Simulation and analysis of co-phasing errors of the segmented primary mirror in JUST

Jiao Tong University Spectroscopic Telescope(JUST) is of great significance to Chinese astronomy. The 4.4-meter primary mirror of JUST will adopt segmented mirror active optics to realize co-phasing in near-infrared bands. Co-phasing errors of segmented primary mirror tiled by hexagonal segments are successfully calculated for JUST. Besides, Co-phasing errors including out-plane errors are simulated lonely and comprehensively, so that a lot of simulation results are successfully received which lay a solid foundation for JUST.