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Fig. 9

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AL error angle when fitting B-splines to the astrometric attitude (the physical attitude averaged over 4.4 s). Each colour indicates a different time interval between B-spline knots. This figure illustrates what we want to achieve in the attitude reconstruction: to choose the knot interval that minimises the noise due to the B-spline fit. The shorter the knot interval the smaller the amplitude of the oscillations.

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