TSI reconstructed from MD1 (top row) and SF (bottom row) Ca II K images versus the PMOD TSI composite. Left: Sunspot information taken from Mandal et al. (2020) without any correction to the faculae filling factors due to sunspots; Middle: Sunspot information taken from Mandal et al. (2020) and the sunspot filling factors are subtracted from the facular ones; Right: Sunspot information is derived from the full-disc RP red-continuum images. The red lines show linear fits to the data, while the black lines have a slope of unity. Also listed in each panel are the B_sat (in G), RMS difference (in W/m²), the linear correlation coefficient, and the slope of the linear fit.