Comparison of the integrated (200–2400 nm) SIM (iSSI) + 52.13 Wm⁻² (red) to the TSIS-1 TIM measured TSI (blue) covering the year 2022 (January 1, 2022–February 1, 2023). This shows the excellent agreement for both the annual trending as well as the short-term (solar rotational) structure during activity in SC25. Note that some differences are due to sampling differences in the interpolation of the measurements to a common temporal grid (due to the different timing of the daily observations). Small data gaps for each instrument are specific to ISS activities that preclude measurements and are different for each sensor.