Transients affecting the calibration block for the red (left) and blue (right) arrays. During the calibration block, the detectors see alternatively the two blackbodies (top panels). Since the initial flux is significantly different from the fluxes of the internal blackbodies, a strong transient occurs during the first minute of the observation. The signals normalized to the median values of each blackbody (bottom panels) show how the same transient affects the fluxes from the two blackbodies (blue and red lines). The transient effect is more pronounced for the red array.