Abstract: TheGround-based Space Environment Monitoring Network，called Chinese Meridian Project for short, is a ground-based monitoring network system for the near earth space environment, which deployed geomagnetic (electrical) monitoring instruments, conventional radio monitoring instruments, large-scale radio monitoring instruments, cosmic ray monitoring instruments, optical monitoring equipment and interplanetary monitoring instruments in 15 observations along 120ºE and 30ºN. It continuously monitors the middle and upper atmosphere, ionosphere and magnetosphere above 20-30 km of the earth's surface to hundreds of kilometers, as well as the solar wind in interplanetary space, which is more than ten terrestrial radii away from the Earth. The Chinese Meridian Project produces wind field, density, temperature, and composition of the middle and upper atmosphere, and the bulk speed in the ionosphere, magnetosphere, and interplanetary solar wind, totally 163 datasets, from 2010 to today. The data of the Chinese Meridian Project provides important support for the study of the characteristics of the space environment over China, the propagation of space weather events along the meridian chain, and the coupling between different domains of geospace environment, and greatly promotes the development of various existing geospatial models, and provides many operational data support for manned spaceflight and lunar exploration missions in China.
Keywords: the Meridian Project; space weather; ground-based observation; data sharing policy