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本文介绍国外移动卫星通信系统经济性能研究的方法和结果,以及我们可以从中得到的启示。 全球的静止轨道(GEO)系统和低轨(LEO)系统空间段每分钟成本均在0.1美元左右,而后者略高于前者;同时,GEO的区域性与全球系统相比,前者的成本也只略高于后者;然而,LEO的区域性系统比其全球系统的空间段成本要高6倍。因此,区域性系统不宜采用LEO系统。 LEO系统的用户业务量分布很不均匀,系统总的容量很难充分应用。预计2000年只能建成1～2个LEO全球商用系统。
This article introduces the methods and results of the research on the economic performance of foreign mobile satellite communications systems and the enlightenment we can draw from them. The GEO and LEO space segment costs around US $ 0.1 per minute, while the latter is slightly higher than the former; at the same time, the GEO’s geography has a lower cost compared to the global system Slightly higher than the latter; however, LEO’s regional system costs 6 times more space than its global system. Therefore, regional systems should not adopt LEO system. LEO system user traffic distribution is very uneven, the system’s total capacity is difficult to fully apply. It is estimated that only 1-2 LEO global commercial systems will be completed in 2000.