  We present a preliminary calibration and flight performance of the Long-Slit
Imaging Dual Order Spectrograph (LIDOS), a rocket-borne instrument with a large
dynamic range in the 900 - 1700A bandpass. The instrument observes UV-bright
objects with a CCD channel and fainter nebulosity with an MCP detector. The
image quality and the detector quantum efficiencies were determined using the
calibration and test equipment at the Johns Hopkins University, and further
monitored using an on-board electron-impact calibration lamp. We review results
from each of the three flights of the instrument.
