


QC PLOTS 

CURRENT 
HISTORY 
RAW parameters 


DIFFERENCE parameters 


RATIO parameters 


QC1 database (advanced users):
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Click on CURRENT to see the current trending (Health Check).
Click on HISTORY to see the historical evolution of the trending. 
Image
flats (also called check flats) are measured as technical calibrations daily as part of the ISAAC calibration plan in three different setups:
 ARM=SW/Hawaii, FILTER=NB_1.06, camera=S2, DIT/NDIT=4.0/4, READ=DoubleCorr. The setup SW S2 is used in imaging mode.
 ARM=LW/Aladdin, FILTER=NB=1.64, camera=L2, DIT/NDIT=4.0/4, READ=DoubleCorrLowBias. The setup LW L2 is used for imaging science OBs in jitter mode. The pixel scale is 0.148
 ARM=LW/Aladdin, FILTER=NB=1.64, camera=L3, DIT/NDIT=4.0/4, READ=DoubleCorrLowBias. The setup LW L3 is used for imaging science OBs in chopping mode. The pixel scale is 0.017.
The check flats provide a quick health check of the instrument, in particular for the imaging mode. Furthermore detector features like debris are easily detected on the raw frames.
20080101: There is no pipeline support for the single checkflat raw frames. The following preliminary service is provided by QC Garching:
 The first checkflat of a year is used a reference checkflat with assigned PRO.CATG=REF_CHECKFLAT.
 We divide the current checkflat by the reference checkflat and assign the PRO.CATG=RATiO_CHECK_FLAT to the product of the QC script. We subtract the reference checkflat from the current checkflat and assign the PRO.CATG=DIFF_CHECKFLAT to the product of the QC script.
 several QC parameters are defined and measured on the raw frame and on both products.
 All checkflats from 20060101 have been processed backwards, and the QC1 parameters have been ingested into the QC1 DB.
 The products will not be ingested into the master calibration archive.
Find here an example DIFF_CHECKFLAT product in early 2007 with a short time difference to the reference checkflat and one of late 2007 with a long time difference to the checkflat.
 SWarm, Hawaii detector, S2 camera : Jan 2007: Dec 2007:
 LWarm, Aladdin detector, L2 camera: Jan 2007 Dec 2007:
 LWarm, Aladdin detector, L3 camera: Feb 2007 Dec 2007:
The service is preliminary and subject of review.
Only simple statistical parameters are extracted from checkflat raw frames. Five 100x100 pixel size windows are defined. The location is outlined in the following image:
QC1 parameters
parameter 
QC1 database: table, name 
procedure 
raw frame intensity and standard deviation from detector window 
isaac_checkflat, qc_cc_med, qc_cc_stdev 
 For the following 100x100 window on the raw frame [x1,y1:x2,y2] = [462, 462 : 562, 562]
the median and the standard deviation is derived from the sample of 10000 pixel. The window is in the center [512:512] of the detector 
raw frame intensity and standard deviation from detector window 
isaac_checkflat, qc_ul_med, qc_ul_stdev 
 For the following 100x100 window on the raw frame [x1,y1:x2,y2] = [50, 874 : 150, 974]
the median and the standard deviation is derived from the sample of 10000 pixel. The window is in the upper left corner of the detector with 50 pixel distance from the edges. 
raw frame intensity and standard deviation from detector window 
isaac_checkflat, qc_ur_med, qc_ur_stdev 
 For the following 100x100 window on the raw frame [x1,y1:x2,y2] = [874, 874 : 974, 974]
the median and the standard deviation is derived from the sample of 10000 pixel. The window is in the upper right corner of the detector with 50 pixel distance from the edges. 
raw frame intensity and standard deviation from detector window 
isaac_checkflat, qc_ll_med, qc_ll_stdev 
 For the following 100x100 window on the raw frame [x1,y1:x2,y2] = [50, 50 : 150, 150]
the median and the standard deviation is derived from the sample of 10000 pixel. It window is in the lower left corner of the detector with 50 pixel distance from the edges. 
raw frame intensity and standard deviation from detector window 
isaac_checkflat, qc_lr_med, qc_lr_stdev 
 For the following 100x100 window on the raw frame [x1,y1:x2,y2] = [874, 50 : 974, 150]
the median and the standard deviation is derived from the sample of 10000 pixel. It window is in the lower right corner of the detector with 50 pixel distance from the edges. 
Relative intensities. 
isaac_checkflat, qc_ul_ratio, qc_ur_ratio, qc_ll_ratio, qc_lr_ratio 
A simple ratio of two parameters:
qc_ul_ratio = qc_ul_med / qc_cc_med,
qc_ur_ratio = qc_ur_med / qc_cc_med,
qc_ll_ratio = qc_ll_med / qc_cc_med,
qc_lr_ratio = qc_lr_med / qc_cc_med

