The identifier of the mapping function used can be found in the listing. The time span between adjacent nodes of the arguments of the spline is constant. Constraints on the rate of change of atmosphere path delay in zenith direction are imposed. Values of sigmas of constraints used can be found in the listing. Argument is time in hours elapsed from the first observation of the session.
Values are in picoseconds.
One sigma formal uncertainties are shown by a filled area. Both functions are normalized in order to have minimal value 1. They are modeled by a linear spline. Some observations which don't satisfy this model are rejected as outliers. Argument of the plot is time in hours elapsed from the first observation of the session.