再论分光总日射表的校准

PURTHER STUDY ON CALIBRATION OF FURTHER STUDY ON CALIBRATION OF SPECTRAL PYRANOMETER

提出了一种比较简便的分光总日射表的校准方法。只要知道总日射表的正常灵敏度以及无色光学玻璃（ＷＧ２９５）滤光罩的滤光因子ＦＦ’和有色光学玻璃滤光罩的滤光因子ＦＦ＇ｘ，就可以通过修正因子Ａｘ＝ＦＦ’／ＦＦｘ进行修正。得出带相应有色光学玻璃滤光罩的总日射表的灵敏度。特别强调了ＦＦｘ＇为存在内罩情况下测得的外罩的滤光因子，而不是一般意义下的滤光片的滤光因子ＦＰｘ，二者在数值上是不等的。

simple calibration method of spectral pyranometers is described in this paper. Once the sensitivity of pyranometer. the filter factor FF' of clear spectral glass (WG 295)dome and the filter factor FF'x of color spectral glass dome are known. then the corresponding sensitivity of pyranometer with color spectral filter dome can be obtained by multiplying a modification factox Ax It is emphasized that the filter factor FF'x of the external dome but not the general filter factor FFx is measured when an internal dome exists. These two factors are not equal.