Fig. 3.

Magnetic spectrometer yoke temperatures for all 8 MagEIS units plotted over the duration of the mission. The fixed temperatures assumed for the gain and offsets used in the bowtie analysis (Sect. 4.2) are indicated in magenta. The spurious (noisy) housekeeping values in M35-A and M75-A (e.g., Fig. 2) have been filtered out in these panels. The times when LOW-A and M35-B were rebooted into maintenance mode are noted, as are the times when the HIGH unit’s heater set point was changed (with vertical purple hashes in the bottom panels). The last two panels for Probe B show insets of the short term variability in yoke temperature due to the thermal control system ($\sim 15\text{min}$ periodicity for LOW/MED; $\sim 60\text{min}$ for HIGH)