This plot shows the RMS retrieved from the ZIMPOL imaging master flats.
It monitors potential changes in the flat field structure.
The following setups are monitored:

<ul>
<li> V filter, DIT, NDIT = 4.0, 10
<li> N_R filter, DIT, NDIT = 2.0, 20
<li> N_I filter, DIT, NDIT = 2.0, 40
</ul>