An assimilative method to real-time update the IRI model for space-weather purposes.
Pignalberi A., Pezzopane M.
The knowledge of accurate solar indices is essential to reliably forecast the conditions of the near-Earth space environment. The International Reference Ionosphere (IRI) empirical model, based on R12 and IG12 solar indices, provides a climatological depiction of the ionospheric plasma that can be different from the real one, especially at solar terminator and for disturbed conditions. Assimilating data from a grid of ionosondes is possible to obtain effective values of R12 and IG12 that can significantly improve the electron density representation made by the IRI model. Kriging interpolation method is employed for spatial mapping these indices.