Global Meteor Network observations of Crew-5 Dragon trunk re-entry 2023-04-27

This dataset contains video observations by some stations of the Global Meteor Network of the re-entry of the Crew-5 dragon trunk above Arizona on 2023-04-27 around 08:52 UTC. There are several types of files: FF files: these are 10.24 second videos compressed in the four-frame format. They are just FITS files with four frames, containing per pixel 1) the maximum value over 256 frames 2) the frame nr (between 0 and 255) where the maximum occurred 3) the mean value of all 256 frames and 4) the RMS of the 256 values. FR files: compressed video recordings of detected fireballs. These can be read with the RMS software. MP4 files: rendered movies of combined FF and FR files for one station (more can be made with FR_binviewer from RMS software). Platepar-files: these contain astrometry corresponding to the FITS files. These can be interpreted by the RMS software. ECSV files: these contain manually picked points (with SkyFit2.py from RMS) along the track of the reentry. For each point, time and apparent coordinates are recorded. These files can be interpreted by the WesternMeteorPyLib trajectory solver. trajectory-points.txt: solutions from the trajectory solver. reentry-map-v4.png: a rendered map of the trajectory (made in QGIS). compilation.png: rendered version of the FF-files of most stations. The files can be processed with the software in https://github.com/CroatianMeteorNetwork/RMS and https://github.com/wmpg/WesternMeteorPyLib.本数据集包含全球流星网络（Global Meteor Network）的多个观测站，于2023年4月27日世界协调时约08:52，针对亚利桑那州上空Crew-5任务龙飞船货舱再入大气层过程所采集的视频观测数据。 文件类型包含以下几类： 1. FF文件：为时长10.24秒、采用四帧格式压缩的视频。其本质为包含四帧的FITS格式（Flexible Image Transport System）文件，每像素存储四类数据：①256帧中的最大亮度值；②出现最大值的帧序号（取值范围为0至255）；③全部256帧的亮度均值；④256帧数值的均方根（RMS）。 2. FR文件：为已探测到的火球的压缩视频录像，可通过RMS软件读取。 3. MP4文件：为单观测站的FF与FR文件合成后的渲染影片，可通过RMS软件中的FR_binviewer工具生成更多此类文件。 4. Platepar文件：存储与FITS格式文件对应的天体测量数据，可通过RMS软件解析。 5. ECSV文件：包含通过RMS软件的SkyFit2.py工具手动选取的再入轨迹点数据，每个点均记录了观测时间与视坐标，可通过WesternMeteorPyLib轨迹解算器处理。 6. trajectory-points.txt：轨迹解算器输出的解算结果文件。 7. reentry-map-v4.png：轨迹渲染地图，由QGIS制作生成。 8. compilation.png：多数观测站FF文件的合成渲染版本。 上述文件可通过https://github.com/CroatianMeteorNetwork/RMS与https://github.com/wmpg/WesternMeteorPyLib中的配套软件进行处理。