ADS-B flight data of German HEMS helicopters (Airbus EC135) from 2017-2021 The data set was used for research at the Institute of Flight Systems and Automatic Control at the the Technical University of Darmstadt. Information on the research and a data overview can be found in the paper "Usage Monitoring of Helicopter Gearboxes with ADS-B Flight" The data set contains: 1) Processed ADS-B data of German Helicopter Emergency Medical Services (HEMS) / rescue helicopters in the time period 01.01.2017 to 31.12.2021. The data was extracted with the ICAO 24-bit transponder codes of German HEMS helicopters researched for the project. It focusses on the Airbus EC135 helicopter types and does not include any other rescue missions. The data is processed and only containing helicopters that sent their position information with ADS-B. it is summarized in csv files for each month (60 files). The data used in the paper from two helicopter stations CHX31 and CHX45 with five flights each, is in the files "chx31_five_flights.csv" and "chx45_five_flights.csv". Source: OpenSky Network https://opensky-network.org/ Matthias Schäfer, Martin Strohmeier, Vincent Lenders, Ivan Martinovic and Matthias Wilhelm. "Bringing Up OpenSky: A Large-scale ADS-B Sensor Network for Research". In Proceedings of the 13th IEEE/ACM International Symposium on Information Processing in Sensor Networks (IPSN), pages 83-94, April 2014. Tools: Traffic Python Package https://traffic-viz.github.io/ 2) Metadata - "HEMS_EC135_Helicopters_Germany.csv": Researched information about EC135 HEMS helicopters. - "HEMS_Stations_Germany.csv": Researched information about German HEMS stations including their location and operator. - "LBA_Helipads_PIS.csv": Public Interest Sites - PIS / HeliPads at hospitals etc. Sources: - RTH Info: https://www.rth.info/index.php - ICAO 24 codes: http://www.airframes.org/ , http://www.helionline.net/060-127470-934254/photogallery/55/380/64570///D-HRTH.html , https://www.flightradar24.com/data/aircraft/d-hrta - Further Infos: https://bos-fahrzeuge.info/einsatzfahrzeuge/ - PIS: https://www.lba.de/DE/Luftfahrtunternehmen/Flugbetrieb/PIS/PIS_node.html (German Federal Aviation Office, LBA Luftfahrtbundesamt)