Funding for this research was provided by:
European Space Agency (4000118382/16/I-EF)
Academy of Finland (314664)
National Aeronautics and Space Administration (NNX16AK88G)
Japan Society for the Promotion of Science (18H01270, 18H04446)
Japan Society for the Promotion of Science (17KK0095)
Article History
Received: 18 March 2020
Accepted: 28 September 2020
First Online: 15 October 2020
Competing interests
: The authors declare that they have no conflict of interest.