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。
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.
零位走动量即瞄准线射击前后变化量，是光学瞄具稳定性定量评价指标。
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