SolO/EUI Data Release 4.0 2021-12

The Extreme Ultraviolet Imager (EUI) is part of the remote sensing instrument package of the ESA/NASA Solar Orbiter mission. The EUI consists of three telescopes, the Full Sun Imager (FSI) and two High Resolution Imagers (HRILYA, HRIEUV), which are optimised to image in Lyman-α and EUV (17.4 nm, 30.4 nm) to provide a coverage from chromosphere up to corona. EUI scientific data consists of calibrated and raw data images acquired by the three EUI telescopes. Following the orbit profile of Solar Orbiter, the data coverage, imaging cadence and effective spatial resolution of the EUI data are very variable. "SolO/EUI data release 3.0" contains the Solar Orbiter/EUI data recorded up till and including 2021 April 28. This period covers the Near Earth Commissioning Phase (NECP) and the first few months of Cruise Phase. This implies that most data is the result of technical tests, for which the instrument configuration was often non-nominal. Most data is therefore a-priori not suitable for scientific analysis but is instead primarily intended as a reference for the further development of analysis and visualisation software.

极紫外成像仪（Extreme Ultraviolet Imager, EUI）是欧洲空间局（ESA）/美国国家航空航天局（NASA）太阳轨道器任务遥感仪器包的一部分。EUI包含三台望远镜，即全日面成像仪（Full Sun Imager, FSI）和两台高分辨率成像仪（HRILYA、HRIEUV），它们经过优化，可在莱曼-α（Lyman-α）和极紫外（Extreme Ultraviolet, EUV）波段（17.4 nm、30.4 nm）成像，覆盖范围从色球层延伸至日冕。EUI科学数据包括三台EUI望远镜获取的校准数据图像和原始数据图像。根据太阳轨道器的轨道剖面，EUI数据的数据覆盖范围、成像频率和有效空间分辨率具有很大的可变性。SolO/EUI数据版本3.0包含截至并包括2021年4月28日记录的太阳轨道器/EUI数据。该时期涵盖近地调试阶段（Near Earth Commissioning Phase, NECP）和巡航阶段的最初几个月。这意味着大多数数据是技术测试的结果，在此期间仪器配置通常为非标称状态。因此，大多数数据先验地不适用于科学分析，而是主要用作进一步开发分析和可视化软件的参考。