今年以来,全球已有多个国家竞相发射导航卫星。美国第9颗、第10颗GPS-2F导航卫星于今年3月和7月先后升空。同是3月,欧洲第7颗和第8颗“伽利略”导航卫星升空。也是在3月,印度第4颗导航卫星——印度区域导航卫星-1D升空。那么,为何这么多国家都要竞相发射各自的导航卫星呢?全球不能共享一个卫星导航系统吗?究其原因,卫星导航系统不仅能大大增强一国的国防实力,而且在保障国家经济安全和独立自主等方面也发挥着重要作用。为此,各国均很重视卫星导航系统的建设,努力探索和发展拥有自主知识产权的卫星导航系统,以免受制于人。 Since this year, many countries in the world have been racing to launch navigation satellites. The 9th and the 10th GPS-2F navigation satellite in the United States went on air in March and July this year. In March, the 7th and the 8th “Galileo” navigation satellites in Europe were launched. Also in March, India’s fourth satellite, India’s NNS-1D, took off. So why so many countries are competing to launch their own navigation satellite? Global can not share a satellite navigation system? The reason, satellite navigation system can not only greatly enhance a country’s national defense strength, but also in the protection of national economic security and independence Etc. also play an important role. Therefore, all countries attach great importance to the construction of satellite navigation systems and strive to explore and develop satellite navigation systems with independent intellectual property rights so as to avoid being controlled by others.