1. Bu, J., Chen, Y., Zuo, X., Chang, J., Li, X.: The multi-system combination PPP computational performance analysis based on the UofC model. Bull. Surv. Mapp. 0(11), 11–16 (2017)
2. Bu, J., Zuo, X., Chang, J., Li, X., Dong, G.: Analysis of PPP positioning performance of BDS/GPS/GLONASS/Galileo multi-system integration. J. Kunming Univ. Sci. Technol. 42(S1), 40–48 (2017)
3. Jin, L., Ji, Y., Tang, W., et al.: Development and application of BDS/GPS satellite data quality checking software. J. Geodesy Geodyn. 36(9):837–840,846 (2016)
4. Pan, L., Cai, C.: Software design and implementation for BeiDou data quality analysis. Eng. Surv. Mapp. 23(10), 67–71 (2014)
5. Yang, Z., Dai, W., Yu, W., Liao, J.: Quality aanlysis of GNSS date based on TEQC in different environments. J. Geodesy Geodyn. 30(05), 135–139 (2010)