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**数据集构建初衷** 本数据集的数据源自完整OpenSky数据集（OpenSky Dataset）并经过清洗处理，用于展示新冠疫情（COVID-19）大流行期间的空中交通发展态势。数据覆盖2019年1月1日起，该网络超2500个监测节点记录的所有航班。本数据集将定期增补数据，直至新冠疫情大流行结束。 **授权协议** 详见LICENSE.txt文件 **免责声明** 本文件中提供的数据均按现状提供。尽管我们已尽力筛选潜在问题，但仍可能存在部分错误信息。起降机场信息基于进近/离场阶段的ADS-B（自动相关监视广播，Automatic Dependent Surveillance-Broadcast）航迹在线计算得出，未与外部数据源进行交叉验证。当无法匹配到对应机场时，**origin**与**destination**字段将留空。航空器信息源自OpenSky航空器数据库。当数据库中无对应航空器记录时，**typecode**（机型代码）与**registration**（航空器注册号）字段将留空。 **数据集详情说明** 本数据集按月提供CSV格式文件，各文件包含以下字段： **callsign**（航班呼号）：空中交通管制（ATC，Air Traffic Control）屏幕上显示的航班标识符，通常前三位字母为航空公司代码，例如AFR代表法国航空（Air France）、DLH代表汉莎航空（Lufthansa）等。 **number**（航班商业编号）：可获取的航班商业编号（与呼号的匹配信息源自公开开放API）。 **icao24**：应答机唯一识别编号。 **registration**（航空器注册号）：可获取的航空器尾号（即注册号）。 **typecode**（机型代码）：可获取的航空器型号代码。 **origin**（起飞机场代码）：可获取的航班起飞机场四字代码。 **destination**（目的机场代码）：可获取的航班目的机场四字代码。 **firstseen**（首次监测时间）：OpenSky网络接收到的第一条航班报文的UTC时间戳。 **lastseen**（末次监测时间）：OpenSky网络接收到的最后一条航班报文的UTC时间戳。 **day**（监测日期）：OpenSky网络接收到最后一条航班报文的UTC日期。 **latitude_1**、**longitude_1**、**altitude_1**：航空器首次被监测到的纬度、经度与海拔高度。 **latitude_2**、**longitude_2**、**altitude_2**：航空器末次被监测到的纬度、经度与海拔高度。 **示例与拓展说明** 本数据集的可视化示例与更详细的数据说明可访问以下页面：https://traffic-viz.github.io/scenarios/covid19.html **引用说明** 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，"Crowdsourced air traffic data from the OpenSky Network 2019–2020"，发表于*Earth System Science Data* 13(2)，2021年，DOI：https://doi.org/10.5194/essd-13-357-2021