Funding for this research was provided by:
Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)
Article History
Received: 2 March 2020
Revised: 27 May 2020
Accepted: 29 July 2020
First Online: 28 August 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.