The format of the file is 4288 x 4096. Each chip of the 2x1 mosaic covers a field of 5.5 x 2.7 arcmin. In the default position of the rotator the gap runs in the N-S direciton. The angular misalignment between the two chips is smaller than 6 arcmin. The angular misalignment between the two chips is smaller than 6 arcmin.
Accurate astrometry requires an independent calibration of the two subfields.
The chip geometry is summarized in Fig.1, with the effect of an additional Rotator Offset. The last set of measurements obtained using several Landolt standard fields is presented hereafter for the Bessel filters. For the purpose of observation preparation, an exposure time calculator for SUSI2 is available at this web site. It computes the counts of the instrument based on the optics and CCD data as they are known now. The results are in good agreement with the number of photo-electrons measured at the telescope during the commissioning of the instrument.