Height precision tests and analysises of Suzhou 3D GNSS Continuous Operational Reference System
SZ-GNSS CORS is an important urban infrastructure, of which the height datum is the focus. By se-lecting the benchmark points in Suzhou GNSS control networks, we made the precision leveling, static GPS ob-servation and GPS RTK observation. Then we processed and analyzed the observation data. The results show that SZ-GNSS CORS refining geoid surface model performs well and can generally replace traditional leveling. SZ-GNSS CORS can satisfactorily meet the demands of Suzhou urban construction and informatization construction to height datum.