1. TianQin Research Center for Gravitational Physics & School of Physics and Astronomy, Sun Yat-sen University (Zhuhai Campus), Zhuhai 519082, P.R. China
2. Centre for Gravitational Experiments, School of Physics, MOE Key Laboratory of Fundamental Physical Quantities Measurement & Hubei Key Laboratory of Gravitation and Quantum Physics, PGMF, Huazhong University of Science and Technology, Wuhan 430074, P.R. China
3. SISSA, Via Bonomea 265, 34136 Trieste, Italy and INFN Sezione di Trieste & IFPU – Institute for Fundamental Physics of the Universe, Via Beirut 2, 34014 Trieste, Italy
4. Former Faculty, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129, Torino, Italy
5. Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China
6. School of Physical Science and Technology, Southwest University, Chongqing 400715, China
7. Beijing Institute of Control Engineering, Beijing 100094, P.R. China
8. SUPA, School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, UK
9. DFH Satellite Co., Ltd., Beijing 100094, P.R. China
10. National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
11. School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, China
12. School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, United Kingdom
13. Center for High Energy Physics & Department of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, No. 5 Yiheyuan Rd, Beijing 100871, P.R. China
14. Lomonosov Moscow State University, Sternberg Astronomical Institute, Moscow 119992, Russia
15. Dipartimento di Fisica “G. Occhialini”, Universitá degli Studi Milano Bicocca, Piazza della Scienza 3, I-20126 Milano, Italy
16. School of Aeronautics and Astronautics, Shanghai Jiao Tong University, Shanghai 200240, China
17. Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210023 & School of Astronomy and Space Science, University of Science and Technology of China, Hefei, Anhui 230026, P.R. China
18. Max-Planck-Institut für Gravitationsphysik (Albert-Einstein-Institut), D-30167 Hannover, Germany
19. Leibniz Universität Hannover, D-30167 Hannover, Germany
20. Beijing Institute of Spacecraft System Engineering, Beijing 100094, P.R. China
21. Department of Physics, College of Sciences & MOE Key Laboratory of Data Analytics and Optimization for Smart Industry, Northeastern University, Shenyang 110819, China