Funding for this research was provided by:
National Natural Science Foundation of China (71573184)
the National Key Scientific Instrument and Equipment Development Project (2013YQ490879)
the Special Program of Office of China Air Traffic Control Commission (GKG201403004)
ORCID
Publication History
Received: 2017-04-05
Accepted: 2017-05-22
Crosschecked: 2018-07-08
Content Type
: Article
Copyright
: © Zhejiang University and Springer-Verlag GmbH Germany, part of Springer Nature 2018