论文标题
新真空太阳能望远镜观察到的有翼Hα数据的共对象
The Co-alignment of Winged Hα Data Observed by the New Vacuum Solar Telescop
论文作者
论文摘要
自2021年4月以来，新的真空太阳能望远镜（NVST）一直在释放其新型的有翼HA数据（WHD），即HA成像光谱数据。与先前发布的版本相比，新数据在离波段图像中进一步共对准，并将其包装成标准的太阳能社区格式。在这项研究中，我们说明了小说WHD使用的比对算法，该算法主要基于光流方法，以获得翼图之间的翻译偏移。为了定量评估两个具有不同相似性的图像的对齐结果，我们分别计算出不同带和线中心的图像之间的对齐精度。结果表明，当机翼图像的外带低于0.6ȧ时，我们的对齐算法可能达到约0.1“的准确性。此外，我们详细介绍了WHD的最终产品，这可以为太阳能物理学家提供便利，以便使用高分辨率的Hα成像光谱数据NVST。
The New Vacuum Solar Telescope (NVST) has been releasing its novel winged Ha data (WHD) since April 2021, namely the Ha imaging spectroscopic data. Compared with the prior released version, the new data are further co-aligned among the off-band images and packaged into a standard solar physics community format. In this study, we illustrate the alignment algorithm used by the novel WHD, which is mainly based on the optical flow method to obtain the translation offset between the winged images. To quantitatively evaluate the alignment results of two images with different similarities, we calculate the alignment accuracies between the images of different off-band and line center, respectively. The result shows that our alignment algorithm could reach up to the accuracy of about 0.1 "when the off-band of winged image is lower than 0.6 Ȧ. In addition, we introduce the final product of the WHD in detail, which can provide convenience for the solar physicists to use high-resolution Hα imaging spectroscopic data of NVST.
