusted reference values).