Comparison between the light curves from January 2022 to January 2025 derived from the baseline-calibrated FSI data (green), the ITI translated data (red), and the reference AIA data (blue), including training data. The shaded-blue area corresponds to ±1σ error range from AIA. In a) the first panel corresponds to the 171 Å and the second to the 304 Å channel. The light curves were co-aligned in longitude using the separation angle between the SDO and Solar Orbiter spacecraft shown in the third panel. In b) the coordinate system is shown, with the shaded-gray area corresponding to the shaded-gray area in a), indicating that Solar Orbiter was located on the solar far side and thus not observing the same regions of the Sun as SDO.