Spectroscopy and Spectral Analysis, Volume. 34, Issue 3, 609(2014)
Spectral Scanning Measurement of High-Precision Solar Irradiance-Meter
In order to measure the radiation of the sun absolutely and retrieve the characterization of the atmosphere precisely, a high-precision solar spectral irradiance meter working in 04~10 μm band was developed. A Fèry prism was employed to disperse the incident sunlight and a closed-loop control method was adopted for spectral scanning in this solar irradiance meter. The design of spectral scanning measurement was depicted in detail. The design requirements of Fèry prism were given and spectral dispersion was achieved by single element. The trap detectors were used to ensure precise spectral measurement. According to the parameters of the trap detectors, the demands and method of temperature control were introduced. The design of spectral scanning structure was introduced, and wavelengths were positioned accurately. The requirements for parameters, stability and power supply of voice coil actuator were given and the wavelength position error of 0025% was achieved. Spectral scanning measurement of 04~10 μm was accomplished in outdoor experiments. A comparison was carried out with visible-short wave infrared spectrometer and auto-sunphotometer(CE318). Results indicate that absorption peak locations of spectral scanning measurement of irradiance meter are correct, and the relative deviation from CE318 measurements is less than 013% for all day, and the relative deviation of optical depth in visible and near infrared band is less than 2% and 5%, respectively.
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LIU En-chao, LI Xin, ZHANG Yan-na, LI Wen-wei, ZHENG Xiao-bing. Spectral Scanning Measurement of High-Precision Solar Irradiance-Meter[J]. Spectroscopy and Spectral Analysis, 2014, 34(3): 609
Received: Apr. 19, 2013
Accepted: --
Published Online: Mar. 14, 2014
The Author Email: En-chao LIU (liuech@aiofm.ac.cn)