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1·Chapter 5 discusses on launch window.

第五章讨论了的窗口选择问题。

2·The launch window remains open for one hour and 43 minutes.

发射窗口有一小时43分钟。

3·For an Aug. 5 liftoff, the launch window opens at 8:34 a.m. PDT 11:34 a.m.

对于5号的发射而言，发射窗口在太平洋时间8点34分开始，一直到9点43分结束。

4·My next launch window for a European trip isn't until school is over in June.

直到六月学校放假才是我下次到欧旅行的有利时机。

5·In addition, an air launch promises a lot more scope to find a good launch window to get the spacecraft into orbit.

此外，空基发射可以为寻找“发射窗口”将航天器送入轨道，提供更多的机会。

6·Based on the characteristics of launch window, an algorithm to calculate the launch window for space rescue mission was deduced.

从发射窗口的基本特性出发，推导了空间救援任务发射窗口的解析求解方法。

7·Earth and Mars have to be at the right positions in their orbit for this method to work, and the launch window only comes around once every 25 months.

地球和火星都必须在其确定的轨道运行，在这种情况下，发射窗只能每25各月才有机会发射一次。

8·Moreover, the relation of initial launch condition and energy consumption is discussed in this paper, and the determination of launch window is given.

利用该算法进一步考虑初始时刻反卫星武器与目标卫星的位置关系和变轨消耗能量之间的关系，同时给出了发射窗口的求解算法。

9·Introduce the reference frame and time system used in orbit design particularly. Analyzed the orbit characteristic of two-body problem and launch window.

详细介绍了用于轨道设计的坐标系统和时间系统，分析了二体轨道特性和发射窗口的基本特性。

10·The launch window meeting the restriction of coplanar rendezvous and the characteristics of trans-lunar trajectory is obtained by precise dynamics model.

采用精确轨道动力学模型，得到了满足共面交会约束的发射窗口，以及地月转移轨道特性。