The magnetic sun from different views: A comparison of the mean and background magnetic field observations made in different observatories and in different spectral lines

A comparison is made of observational data on the mean magnetic field of the Sun from several observatories (a selection of published information and new measurements). Results of correlation and regression analyses of observations of background magnetic fields at the STOP telescope of the Sayan solar observatory in different spectral lines are also presented. Results obtained furnish an opportunity to obtain more unbiased information about largescale magnetic fields of the Sun and, in particular, about manifestations of strong (kilogauss) magnetic fields in them.