Lomb–Scargle Analysis of 30 years of Data from the Nançay Decameter Array: Evolution of the Periodicity of Jovian Decametric Emissions

We investigate the long-term evolution of the periodicity of Jupiter's decametric radio emissions over the 1990–2020 period, using data from the Nançay Decameter Array and an extended version of the Marques et al. (2017a)'s catalogue. We apply a Lomb-Scargle analysis to characterize temporal variations in the radio signal's periodicity. The results show that the radio periodicity of Jovian auroral and Io-induced emissions has been stable over 30 years, with variations on an annual scale.