=== Rescuing Data===
N. B. It is NOT normally necessary to run the data rescue script described below; the problem we had with the interface freezing up and acquisitions not being completed is now solved.
Under normal operation, the system automatically updates the FITS cube header with supplementary information (filter, external trigger parameters, telescope pointing information etc.) and the moves the cube to the permanent (for the night) storage area. From time to time, it may be necessary to do this manually, using the rescue_data.py tool. In particular, if the system has frozen at the end of an acquisition, but before fixing the header and moving the data file, it will be necessary to perform this procedure. ''This procedure does NOT need to be done when stopping an acquisition; only if the interface hangs and you cannot do anything do you need to run this script.''