Perturbations of Radiowave in the Ionosphere in response to Solar and Magnetospheric Stimuli – PRISMS

The aim of the PRISMS project is to develop a tool for modelling and predicting the effects on the Earth's ionized environment of electromagnetic emissions and particle ejection from the Sun. Through the PRISMS project, we ambition, by coupling individually validated models, to build an integrated model that will be able to propagate electromagnetic emissions from the Sun and plasma emissions from the solar wind, at the L1 Lagrange point, to the ionized space environment of Earth, with coupling functions adapted to ensure the delicate transmission at the interface between the solar wind and the terrestrial environment. This global model will be constrained by space observations, which will condition the coupling functions in order to better characterize the perturbation and its propagation. The model will evaluate the effects on the ionosphere dynamics of electromagnetic disturbances during solar flares and the effects associated with magnetic storms (corotating interaction regions and coronal mass ejections) and thereby the impact on radio communications through the propagation of electromagnetic waves in this environment. In addition, by developing a suitable module, the model will calculate the ground magnetic trace of these disturbances. At the end of the project, we will have implemented a prototype operational system that will have the ability to follow in near real-time the variations of electromagnetic solar emissions and of thje properties from the solar wind and to describe the disturbances induced by solar activity on the propagation of radio waves. This effort is part of a strategy of national independence with respect to modeling of the damaging effects of the Sun on the industrial, societal and military activities in France and more broadly on an European level.