本文给出了用太阳光作光源，用二极管阵列做探测器，通过分析太阳光谱测量大气中NO2浓度的方法。通过对观测数据的分析，得到合肥市西郊地区上空大气中NO2的含量大约为(1～4)×1016分子/cm2，结果与其他测量仪器所得的数据一致。
The method for extracting NO2 concentration from the data obtained by measurement of Sun spectra was given in this paper. The NO2 concentration about (1～4)×1016 molecule/cm2 in the atmosphere at suburb of Hefei city was obtained in agreement with that measured by other instrument.
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