4. TT China has established an integrated TT network comprising TT ground stations and ships,which has successfully accomplished TT missions for near-earth orbit and geo-stationary orbit satellites,and experimental spacecraft.

• 4.；航天测控。中国已建成完整的航天测控网，包括陆地测控站和海上测控船，圆满完成了从近地轨道卫星到地球静止轨道卫星、从卫星到试验飞船的航天测控任务。