他们仅限于在近地轨道运行，在那做着发射卫星或运送宇航员到国际空间站这样毫无任何浪漫色彩的工作。
They were confined to low-earth orbit, where they did the unglamorous job of launching satellites or ferrying astronauts to the International Space Station.
“大酒瓶”号将利用卡纳维拉尔角的航天飞机发射装置进行发射，它能运送80吨（81 280公斤）的载荷进入近地轨道。
The Magnum would use the space shuttle launch facilities at Cape Canaveral and could launch 80 tons (81, 280 kilograms) of payload into low Earth orbit (LEO).
确定了近地轨道的发射轨道优化设计方法 ，采用多重参数化法将轨迹最优控制问题转化为参数优化问题。
The optimization methods for launch trajectory of low earth orbit are discussed, and the optimal control problems are converted into parameter optimization problems by multiple parameterized methods.
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