Health Check monitor

Plot 3 scores: 8|
data source:	uves_zflat (QC1 database)
dataset:	ydiffavg	•
fixed average:	0.0	Pix
rel. thresholds:	-0.4...0.4	Pix
N_data plotted:	86
[click on plot for closeup]

Plot 4 scores: 8|
data source:	uves_zflat (QC1 database)
dataset:	ydiffavg	•
fixed average:	0.0	Pix
rel. thresholds:	-0.4...0.4	Pix
N_data plotted:	86
[click on plot for closeup]

Plot 7 scores: 8|
data source:	uves_zflat (QC1 database)
dataset:	ydiffrms	•
mean:	0.0191	Pix
fixed thresholds:	0.01...0.03	Pix
N_data plotted:	86
[click on plot for closeup]

Plot 8 scores: 8|
data source:	uves_zflat (QC1 database)
dataset:	ydiffrms	•
mean:	0.03652	Pix
fixed thresholds:	0.025...0.055	Pix
N_data plotted:	86
[click on plot for closeup]

This is the trending report for UVES QC parameters derived from the Cross-Disperser Alignment reproducibility frames.

These data are taken daily. Each Cross-Disperser [CD] is moved into position such that the zeroth order from the echelle falls on the detector and the first frame is exposed, then the CD is moved away, and then moved back into position and the second frame is taken. Ideally, if the mechanical mechanisms are working perfectly, the zeroth order will appear at exactly the same position in the two frames. So this data tests the reproducability of the instrumental setup, in particular that the instrumental setups used during the night can be accurately reproduced during daytime calibrations.

The spatial position of the zeroth order is then measured at a number (~25) positions along the order in the two frames. Plots 1 to 4 trend the mean of the differences between the measured positions in the two frames. Plots 5-8 trend the RMS of these differences.

Find more information about UVES CD_ALIGN frames here.