The modern society is changing paradigm by the 4th industrial revolution. In these changes, the
importance of geospatial information leading to the fusion and connection of persons and objects is
increasing day by day. GNSS CORS(Continuously Operating Reference Station) plays a pivotal role in the
geospatial information by providing basic data for surveying control points, mapping, navigation, geophysical
research, and so on. On the other hand, the satellite surveying technologies are developing rapidly and it is necessary to investigate the status of the satellite surveying environment and search for future directions. In
this study, the environment related to satellite survey by operation status of domestic and overseas
CORS(Continuously Operating Reference Station) was tried to analyze. Through the research, The operation
status of NGII and IGS CORS were presented. It was found that the availability ratio of multiple satellites
to the CORS of NGII are lower than that of IGS CORS. Considering the improvement of positioning
performance by using multiple GNSS, it is necessary to use multi-satellites in the future.