发表文章1. Li B, Nie L, Ge H, Ge M, Yang L. Precise orbit determination of combined GNSS and LEO constellation with regional ground stations. ION GNSS+ 2017, Sept. 25-29 2017, Portland, OR, pp 2137-2147 [EI]
2. Nie L, Li B. Preciseorbit determination of combined GPS, BDS, GLONASS satellites and the LEO constellation with regional ground stations in China (CPGPS),2017 [EI]