Measurement And Application Of Solar Radiation Spectra

Optical method has high sensitivity and speed, enabling real-time monitoring features, and does not create any new pollution, is the ideal method for detection of atmospheric pollutants. In this paper, the status of atmospheric optics, based on the iHR320 imaging spectrometer at the core of a spectral measurement system constructed the northern outskirts of Nanjing, the sun, the sky light to the spectral measurements, and the measured spectra a more detailed analysis of the data. According to the analysis of the spectral information, the peak wavelength of the solar spectrum moves from morning to night regularly during the day, and the intensities of sky spectrum are increased in the shortwave part in relative to the direction of the solar spectrum. In addition, the paper also compares the sky spectral measurements in different weather conditions, and makes the corresponding qualitative analysis basing on light scattering theory. Finally, taking sunlight as the light source, collecting the solar spectrum, selecting a time of the solar spectrum as a reference spectrum, any other moment of NO2 concentration was estimated by the concentration of pollutant gas data and the applications of different absorption principle. In this paper, drawing on spectral analysis software Origin7.5 and HITRAN database, absorption cross section spectra is drawn. The absorption coefficient of arbitrary wavelength is successfully obtained. A quantitative analysis of spectral lines is achieved, which reveals the relationship between the solar radiation spectrum and atmospheric pollutants. The distortion is low, inversion parameters are highly accurate. To some extent the accuracy of gas concentration is improved. Measurement results are consistent with other devices, confirming the feasibility of the method.