Black: segment of raw data for one detector at 143 GHz before any deglitching; an estimate of the sky signal has been subtracted. Red: a time stream reconstructed from the estimated templates of long glitches with the method presented in Sect. 3.1. We have chosen a region in the vicinity of a large event. Data that are flagged for the analysis are indicated by the lines at the bottom of the figure. Notice the high level of confusion between long glitch signals.