Correlation analysis between vector magnetograms measured by S3T and MSFC

Abstract

By quantitative analysis of AR NOAA10484 two-dimensional Stokes spectra obtained from the Solar Stokes Spectral Telescope ( S 3 T) at the Yunnan Observatory, we have derived three components, the flux intensity B, the inclination γ and the azimuth χ of the vector magnetic fields in the AR. The contours of the flux intensity B have a basic agreement to the morphological configuration of the sunspot group in white-light. Comparing the vector magnetograms obtained by S 3 T and by the NASA/Marshall Space Flight Center (MSFC), basic agreement on the longitudinal and transverse components between the S 3 T and MSFC magnetograms is found, resulting in correlation coefficients ρ B ∥ = 0.904 , ρ Bt = 0.749 and ρ az = 0.941. There is a split of 241 mÅ between the two σ lines of Fe I 6302.5 Å which implies the field flux intensity near the center of the west umbra is 2600 G. This value is consistent with the result obtained by fitting the Stokes profiles.