National Astronomical Observatories / Yunnan Observatory;
CAS;
Kunming 650011;
China;
Key Laboratory of Solar Activity;
National Astronomical Observatories;
Chinese Academy of Sciences;
Beijing 100012;
China;
Department of Physics;
Yunnan Normal University;
Kunming 650093;
China;
Research Center for Analysis and Measurement;
Kunming University of Science and Technology;
Kunming 652094;
China;