RMN of the fitted perturbed attitude with respect to the error-free astrometric attitude versus the time interval between knots in the B-spline fit. Each group of symbols represents a different set of experiments per panel. The top panel shows the effect of different thruster noise levels (test #1 in Sect. 5.2), the middle panel presents the RMN with respect to different number of observations per second (see test #2), and the bottom panel shows the effect of different mean star magnitudes (test #3). All horizontal axes range from 1 to 30 s, and the curves represent the result of fitting Eq. (15) to the data points.