Hünemohr, David. ADS-B flight data of German HEMS helicopters (Airbus EC135) from 2017-2021. (2022-05). CC BY-SA 4.0. Helicopter, Flight data, ADS-B, Helicopter Emergency Medical Services, HEMS, Germany, HUMS, smartHUMS, PHM, Usage Monitoring, FSR, 4.41-04 Verkehrs- und Transportsysteme, Intelligenter und automatisierter Verkehr, 380. Technical University of Darmstadt. 10.48328/tudatalib-959. https://tudatalib.ulb.tu-darmstadt.de/handle/tudatalib/3587