Plotted entries from OPSLOG files in NACO report ZEROP, plot 2, data set zeropH_HC:

DATE       MJD-OBS      parameter values
==========================================================================
2008-11-05 54775.990076 23.91908631	zeropH_HC
2008-11-07 54777.988356 24.140887	zeropH_HC
2008-11-12 54782.002264 24.14620876	zeropH_HC
2008-11-12 54782.990645 24.07506585	zeropH_HC
2008-11-15 54785.000764 24.1261105	zeropH_HC
2008-11-15 54785.992546 24.16526633	zeropH_HC
2008-11-16 54786.993085 24.15673172	zeropH_HC
2008-11-21 54791.364246 24.15470194	zeropH_HC
2008-11-23 54793.360056 24.18562364	zeropH_HC