J. Kissel

SDF is still having problems comparing / checking very small or very large EPICs records. This is usually exposed in the calibration group's "epics records" i.e. DARM loop model parameters at a reference time used to compute time-dependent correction factors, which are typically very small or very large -- in the 10^-17 levels or 10^+18 levels (see attached). It's unclear *when* exactly the claimed differences happen (maybe when the .snap comparison file is changed from safe to OBSERVE? Or maybe because when you *accept* the diffs, they're written at a lower precision than that comparison is made?), but it's something we're having to constantly reconcile before every observation stretch these days.