本文提出了估算静止通信卫星各分系统生产成本、整星成本和空间活动总成本的数学模型。
This paper proposes a model for estimating the cost of sub-systems of a communication satellite.
只是一个小townhouse - sized本周指定TD 54小行星2010年由美国在海拔略读仅仅在几千英里以上我们的地球静止轨道通信卫星。
Just this week a small townhouse-sized asteroid designated 2010 TD54 skimmed by us at an altitude just a few thousand miles above our geostationary communication satellites.
1990年初开始提出利用静止轨道以外的其他轨道通信卫星的设想，最好是利用低轨道(LEO)卫星。
Now in the 1990's it have been growing in using orbits other than the geostationary orbit for telecommunications satellites. It is the best approach to use the Low Earth orbit (LEO) satellites.
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