The OTFC processing system was developed at the Canadian Astronomy Data Centre (CADC) and the Space Telescope European Coordinating Facility (ST-ECF) and is implemented at both sites and at Space Telescope Science Institute (STScI).
[1] The OTFC system currently provides data calibration for the Wide Field and Planetary Camera 2 (WFPC2) and Space Telescope Imaging Spectrograph (STIS).
[2] The main goals behind the implementation of the OTFC system are to take advantage of better calibration files and the much smaller storage area required if only raw files are kept in the archives.
Raw and calibrated data are stored in the HST archive (DADS).
[2] Frequently, users must recalibrate the data at their home sites to take advantage of better calibration files or software.