Radio frequency interference (RFI) is a problem in microwave remote sensing even for sensors operating in the protected band at 1.4 GHz (L-band).  Unfortunately, little is known about the sources of the interference, which complicates the design of systems to deal with it.  The SMAP radiometer is unique in that it comprises an array of tools to detect RFI, including spectral information and kurtosis in addition to the more conventional time-domain thresholding.  This data set contains examples used in an investigation to determine if the kurtosis (K) can be combined with the information abo