The structure of network control system for LAMOST

The Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) is a large scientific and engineering project in China. It will become by its completion an astronomical survey telescope with largest field of view and most efficient observation in 4-m aperture or above telescopes in the world. The telescope will be able to acquire spectra from 4000 stars simultaneously. All these prformance features have brought about a tremendous challenge for the control system design. This paper presents the network structure for the control system with mass data and multitask circumstances, focusing on the strategy how to conduct subsystem control, environmental monitoring, time service and wireless remote monitoring & controlling, etc. A number of IT technologies have been utilized in the network system, such as real time database, GPS time ticking and GSM communication.