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- W4225585126 abstract "Magnetography using magnetic sensitive lines is regarded traditionally as the main instrument for measuring the magnetic field of the whole Sun. Full polarized Stockes parameters ($I$, $Q$, $U$, $V$) observed can be used to deduce the magnetic field under specific theoretical model or inversion algorithms. Due to various reasons, there are often cross-talk effects among Stokes signals observed directly by magnetographs. Especially, the circular polarized signal $V$ usually affects the linear polarized ones $Q$ and $U$ seriously, which is one of the main errors of the value of the transverse magnetic field (parallel to the solar surface) that is related to $Q$ and $U$. The full-disk magnetograph onboard the Advanced Space based Solar Observatory (ASO-S/FMG) is designed to observe Stockes parameters to deduce the vector magnetic field. In this paper, the methods correcting the effects of cross-talk $V$ to $Q$ and $U$ are based on the assumption of perfectly symmetric Q and U and anti-symmetric Stokes V profiles and a new method to reduce the crosstalk effect under observation mode of FMG is developed. Through the test, it is found that the two methods have better effect in cross-talk removal in the sunspot region, and have better consistency. Addtionally, the developed methodcan be applied to remove the cross-talk effect using only one group of $Q$, $U$ and $V$ images observed at one wavelength position." @default.
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- W4225585126 date "2021-12-08" @default.
- W4225585126 modified "2023-10-05" @default.
- W4225585126 title "A Study on Correcting the Effect of Polarization Crosstalk in Full-Disk Solar Photospheric Magnetic Fields Observations" @default.
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