Space–time intensity maps. The panels show the time variation (vertical axis) of brightness temperature measured at k_2r along two spatial slits (horizontal axis) located at the positions y = 0 Mm (panel a) and 12 Mm (panel b). The spectra were degraded before the peak-finding algorithm was applied. Panel a represents the quieter regions of the simulation domain. Panel b represents a cut through the network-dominated regions of the simulation. The color scale is set to the same limits as in Fig. 2. Green pixels indicate spectra where no k_2r feature could be detected.