Trending
top parameters from checkflat difference frames 
Only simple statistical parameters are extracted from frame : checkflat minus the reference checkflat. . Five 100x100 pixel size windows are defined. The windows have the same size as used for the checkflat raw frames, but the locals are in the center of the detector quadrants instead of being pushed closer to the detector edge as used for the raw frame checkflats. The location is outlined in the following image:
QC1 parameters
parameter 
QC1 database: table, name 
procedure 
raw frame intensity and standard deviation from detector window 
isaac_checkflat, qc_cc_D_med, qc_cc_D_stdev 
 For the following 100x100 window on the raw frame [x1,y1:x2,y2] = [462, 462 : 562, 562]
the median and the standard deviation is derived from the sample of 10000 pixel. The window is in the center [512:512] of the detector 
raw frame intensity and standard deviation from detector window 
isaac_checkflat, qc_ul_D_med, qc_ul_D_stdev 
 For the following 100x100 window on the raw frame [x1,y1:x2,y2] = [206, 718 : 306, 818]
the median and the standard deviation is derived from the sample of 10000 pixel. The window is in the center of the upper left detector quadrant. 
raw frame intensity and standard deviation from detector window 
isaac_checkflat, qc_ur_D_med, qc_ur_D_stdev 
 For the following 100x100 window on the raw frame [x1,y1:x2,y2] = [718, 718 : 818, 818]
the median and the standard deviation is derived from the sample of 10000 pixel. The window is in the center of the upper right detector quadrant. 
raw frame intensity and standard deviation from detector window 
isaac_checkflat, qc_ll_D_med, qc_ll_D_stdev 
 For the following 100x100 window on the raw frame [x1,y1:x2,y2] = [206, 206 : 306, 306]
the median and the standard deviation is derived from the sample of 10000 pixel. It window is in the center of the lower left detector quadrant. 
raw frame intensity and standard deviation from detector window 
isaac_checkflat, qc_lr_D_med, qc_lr_D_stdev 
 For the following 100x100 window on the raw frame [x1,y1:x2,y2] = [718, 206 : 818, 306]
the median and the standard deviation is derived from the sample of 10000 pixel. It window is in the center of the lower right detector quadrant. 
Trending
History
As the reference checkflat frame is updated in the first January days of each year, there is a natural offset in all QC parameters derived from the product frames.
top parameters from checkflat ratio frames 
Only simple statistical parameters are extracted from frame : checkflat divided by the reference checkflat. Five 100x100 pixel size windows are defined. The windows have the same size as used for the checkflat raw frames, but the locals are in the center of the detector quadrants instead of being pushed closer to the detector edge as used for the raw frame checkflats. The location is outlined in the following image:
QC1 parameters
parameter 
QC1 database: table, name 
procedure 
raw frame intensity and standard deviation from detector window 
isaac_checkflat, qc_cc_R_med, qc_cc_R_stdev 
 For the following 100x100 window on the raw frame [x1,y1:x2,y2] = [462, 462 : 562, 562]
the median and the standard deviation is derived from the sample of 10000 pixel. The window is in the center [512:512] of the detector 
raw frame intensity and standard deviation from detector window 
isaac_checkflat, qc_ul_R_med, qc_ul_R_stdev 
 For the following 100x100 window on the raw frame [x1,y1:x2,y2] = [206, 718 : 306, 818]
the median and the standard deviation is derived from the sample of 10000 pixel. The window is in the center of the upper left detector quadrant. 
raw frame intensity and standard deviation from detector window 
isaac_checkflat, qc_ur_R_med, qc_ur_R_stdev 
 For the following 100x100 window on the raw frame [x1,y1:x2,y2] = [718, 718 : 818, 818]
the median and the standard deviation is derived from the sample of 10000 pixel. The window is in the center of the upper right detector quadrant. 
raw frame intensity and standard deviation from detector window 
isaac_checkflat, qc_ll_R_med, qc_ll_R_stdev 
 For the following 100x100 window on the raw frame [x1,y1:x2,y2] = [206, 206 : 306, 306]
the median and the standard deviation is derived from the sample of 10000 pixel. It window is in the center of the lower left detector quadrant. 
raw frame intensity and standard deviation from detector window 
isaac_checkflat, qc_lr_R_med, qc_lr_R_stdev 
 For the following 100x100 window on the raw frame [x1,y1:x2,y2] = [718, 206 : 818, 306]
the median and the standard deviation is derived from the sample of 10000 pixel. It window is in the center of the lower right detector quadrant. 
Trending
History
As the reference checkflat frame is updated in the first January days of each year, there is a natural offset in all QC parameters derived from the product frames.
