The CCDF of the SRB data set from 1996 to 2017. These events are plotted again in yellow in Figure 4 of Section 4. It is clear that the function is asymptotically decreasing towards 10⁶ sfu. Saturation occurs on the RSTN instrument when the flux is larger than 10⁶ sfu. There is currently not a global solar radio spectrometer network which is flux calibrated and which can measure above 10⁶ sfu.