Figure 8.3: Relative variations in the responses of gyros 1 and 2 over part of the
mission. Synchronised discontinuities in the responses are observed at times of
switching on or off gyro 4 (in redundant mode) at days 655, 661, 718, and 789, and
the change of tank used to supply the cold gas for the thruster firings at day 900.
Temperature changes are also observed to affect the responses (around day 450 and
day 1100).