This paper introduce the mathematical model to realize the electronic analog computation to missile allowable launching distance and explain the transforming way of radar range scale.

介绍了为实现电子模拟运算导弹允许发射距离的数学模型，并说明了雷达距离比例尺的变换方法。

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U.S.officials say no part of the three-stage rocket reached orbit and the launching was a thinly-disguised test of a long-range ballistic missile that was banned under a 2006 U.N.resolution.

VOA: standard.2009.04.15

The Bush-era proposal called for the United States to set up a radar site in the Czech Republic and 10 missile interceptors in Poland to counter the threat of Iran launching long-range missiles at America's allies in Europe.

CNN: Obama scraps Bush-era missile defense for new plan