Calibration Access and Data Handbook

Procedure

The OM CCF component BadPix is read and the entries of bad pixels falling into the specified area are extracted. A value of zero is assigned to defect free pixels in the output map. Bad pixels are marked in the output map by non-zero values. The value assigned to a bad pixel encodes the type of defect. The mapping between CCF description and the integer encoding used in the output badpixel map is as following:

Table 1: Encoding of OM detector defects

type	CCF description	CAL encoding
turn on channel	T	10
hot CCD pixel	H	11
edge emission	E	12
dead CCD pixel	D	13
dead pore	P	14
bad CCD pixel	B	15
bad for unknown reason	U	16
area of reduced sensitivity
(reduction of sensitivity in steps of 10%)	1-9	1 to 9