  We describe calibration data, and discuss performance of the photon-counting
flight detectors for the Ultraviolet Imaging Telescopes on the Astrosat
observatory. The paper describes dark current, flat field and light-spot images
for FUV, NUV, and Visible band detectors at more than one wavelength setting
for each. We also report on nominal gain and low-gain operations, full- and
sub-window read rates, and non-photon-counting modes of operation, all expected
to be used in flight. We derive corrections to the event centroids from the
CMOS readout arrays, for different centroid algorithms. We derive spatial
resolution values for each detector and plots of point-source signal saturation
for different flux levels. We also discuss ways to correct for saturation in
extended object images.
