Crowdsourced air traffic data from The OpenSky Network 2020

<strong>Motivation</strong> The data in this dataset is derived and cleaned from the full OpenSky dataset to illustrate the development of air traffic during the COVID-19 pandemic. It spans all flights seen by the network's more than 2500 members since 1 January 2019. More data will be periodically included in the dataset until the end of the COVID-19 pandemic. <strong>License</strong> See LICENSE.txt <strong>Disclaimer</strong> The data provided in the files is provided as is. Despite our best efforts at filtering out potential issues, some information could be erroneous. Origin and destination airports are computed online based on the ADS-B trajectories on approach/takeoff: no crosschecking with external sources of data has been conducted.<br> Fields <strong>origin</strong> or <strong>destination</strong> are empty when no airport could be found. Aircraft information come from the OpenSky aircraft database. Fields <strong>typecode</strong> and <strong>registration</strong> are empty when the aircraft is not present in the database. <strong>Description of the dataset</strong> One file per month is provided as a csv file with the following features: <strong>callsign</strong>: the identifier of the flight displayed on ATC screens (usually the first three letters are reserved for an airline: AFR for Air France, DLH for Lufthansa, etc.) <strong>number</strong>: the commercial number of the flight, when available (the matching with the callsign comes from public open API) <strong>icao24</strong>: the transponder unique identification number; <strong>registration</strong>: the aircraft tail number (when available); <strong>typecode</strong>: the aircraft model type (when available); <strong>origin</strong>: a four letter code for the origin airport of the flight (when available); <strong>destination</strong>: a four letter code for the destination airport of the flight (when available); <strong>firstseen</strong>: the UTC timestamp of the first message received by the OpenSky Network; <strong>lastseen</strong>: the UTC timestamp of the last message received by the OpenSky Network; <strong>day</strong>: the UTC day of the last message received by the OpenSky Network; <strong>latitude_1</strong>, <strong>longitude_1</strong>, <strong>altitude_1</strong>: the first detected position of the aircraft; <strong>latitude_2</strong>, <strong>longitude_2</strong>, <strong>altitude_2</strong>: the last detected position of the aircraft. <strong>Examples</strong> Possible visualisations and a more detailed description of the data are available at the following page:<br> &lt;https://traffic-viz.github.io/scenarios/covid19.html&gt; <strong>Credit</strong> If you use this dataset, please cite: Martin Strohmeier, Xavier Olive, Jannis Lübbe, Matthias Schäfer, and Vincent Lenders<br> <strong>"</strong>Crowdsourced air traffic data from the OpenSky Network 2019–2020<strong>"</strong><br> <em>Earth System Science Data</em> 13(2), 2021<br> https://doi.org/10.5194/essd-13-357-2021<strong>背景说明</strong> 本数据集的数据源自完整OpenSky数据集并经清洗整理，旨在展示新冠疫情（COVID-19）大流行期间的空中交通变迁态势。数据集覆盖2019年1月1日起，该网络2500余名成员观测到的全部航班数据。本数据集将定期补充新增数据，直至新冠疫情大流行结束。 <strong>授权协议</strong> 详见LICENSE.txt文件 <strong>免责声明</strong> 本数据集文件所提供的数据均按"现状"交付。尽管已尽力过滤潜在问题，但仍可能存在部分错误信息。起降机场的信息基于进离场阶段的广播式自动相关监视（Automatic Dependent Surveillance-Broadcast, ADS-B）航迹在线计算得出，未与外部数据源进行交叉校验。若无法识别起降机场，则<strong>出发地（origin）</strong>与<strong>目的地（destination）</strong>字段将留空。航空器信息源自OpenSky航空器数据库，若数据库中无对应航空器记录，则<strong>机型代码（typecode）</strong>与<strong>航空器注册号（registration）</strong>字段将留空。 <strong>数据集详情</strong> 本数据集按月提供单个CSV（Comma-Separated Values）文件，包含以下字段： <strong>呼号（callsign）</strong>：空中交通管制（Air Traffic Control, ATC）屏幕上显示的航班识别码（通常前三位字母为航空公司代码：例如AFR代表法国航空、DLH代表汉莎航空等） <strong>航班号（number）</strong>：可获取的航班商业编号（与呼号的匹配关系来自公开开放API） <strong>ICAO24地址（icao24）</strong>：航空器应答机的唯一识别编号 <strong>航空器注册号（registration）</strong>：航空器尾号（可获取时提供） <strong>机型代码（typecode）</strong>：航空器型号代码（可获取时提供） <strong>出发地机场代码（origin）</strong>：航班出发机场的四位字母代码（可获取时提供） <strong>目的地机场代码（destination）</strong>：航班抵达机场的四位字母代码（可获取时提供） <strong>首次观测时间（firstseen）</strong>：OpenSky网络接收到的第一条航班报文的UTC时间戳 <strong>末次观测时间（lastseen）</strong>：OpenSky网络接收到的最后一条航班报文的UTC时间戳 <strong>观测日期（day）</strong>：OpenSky网络接收到最后一条报文当日的UTC日期 <strong>首检纬度（latitude_1）</strong>、<strong>首检经度（longitude_1）</strong>、<strong>首检高度（altitude_1）</strong>：航空器首次被探测到的位置信息 <strong>末检纬度（latitude_2）</strong>、<strong>末检经度（longitude_2）</strong>、<strong>末检高度（altitude_2）</strong>：航空器最后一次被探测到的位置信息 <strong>示例与参考</strong> 可通过以下页面查看该数据集的可视化示例与更详细说明：<br>https://traffic-viz.github.io/scenarios/covid19.html <strong>引用规范</strong> 若您使用本数据集，请引用以下文献：Martin Strohmeier、Xavier Olive、Jannis Lübbe、Matthias Schäfer 与 Vincent Lenders<br>《来自OpenSky网络的众包空中交通数据 2019–2020》<br>*地球系统科学数据（Earth System Science Data）* 13(2), 2021<br>https://doi.org/10.5194/essd-13-357-2021