Modelling total solar irradiance since 1878 from simulated magnetograms

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Table 1

Free parameters of the model that provide the best fit to the total photospheric flux and the total solar irradiance, and their allowed ranges.

Parameter	Notation	Value	Range

AR^a scaling factor	a	0.68	0–1
ER^b amplitude factor	X	0.62	0.5–1.2
ER cycle extension [years]	c _x	7.45	5–9
Saturation flux of faculae [G]		513	100–600
Saturation flux of ER [G]		813	500–1200

Notes.

^(a)

Active region;

^(b)

ephemeral region.

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