The higher accuracy of measuring the Doppler frequencies, the less error of the aperture distribution.

多普勒频率的测频精度愈高，反演口径分布的误差愈小。

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The jitter error brought in by the aperture jitter increases as the frequency increase of the input signal in high speed data acquisition systems, thus it degrades the system's SNR.

结果表明，孔径抖动引起的孔径误差随着高速数据采集系统输入信号频率的升高而增大，由此将引起系统信噪比的下降。

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A special test gauge for large aperture inner diameter and roundness is designed in this paper, and the gauge error is analyzed by calculating and determining its parameters.

介绍一种大孔径内径和圆度专用检验量具的设计，并通过计算确定该量具的设计参数并对该量具进行误差分析。

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