Along-scan residuals of individual CCD observations vs. time for an interval of 500 s. Blue and red dots represent observations in the preceding and following field of view, respectively. Only good observations are shown. The vertical grey lines mark the times of the knots for the attitude spline. Top: residuals from the baseline primary solution. Middle: residuals from the special validation solution with shifted knot sequence. Bottom: residuals from the special validation solution using a shorter knot interval of 15 s.
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