Noise nature investigation of sporadic Jovian decameter emission

The "superfine" time structure of the Jovian S burst decameter emission has been investigated with the aim to clarify the noise nature of the given ra diation. The Jovian Io-B noise storm taken for analysis in the paper has be en observed on June 8, 1997, with an acousto-optical spectrograph designed at the Observatory Nancay, and incorporated into the giant Kharkov, Ukraine , UTR-2 radio telescope, operating from 10 to 25 MHz. The presence of the f licker noise component in the processed signals has been shown with an appl ication of the wavelet transform and maximum likelihood techniques. The spe ctral parameters gamma characterizing such processes have been calculated f or different frequencies and different time intervals. The set of randomly distributed pulses has been considered as one of the possible models of S b ursts adiation, capable for producing this noise process.