Health Check monitor

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: take a simple standard deviation of the MASTER_DARK frame quadrant, no clipping is applied. This paramater is by intention sensitive to changes in the number and strength of hot pixels. The robust scatter of the MASTER_DARKs is trended by the FPN QC parameter

These plots describe:
1. stdev 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. stdev As Fig.1, but for UR quadrant
5. stdev As Fig.1 but for LL quadrant
6. stdev As Fig.1 but for LR quadrant

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

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