Wang, Jin
Zhang, Qin
Huang, Guanwen
Funding for this research was provided by:
The National Key Research and Development Program of China (2018YFC1505102)
the Programs of the National Natural Science Foundation of China (41774025, 41731066)
the Special Fund for Technological Innovation Guidance of Shaanxi Province (2018XNCGG05)
the Special Fund for Basic Scientific Research of Central Colleges (CHD300102269305, CHD300102268305)
the Grand Projects of the Beidou-2 System (GFZX0301040308)
Article History
Received: 24 August 2020
Accepted: 2 February 2021
First Online: 17 May 2021
Competing interests
: The authors declare no conflicts of interest.