Crowdsourced air traffic data from The OpenSky Network 2020 [CC-BY]

<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> Creative Commons CC-BY The only difference with the original dataset comes from anonymised aircraft information. <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>aircraft_uid</strong>: a unique anonymised identifier for aircraft; <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> 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# 研究动机 本数据集的数据源自完整的开放天空数据集（OpenSky Dataset）并经清洗处理，用于展示新冠疫情期间航空交通的发展态势。数据集覆盖2019年1月1日以来，该网络2500余个监测节点记录的所有航班数据。后续将定期补充数据，直至新冠疫情结束。 # 授权协议 采用知识共享署名许可协议（Creative Commons CC-BY）。本数据集与原始数据集的唯一差异在于对航空器信息进行了匿名化处理。 # 免责声明 本文件所提供的数据均按现状交付。尽管我们已尽力排查潜在问题，但仍可能存在部分错误信息。起讫机场的信息基于进离场阶段的自动相关监视广播（ADS-B）航迹在线计算得出，未与外部数据源进行交叉校验。当无法识别对应机场时，**出发地**或**目的地**字段将留空。航空器信息取自开放天空航空器数据库（OpenSky Aircraft Database）；若数据库中无对应航空器记录，则**机型代码**与**注册号**字段将留空。 # 数据集详情 本数据集按月以CSV格式文件提供，各文件包含以下特征字段： - **呼号（callsign）**：空中交通管制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、DLH代表汉莎航空等） - **航班号（number）**：航班的商业编号，如有可用信息（呼号与航班号的匹配关系来自公开开放API） - **航空器唯一标识（aircraft_uid）**：航空器的匿名化唯一标识符 - **机型代码（typecode）**：航空器型号代码（如有可用信息） - **出发地机场代码（origin）**：航班出发机场的四位字母代码（如有可用信息） - **目的地机场代码（destination）**：航班目的地机场的四位字母代码（如有可用信息） - **首次观测时间（firstseen）**：开放天空网络接收到的第一条航空器报文的UTC时间戳 - **末次观测时间（lastseen）**：开放天空网络接收到的最后一条航空器报文的UTC时间戳 - **观测日期（day）**：最后一条航空器报文接收时的UTC日期 - **第一位置纬度（latitude_1）**、**第一位置经度（longitude_1）**、**第一位置高度（altitude_1）**：航空器首次被探测到的位置信息 - **最后位置纬度（latitude_2）**、**最后位置经度（longitude_2）**、**最后位置高度（altitude_2）**：航空器最后一次被探测到的位置信息 # 示例 可通过以下页面查看该数据集的可视化样例与更详细的说明：<https://traffic-viz.github.io/scenarios/covid19.html> # 致谢 马丁·斯特罗迈尔（Martin Strohmeier）、泽维尔·奥利弗（Xavier Olive）、亚尼斯·吕贝（Jannis Lübbe）、马蒂亚斯·谢弗（Matthias Schäfer）与文森特·伦德尔斯（Vincent Lenders）。 论文《来自开放天空网络的众包航空交通数据（2019–2020）》发表于《地球系统科学数据（Earth System Science Data）》2021年第13卷第2期，DOI：10.5194/essd-13-357-2021