Daily Difference Time Series
Daily MLE Fit
Daily Columns
Adjusted Daily Vertical Column
Daily Difference to vc_trop_int vs Local Time
Daily Difference to vc_trop_int vs Solar Zenith
How to read the qref model
Each coloured point is an observed daily qref estimate from one running-calibration window. The observations from different windows overlap strongly and are therefore not independent.
The black latent curve is the model's common estimate of qref. It is decomposed into a gradual component, representing persistent smooth drift, and an abrupt component, representing detected level changes. Orange vertical lines mark days classified as jumps.
The operational correction is latent qref minus the fixed reference level. For the vertical-column display, qref_correction / AMF is subtracted from the original column. A shaded band is shown only when uncertainty bounds are available in the saved product. The qref bounds are conditional on the selected smooth+jump model and do not include additional jump-model-selection uncertainty.
Interpretation note: a detected jump is model evidence for an abrupt level change, not automatically evidence of a new externally defined validity period. Faint-grey bands mark calibration-file validity periods in which the selected gas is not calibrated; their synthetic reference periods remain available through the calibration overlay.Daily latent qref model results
Uncertainties are conditional 1-sigma latent-model uncertainties. The gradual-abrupt covariance is included in the total uncertainty; the total is the qref term propagated into the adjusted daily-column uncertainty budget.