  The CRONA project is a joint enterprise between Caltech and the astronomical
observatory of Rome and Naples aimed to the photometric calibration of the
Second Palomar Sky Survey (POSS-II) plates and to the construction of a
complete photometric and astrometric catalogue of all objects present on the
POSS-II. The calibrated final catalogues of objects will be made available to
the community. We present here a comparison between the performances of the
SKICAT and DAOPHOT packages applied to POSS-II images of the globular cluster
M92.
