Chirp mass distribution (ℳ, upper left panel), redshift (z, upper right panel), twice the observed Keplerian frequency (f₂, lower left panel), and inclination angle (i, lower right panel) of the detected MBHBs. Each color represents the distributions when different eccentricity values are used to evolve the MBHB population (e₀ = 0, blue, e₀ = 0.5, orange and e₀ = 0.9 purple). N_Bin represents the number of objects in a given bin of the histogram while N_tot is the total number of objects analyzed. While the upper panels represent the results for 30-year SKA PTA, the lower ones correspond to 10-year MPTA.