MDI active region evolution videos for BARD catalog

Citation and Acknowledgements Please cite both this database the paper describing it, as well as adding the following acknowledgement: "The BARD catalog of BMRs was downloaded from the solar dynamo dataverse (https://dataverse.harvard.edu/dataverse/solardynamo), maintained by Andrés Muñoz-Jaramillo." Database citation format is shown at the top of this page, underneath the database title. It can be downloaded in a variety of formats directly from this page The papers describing this database are S. Chatterjee, A. Munoz-Jaramillo, & D. Lamb. Human-efficient labeling of a solar flux emergence video dataset by a deep learning model, 27 May 2021, PREPRINT (Version 1) available at Research Square https://doi.org/10.21203/rs.3.rs-366908/v1 A. Munoz-Jaramillo, Z. A. Werginz, J. P. Vargas-Acosta, M. D. DeLuca, J. C. Windmueller, J. Zhang, D. W. Longcope, D. A. Lamb, C. E. DeForest, S. Vargas-Dominguez, J. W. Harvey, & P. C. H. Martens , IEEE International Conference on Big Data, 3194 (2016). https://ieeexplore.ieee.org/document/7840975 A. Munoz-Jaramillo, B. Navarrete, & L. A. Campusano , The Astrophysical Journal, Volume 920, Issue 1, id.31, 11 pp. https://ui.adsabs.harvard.edu/abs/2021ApJ...920...31M Main Limitations The main limitations of these data are: Videos are assembled in a constant Carrington rotation frame so, BMRs may drift within the video due to differential rotation. Many videos have gaps and thus, do not have a constant cadence. We addressed this by interpolating the missing frames. In these videos we do not include interpolated frames. Description The Active Region (AR) magnetic evolution videos are created by - Projecting full-disc line-of-sight magnetograms into Carrington grid Dividing the projected maps into 15 degrees x 15 degrees non-overlapping patches. Each patch is sampled into 90 pixels x 90 pixels resulting into pixel scale of (1/6) degree Stacking a set of consecutive frames covering about half a solar rotation tied to each AR from Bipolar Active Region Detection (BARD) catalogue A total of 2453 videos are available over the period 1996 - 2011 in 'fits' format. Within the 'fits' header- 'NAXIS1' represents number of x-pixels 'NAXIS2' represents number of y-pixels 'NAXIS3' represents number of frames 'TIMEXXXX' represents the time stamp for frame XXXX in YYYY-MM-DDTHH:MM:SS format 'CRVAL1' represents the starting Carrington Longitude (degrees) for each video 'CRVAL2' represents the starting Latitude (degrees) for each video Each video is manually verified and a label of '0' or '1' is added to the name of video with '0' representing 'no new AR emergence within the video' and '1' representing 'AR emergence'.

引用与致谢说明
请同时引用本数据库及其相关描述论文，并添加如下致谢语："本双极磁区（Bipolar Magnetic Regions, BMRs）BARD目录下载自太阳发电机数据库（solar dynamo dataverse，https://dataverse.harvard.edu/dataverse/solardynamo），该库由Andrés Muñoz-Jaramillo维护。"
数据库引用格式详见本页面数据库标题下方区域。用户可直接通过本页面以多种格式下载该数据集。
相关描述论文包括：
1. S. Chatterjee、A. Muñoz-Jaramillo与D. Lamb发表于2021年5月27日的预印本（版本1）《基于深度学习模型实现太阳通量涌现视频数据集的人工高效标注》，可在Research Square平台获取：https://doi.org/10.21203/rs.3.rs-366908/v1
2. A. Muñoz-Jaramillo、Z. A. Werginz、J. P. Vargas-Acosta、M. D. DeLuca、J. C. Windmueller、J. Zhang、D. W. Longcope、D. A. Lamb、C. E. DeForest、S. Vargas-Dominguez、J. W. Harvey与P. C. H. Martens发表于2016年IEEE国际大数据会议的论文，页码3194，链接：https://ieeexplore.ieee.org/document/7840975
3. A. Muñoz-Jaramillo、B. Navarrete与L. A. Campusano发表于《天体物理学杂志》2021年第920卷第1期（文章编号31，共11页）的论文，链接：https://ui.adsabs.harvard.edu/abs/2021ApJ...920...31M

主要局限性
本数据集存在以下主要局限性：视频采用固定卡林顿自转坐标系拼接生成，因此双极磁区可能因较差自转在视频中产生漂移；多数视频存在帧间隙，无法保持恒定的采样帧率。针对该问题，我们曾尝试通过插值补全缺失帧，但本数据集所提供的视频均未包含插值补全的帧。

数据集说明
本活动区（Active Region, AR）磁演化视频的制作流程如下：
1. 将全日面视向磁图投影至卡林顿网格坐标系；
2. 将投影后的磁图划分为15°×15°的非重叠区块，每个区块采样为90×90像素，最终像素尺度为(1/6)°；
3. 从双极活动区检测（Bipolar Active Region Detection, BARD）目录中，选取与每个活动区相关的、覆盖约半个太阳自转周期的连续帧序列，堆叠生成视频。
1996年至2011年间，共提供2453段FITS格式的活动区演化视频。
FITS文件头中各关键字的含义如下：
- NAXIS1：X方向像素总数；
- NAXIS2：Y方向像素总数；
- NAXIS3：视频总帧数；
- TIMEXXXX：第XXXX帧的时间戳，格式为YYYY-MM-DDTHH:MM:SS；
- CRVAL1：单段视频起始卡林顿经度（单位：°）；
- CRVAL2：单段视频起始卡林顿纬度（单位：°）。
所有视频均经过人工校验，并在文件名中添加标签'0'或'1'：其中'0'表示视频时段内无新活动区涌现，'1'表示视频时段内存在活动区涌现。