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4. Calibration and Performance
In this chapter an overview is given of different aspects of the
instrument performance during the mission. The approach to
the instrument calibration is explained. Important topics addressed
are the conversion of the measured signal into flux density, the dark
current correction, flat-fielding of the camera and the
determination of the Point Spread Function (PSF). Other aspects which
are important in the interpretation of the ISOCAM data are discussed like,
for instance, the drifts or `transient' behaviour of the detector
signal, the effects of cosmic ray impacts, and in relation to the
optics: the wheel positioning jitter, ghost reflections and
straylight, and some degree of field of view or `pincushion'
distortion. At the end of the chapter a global error budget is given.
Subsections
ISO Handbook Volume II (CAM), Version 2.0, SAI/1999-057/Dc