Measurements of the decorrelation bandwidth of diffractive scintillation versus observing frequency for PSR B0950+08. For Wu et al. (in prep.), the markers at 145 MHz indicate the median as well as 2.5 and 97.5 percentiles of a series of δν_DISS measurements. The width and height of the same-color rectangle around each marker shows observing bandwidth as well as minimum and maximum spectral resolution (corresponding to channel and band widths, respectively), respectively. Dashed rectangles show, in the same manner, the observing setup for three observing campaigns which did not make direct measurements of δν_DISS, but reported abrupt increases in PSR B0950+08’s intensity. Dotted diagonal lines illustrate ν⁴ dependence.