327MHz observations of 124 pulsars

These pulsars lie in the dispersion measure range of 37-503pc/cm3 and declination ({delta}) range of -57{deg}<{sigma}<60{deg}. New {tau}_SC_ estimates for 58 pulsars are presented, increasing the sample of all such measurements by about 40% at 327MHz.

Using all available {tau}_SC_ measurements in the literature, we investigate the dependence of {tau}_SC_ on dispersion measure. Our measurements, together with previously reported values for {tau}_SC_, affirm that the ionized interstellar medium up to 3kpc is consistent with the Kolmogorov spectrum, while it deviates significantly beyond this distance.