DM time series for PSR J2145−0750 obtained with different noise elements. Top panel shows the DM reconstruction from the SWGP model. The second panel demonstrates the result from the ${\overline{n}}_{\mathrm{e}}$ part of the posterior chain. The third panel shows the resultant signal due to DMGP. Assuming these three are the main components that contribute to the DM time series, the fourth panel combines these signals. The fifth panel is the DM time series using Epoch-Wise method. And the bottom panel shows the residuals in DM between the Epoch-Wise and the combined signal from SWGP, ${\overline{n}}_{\mathrm{e}}$, and DMGP.