On the Quasi-periodic Decameter Radio Emission from Jupiter Associated with Ganymede

We discuss the possibility of the realization of the plasma generation mechanism in the source of decameter radio emission associated with Ganymede and the explanation of the formation of quasi-periodic sequences of bursts of this radiation based on this mechanism. According to the model being discussed, the recorded quasi-periodic sequences of radiation pulses are a consequence of the realization of a pulsating regime of plasma wave conversion into extraordinary electromagnetic waves with a small refractive index in the source. The negative radiation frequency drift observed in the frequency–time spectrogram is due to the group delay of waves with a small refractive index and the dispersion of the medium. Based on the plasma model, we have estimated the plasma parameters in the generation region, which are in agreement with the data obtained through satellite measurements.