A Study on Correcting the Effect of Polarization Crosstalk in Full-Disk Solar Photospheric Magnetic Field Observations
A Study on Correcting the Effect of Polarization Crosstalk in Full-Disk Solar Photospheric Magnetic Field Observations
复制标题
全盘太阳光球磁场观测中偏振串扰影响的校正研究
DOI：
10.1007/s11207-021-01933-y
复制
发表时间：
2021-12
期刊：
影响因子：
--
通讯作者：
Chen J.
中科院分区：
文献类型：
--
作者：
Liu S;Su JT;Bai XY;Deng Y. Y.;Chen J.
利用磁敏线的磁谱法历来被认为是测量整个太阳磁场的主要仪器。全极化Stokes参数（…）可用于推导特定理论模型或反演算法下的磁场。由于种种原因，磁振仪直接观测到的斯托克斯信号之间经常存在串扰效应。特别是圆极化信号通常会严重影响线极化信号，这是与和相关的横向磁场（平行于太阳表面）值误差的主要原因之一。先进天基太阳观测台（ASO-S/FMG）上的全盘磁力计被设计用于观测斯托克斯参数并推断磁场矢量。本文提出了基于完全对称和反对称Stokesprofiles假设的串扰校正方法，以及在FMG观测模式下降低串扰效应的新方法。通过测试，发现两种方法都能有效去除太阳黑子区域的串扰，且具有较好的一致性。此外，所开发的方法可以仅使用在一个波长位置观测到的一组图像来消除串扰效应。
Magnetography using magnetic sensitive lines is regarded traditionally as the main instrument for measuring the magnetic field of the whole Sun. Full polarized Stokes parameters (,,,) can be used to deduce the magnetic field under specific theoretical models or inversion algorithms. Due to various reasons, there are often cross-talk effects among Stokes signals observed directly by magnetographs. Especially, the circularly polarized signalusually seriously affects the linearly polarizedandsignals, which is one of the main errors in the value of the transverse magnetic field (parallel to the solar surface) that is related toand. The full-disk magnetograph onboard the Advanced Space based Solar Observatory (ASO-S/FMG) is designed to observe Stokes parameters and deduce the magnetic-field vector. In this article, the methods for correcting the effects of cross-talkonandbased on the assumption of perfectly symmetricandand anti-symmetric Stokesprofiles and a new method for reducing the crosstalk effect under observation mode of the FMG are developed. Through the test, it is found that the two methods are effective in cross-talk removal in the sunspot region and have better consistency. Additionally, the developed method can be applied to remove the cross-talk effect by using only one group of,andimages observed at one wavelength position.
登录
查看更多内容
DOI：
10.1117/12.138798
发表时间：
1992-12
期刊：
--
影响因子：
--
作者：
E. West;K. Balasubramaniam
通讯作者：
E. West;K. Balasubramaniam
DOI：
10.1086/313004
发表时间：
1997-06
期刊：
The Astrophysical Journal Supplement Series
影响因子：
--
作者：
A. Skumanich;B. Lites;V. Pillet;P. Seagraves
通讯作者：
A. Skumanich;B. Lites;V. Pillet;P. Seagraves
影响因子：
4.9
作者：
JEFFERIES, J;LITES, BW;SKUMANICH, A
通讯作者：
SKUMANICH, A
影响因子：
6.5
作者：
C. Beck;W. Schmidt;T. Kentischer;D. Elmore
通讯作者：
C. Beck;W. Schmidt;T. Kentischer;D. Elmore
先进天基太阳观测站（ASO-S）：概述
DOI：
10.1088/1674-4527/19/11/156
发表时间：
2019-11
期刊：
RAA
影响因子：
--
作者：
Gan Weiqun
通讯作者：
Gan Weiqun