The purpose of autofocusing is to remove the radial motion effect of the target from radar echoes, and only reserve the stepped frequency effect which is the basis of synthetic HRR capability.

自聚焦的目的是从雷达回波中消除目标径向运动的影响，只保留步进频率的影响，而后者是合成hrr能力的基础。

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And it was proposed by my thesis advisor Professor Weisskopf that we work on this problem to understand the effect of the impurities in scattering electrons and interfering with their motion.

VOA: special.2010.11.09

The motion in effect removes him as head of government in the British overseas territory.

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For the motion to take effect the decision must be ratified by the full council on 3 December.

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Special projectors can also be used to show the effect of proper motion, which causes the shapes of the constellations to change over time.

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