NAOC Open IR
利用太阳自转提取全日面太阳望远镜的平场和偏振本底
白先勇1; 邓元勇1; 王怡然2; 刘四清2; 毛信杰1
2018
Source Publication科学通报
ISSN0023-074X
Volume063Issue:003Pages:301
Abstract平场和偏振本底改正是全日面单色像和偏振像数据处理的必要步骤.本文假设太阳自转一周过程中望远镜的平场和偏振本底不变,基于此从怀柔太阳观测基地第2144个卡林顿周的单色像和Stokes Q/I,U/I,V/I图像中利用中值算法提取出平场和Stokes I到Q,U,V的偏振本底.利用该方法提取的平场中包含一些小尺度的脏点、大尺度的光强不均匀性,提取的Stokes I到V的偏振本底成马鞍面分布,Stokes I到Q,U的偏振本底成倒钟形分布.平场改正后可以得到较理想的单色像.日面边缘偏振本底较大的宁静区扣除偏振本底后Stokes Q/I,U/I,V/I的平均值分别为-0.8×10~(-4),0.9×10~(-4),1.3×10~(-4),远小于改正前的-6.8×10~(-4),2×10~(-3),1.7×10~(-3).该方法无需定标观测,从常规观测数据中即可提取出平场和偏振本底,对天基、远程无人值守观测的数据标定具有重要的应用价值.
Language英语
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/53869
Collection中国科学院国家天文台
Affiliation1.中国科学院国家天文台
2.中国科学院空间科学与应用研究中心
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
白先勇,邓元勇,王怡然,等. 利用太阳自转提取全日面太阳望远镜的平场和偏振本底[J]. 科学通报,2018,063(003):301.
APA 白先勇,邓元勇,王怡然,刘四清,&毛信杰.(2018).利用太阳自转提取全日面太阳望远镜的平场和偏振本底.科学通报,063(003),301.
MLA 白先勇,et al."利用太阳自转提取全日面太阳望远镜的平场和偏振本底".科学通报 063.003(2018):301.
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