First Analysis of the Effect of the Jovicentric Declination of the Earth on the Observation of Jovian Decametric Radio Emissions

Abstract

Through analysis of the extensive catalog of the Nan cay Decameter Array, from 1978 to 2020, we demonstrate that the effect of the variation of the Jovicentric declination of the Earth on the visibility of Jovian decametric radio emissions by ground-based instruments is combined with the effects of variation of the Earth-Jupiter distance and of Jupiter's elongation. Therefore, these superimposed effects must be considered and removed for the study of the pure effect of the declination on the emissions' visibility.