This is the trending plot for the ISAAC Hawaii structural noise (fixed pattern noise) QC parameters derived from DARK frames.

QC parameter are derived from post-pipeline Quality Control processes in Garching, hence there are no values from Paranal to be included.

Method: fit the histogram of the MASTER_DARK product by a Gaussian and use the width.

These plots describe:
1. FPN mode = DoubleCorr, quadrant = upper left (UL),
DIT=10sec (RED taken daily via health check),
DIT=5sec (BLUE, acquired as part of the calibration plan to reduce twilight flats) and
DIT=2sec (GREEN, acquired as part of the calibration plan to reduce photometric zeropints) and
any other DIT (BLACK)

2. FPN As Fig.1, but for UR quadrant
5. FPN As Fig.1 but for LL quadrant
6. FPN As Fig.1 but for LR quadrant

3. FPN mode = NonDest, quadrant = upper left (UL),
DIT=10sec (RED taken daily via health check),
DIT=180sec (BLUE, acquired as part of the calibration plan to match science spectra) and
DIT=5sec (GREEN, acquired as part of the calibration plan to match telluric standard stars) and
any other DIT (BLACK)

4. FPN As Fig.1, but for UR quadrant
7. FPN As Fig.1 but for LL quadrant
8. FPN As Fig.1 but for LR quadrant

Find more information about ISAAC DARK frames here.

Other QC parameters related to detector properties (like structural noise, linearity) are trended.