Calibration data (orange points with measured uncertainties), final models (blue lines), and residuals for three-trap species CtiPixel models for two devices and epochs: A typical calibration for row 5, strip 8 (=AF5) near the start of the mission at OBMT 2536 revolutions (upper panels), and a poor example for row 3, strip 12 (=AF9) towards the end of the mission. The calibration data consist of seven individual post-scan trails, measured over a wide range in injected signal level, and having a length of 20 pixels each; they are shown concatenated in these plots for convenience.