Abstract: As an important part of modern basic surveying and mapping, its technical means, tools and theoretical methods established and maintained by geodetic datum have changed greatly with the development of society and the progress of science. The Shanghai CORS system for satellite navigation positioning provides high-precision and stable location services for the Shanghai region through the use of grid-based virtual reference station (VRS) technology and the “seven-parameter release” operation mode serves a massive number of users. In this paper, the key technologies used in the construction of the SHCORS system are explored and studied, and its real-time positioning accuracy is tested. The results show that the SHCORS system's accuracy meets practical application requirements.

Key words: SHCORS, virtual reference station, massive concurrency, real-time local coordinates, distributed computing