First observations of flickering auroral roar

We present, observations of similar to 10 Hz pulsations in the amplitude of an auroral roar emission. These pulsations vary in frequency from 7-11 Hz and occur in groups which last for similar to1 sec With adjacent pulsation groups spaced from one to several seconds. We put forth that these pulsatio ns reflect 7-11 Hz modulations in the distribution function of the auroral electrons, similar to those associated with flickering aurora. The radio ob servations provide an additional means of probing this phenomenon and in pa rticular may put constraints on the form of modulations of the electron dis tribution function at the auroral roar source height of a few hundred kilom eters.