1. Chai H, Pan Z, Cui Y (2016) Research progress on GNSS multi-system combination precision positioning. Ocean Mapp 36(4):21–26
2. Fu F (2016) Current status and development trend of mobile phone chip development. Eng Technol: Cit Version (7):00031
3. He H , Yang Y, Sun Z (2012) Comparative analysis of several GPS velocity measurement methods 31(3):217–221
4. Li X (2013) Research on GNSS precise point positioning and fast determination of non-difference ambiguity. Wuhan University
5. Gill M, Bisnath S, Aggrey J, Seepersad G (2017) Precise point positioning (PPP) using low-cost and ultra-low-cost GNSS receivers. In: Proceedings of ION GNSS 2017, Portland, Oregon, pp 85–100 September 2017