Following last Friday's meeting regarding IFO relocking, one action item for CDS was to report on the current status of the SDF reference snapshot files.

In the attached text file, for each model, the status of the safe.snap, down.snap (if used) and OBSERVE.snap are shown. If the reference file exists, its modification date is shown. If the reference points to a different state's file, that state's name is shown.

I've ommitted non-control models (e.g. IOP and SUSAUX).