New Homogeneous Dataset of Solar EUV Synoptic Maps from SOHO/EIT and SDO/AIA
New Homogeneous Dataset of Solar EUV Synoptic Maps from SOHO/EIT and SDO/AIA
复制标题
来自 SOHO/EIT 和 SDO/AIA 的新均质太阳能 EUV 天气图数据集
DOI：
10.1007/s11207-019-1563-y
复制
发表时间：
2019
期刊：
影响因子：
2.8
通讯作者：
K. Mursula
中科院分区：
文献类型：
--
作者：
A. Hamada;T. Asikainen;K. Mursula
几十年来一直在绘制太阳极光紫外线强度的天气图，以显示太阳表面不同极光紫外线辐射的分布，每张地图代表卡林顿自转一周(即太阳自转一周)。本文介绍了一个新的太阳极光紫外线天气图数据集，该数据集基于太阳和日球层天文台/极紫外光成像望远镜(SOHO/EIT)和太阳动力学天文台/大气成像组件(SDO/AIA)的全盘图像。为了消除由于传感器退化引起的EIT和AIA EUV强度显著而复杂的漂移，我们构建了标准化强度尺度的天气图。我们描述了一种将SOHO/EIT图与SDO/AIA图均质化的方法，方法是将EIT强度直方图转换为AIA级。新地图涵盖1996年至2018年，分别有307张SOHO/EIT和116张SDO/AIA天气图。这些地图以四种极紫外波长提供了整个太阳表面的系统而均匀的图像，非常适合于研究长期的冕洞演化。
Synoptic maps of solar EUV intensities have been constructed for many decades in order to display the distribution of the different EUV emissions across the solar surface, with each map representing one Carrington rotation (i.e. one rotation of the Sun). This article presents a new solar EUV synoptic map dataset based on full-disk images from the Solar and Heliospheric Observatory/Extreme Ultraviolet Imaging Telescope (SOHO/EIT) and Solar Dynamics Observatory/Atmospheric Imaging Assembly (SDO/AIA). In order to remove the significant and complicated drift of EIT and AIA EUV intensities due to sensor degradation, we construct the synoptic maps in standardized intensity scale. We describe a method of homogenizing the SOHO/EIT maps with SDO/AIA maps by transforming the EIT intensity histograms to AIA levels. The new maps cover the years from 1996 to 2018 with 307 SOHO/EIT and 116 SDO/AIA synoptic maps, respectively. These maps provide a systematic and homogeneous view of the entire solar surface in four EUV wavelengths, and are well suited, e.g., for studying long-term coronal hole evolution.