1. W. G. Gao, Y. T. Lin, G. C. Chen, and T. N. Meng, J. Geomat Sci. Tech. 31, 342 (2014).
2. L. Liu, Relativistic Theory of Time Transfer and Techniques of Clock Synchronization, Dissertation for the Doctoral Degree (Information Engineering University, Zhengzhou, 2004), p. 75.
3. L. Liu, L. F. Zhu, C. H. Han, X. P. Liu, and C. Li, Astron. Sin. 50, 189 (2009).
4. L. Liu, G. F. Tang, C. H. Han, X. Shi, R. Guo, and L. F. Zhu, Sci. China-Phys. Mech. Astron. 58, 089502 (2015).
5. P. Steigenberger, U. Hugentobler, S. Loyer, F. Perosanz, L. Prange, R. Dach, M. Uhlemann, G. Gendt, and O. Montenbruck, Adv. Space Res. 55, 269 (2015).