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We present a new correlation method for deriving the F-corona intensitydistribution, which is based on the analysis of the evolution of the total andpolarized visible light (VL) images. We studied the one-month variationprofiles of the total and polarized brightness acquired with Large AngleSpectrometric COronagraph (LASCO-C2) and found that in some regions they arehighly correlated. Assuming that the F-corona does not vary significantly on atimescale of one month, we estimated its intensity in the high-correlationregions and reconstructed the corresponding intensity maps both during thesolar-minimum and solar-maximum periods. Systematic uncertainties wereestimated by performing dedicated simulations. We compared the resultingF-corona images with those determined using the inversion technique and foundthat the correlation method provides a smoother intensity distribution. We alsoobtained that the F-corona images calculated for consecutive months show nosignificant variation. Finally, we note that this method can be applied to thefuture high-cadence VL observations carried out with the Metis/Solar Orbitercoronagraph.

Measuring the F-corona intensity through time correlation of total and polarized visible light images