Calibration parameters as a function of frequency as determined from METM analyses of PSR J0953+0755 observations, in two different time intervals. The best-fit calibration parameters were corrected for the scale and offset factors determined from the analysis described in Sect. 3, to match the archetypes for the corresponding parameter and time segment, displayed as dashed black lines. A different color was used for each of the observations made within the MJD range specified in the title.