To very accurate measurement, can consider to choose accurate frequency fiducial.
对于很是切确的测量，能够思忖选择切确的频率基准。
The relative uncertainty of the measurement is 0.646% when the fiducial probability is about 95%, which can meet the needs of the stray light measurement.
窄带滤光片法测量不确定度为0.646%（置信概率约为95%），能满足星载成像光谱仪杂散光测量的工程需要。
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