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77.05 ± 4.75

When tracking a star, the CT roll error signal was a measure of the offset of the star image-centered, modulated, instantaneous FOV from the CT null plane. This error signal was provided to the ACE roll channel and had the transfer function shown in figure 119.

The star intensity signal was provided by the CT to the ACE for determining when a star meeting preselected brightness criteria was within the CT FOV. The transfer function of the star intensity signal is shown in figure 120. star beyond CT FOV.

VO RE, deg

Figure 119.- Transfer function of roll error. Search bias when

VO RE, deg

Figure 119.- Transfer function of roll error. Search bias when

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