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今年是人类征服太空的第25年。25年来,航天技术的硕果已经在各个领域得到了广泛的应用,特别是通信、导航、资源探测、军事侦察和气象观测等方面取得了明显可见的经济效益。以国际通信卫星为例,1966年第一代国际通信卫星晨鸟,每年每话路的成本超过了20000美元,而今天的西联星同样一条话路的年成本只要200美元,10多年内成本降低了100倍!但是这一价格还不是最终的。今后十多年内,随着
This year marks the 25th anniversary of human conquest of space. Over the past 25 years, the achievements of aerospace technology have been widely used in various fields. In particular, obvious economic benefits have been achieved in areas such as communications, navigation, resource exploration, military reconnaissance and meteorological observation. Take the international communications satellite as an example. In 1966, the first generation of international communications satellite morning birds cost more than 20,000 U.S. dollars per year. However, the cost of a similar road to Western Star today is only 200 U.S. dollars, reducing costs over 10 years 100 times! But the price is not the end. In the next ten years, with