Estimation of the impact of solar flare spectra on the Earth’s ionosphere using the GAIA modelShinnosuke Kitajima, Kyoko Watanabe, Hidekatsu Jin, Chihiro Tao and Michi NishiokaJ. Space Weather Space Clim., 15 (2025) 10DOI: https://doi.org/10.1051/swsc/2025008