J. Kissel I have installed updates to custom c-code and simulink library parts used by the h1calcs front-end model yesterday (2019-01-22) during maintenance (otherwise mentioned only briefly in Dave's maintenance-day summary LHO aLOG 46588). This update (described in more detail in LLO aLOG 42919) further improves the conditioning of the front-end constructed Time-Dependent Correction Factors (TDCFs), facilitating the eventual construction of a DELTA L EXTERNAL stream that is Compensated For Time Dependence (CFTD_DELTAL_EXTERNAL). I've got lots more work to do, though, before I'm confident enough to start applying TDCFs to CFTD_DELTAL_EXTERNAL.