In modern photoelectric fire-control and guidance systems, the sighting line is often required to be stabilized to reduced the effect of carrier turbulence.
在现代光电火控、制导系统中，为了提高命中精度常常要求对瞄准线进行稳定，减小载体扰动的影响。
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The variational momentum of the zero position is that the sighting line of object space changing quantity after the fire, is the quantitative evaluation target of the optic aiming device.