... With this, and the other files listed below, which should already be in the ODF, it should be possible to process the OM Fast mode event list files. rrrr_iiiiiiiiii_SCX00000NPH.FIT - OM Non-periodic Housekeeping file . ... Often a raw image FIT-file corresponding to the OM Fast mode window is also present in the input data set, as well as a larger image corresponding to the OM imaging window for the same exposure (rrrr_iiiiiiiiii_OMSeeewwIMI.FIT), but these files are not used for the Fast mode chain...