Internal structure of the Jovian simple S-burst obtained with the wavelet analysis technique

¹ Institute of Radio Astronomy, Krasnoznamennaya St. 4, 61002 Kharkov, Ukraine
² Space Research Institute, Austrian Academy of Sciences, Schmiedlstrasse 6, 8042 Graz, Austria e-mail: helmut.rucker@oeaw.ac.at
³ Institute of Applied Physics, Russian Academy of Sciences, Uljanov St. 46, 603600 Nizhny Novgorod, Russia

Received: 17 February 2003
Accepted: 14 May 2004

Abstract

The internal structure of the fundamental Jovian decameter radio emission, the simple-shaped millisecond (S-)bursts have been investigated with the continued wavelet transform (CWT) technique. The wide-band data taken for the present analysis have been obtained with the high-frequency and high-time-resolution equipment of a digital spectropolarimeter (DSP) and a waveform receiver installed on the world's largest decameter band radio telescope UTR-2 within the frame of a joint Ukraine-France-Austria-Russia INTAS project. In the wavelet spectra of the investigated events clear signatures of microsecond modulations have been found. These microsecond structures of simple Jovian S-bursts open new perspective on the development of a possible generation mechanism theory, which is briefly discussed.