Solar Physics ( IF 2.7 ) Pub Date : 2021-01-29 , DOI: 10.1007/s11207-021-01775-8 Dejian Liu , Sheng Zheng , Yao Huang , Yongyuan Xiang
The solar chromosphere data products of the New Vacuum Solar Telescope (NVST) have been affected by the interference fringes since its first operation. These fringes have a serious impact on the quality of NVST high-resolution data, which are reconstructed by short-exposure data. In order to improve the quality of NVST high-resolution data, this article proposes a method based on “Fringes Flat Field” to remove the interference fringes in NVST short-exposure data. We made the “Fringes Flat Field” using Adaptive Wavelet Transform (AWT) and Butterworth low-pass filter. The results of the experiments are satisfactory, and the method cannot only remove the fringes effectively, but keep the solar structures from being lost.
中文翻译:
基于“边缘平场”的新型真空太阳望远镜边缘去除
自从首次使用以来,新型真空太阳望远镜(NVST)的太阳色球数据产品就受到了干涉条纹的影响。这些边缘对NVST高分辨率数据的质量有严重影响,这些高分辨率数据是通过短曝光数据重建的。为了提高NVST高分辨率数据的质量,本文提出了一种基于“条纹平坦场”的方法来去除NVST短曝光数据中的干扰条纹。我们使用自适应小波变换(AWT)和巴特沃思低通滤波器制作了“边缘平坦场”。实验结果令人满意,该方法不仅可以有效去除条纹,而且可以防止太阳光结构的丢失。