图为珠海航展上展出的北斗全球卫星导航系统规划模型（11月14日摄）。11月14日，北斗全球卫星导航系统规划模型亮相第九届中国国际航空航天博览会，引起业内人士极大关注。北斗全球卫星导航系统由我国自主研制，计划由30颗卫星组成，目前已成功发射16颗。该系统具有星间链路和自主导航功能，预计于2020年完成全球系统组建任务。新华社记者 梁旭 摄     The graph is on display at the zhuhai airshow dipper of the global satellite navigation system planning model(On November 14 perturbation).On November 14,Beidou global satellite navigation system planning model at the ninth China international aerospace exposition,Cause the personage inside course of study great attention.Beidou global satellite navigation system by independent research in our country,Plan by 30 satellite composition,At present already successful launch and single.The system has a star between link and autonomous navigation function,In 2020 is expected to complete a task global system.Xinhua news agency reporters LiangXu perturbation

    图为珠海航展上展出的北斗全球卫星导航系统规划模型（11月14日摄）。新华社记者 梁旭 摄     The graph is on display at the zhuhai airshow dipper of the global satellite navigation system planning model(On November 14 perturbation).Xinhua news agency reporters LiangXu perturbation

    图为珠海航展上展出的北斗全球卫星导航系统规划模型（11月14日摄）。新华社记者 梁旭 摄     The graph is on display at the zhuhai airshow dipper of the global satellite navigation system planning model(On November 14 perturbation).Xinhua news agency reporters LiangXu perturbation