Nishizuka, Naoto http://orcid.org/0000-0002-1050-7863
Kubo, Yûki
Sugiura, Komei http://orcid.org/0000-0002-0261-0510
Den, Mitsue http://orcid.org/0000-0002-8111-635X
Ishii, Mamoru
Funding for this research was provided by:
New Energy and Industrial Technology Development Organization
Ministry of Internal Affairs and Communications (''Promotion of observation and analysis of radio wave'' commissioned research)
KAKENHI (JP18H04451)
Article History
Received: 7 August 2020
Accepted: 17 February 2021
First Online: 5 March 2021
Competing interests
: The authors declare that they have no competing interests.