This plot shows the IRDIS detector dark level values of the three regularly acquired health check 
setups</font><p><font size="2">

<ul>
<li>DIT=2, NDIT=40
<li>DIT=8, NDIT=25
<li>DIT=30, NDIT=15
</ul>

</font><p><font size="2">
Darks are used as a technical monitoring of the detector but are not used to calibrate science data. <br>
The background frames are used to calibrate science frames from four IRDIS modes CI, DBI, DPI and LSS.</font><p><font size="2">