| 光谱学与光谱分析 |
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| Obtaining Aerosol Backscattering Coefficient Using Pure Rotational Raman-Mie Scattering Spectrum |
| RONG Wei1, 2, CHEN Si-ying1, 2*, ZHANG Yin-chao1, 2, CHEN He1, 2, GUO Pan1, 2 |
1. School of Optoelectronics, Beijing Institute of Technology, Beijing 100081, China
2. Key Laboratory of Photoelectronic Imaging Technology and System (Beijing Institute of Technology), Ministry of Education, Beijing 100081, China |
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Abstract Both the traditional Klett and Fernald methods used to obtain atmospheric aerosol backscattering coefficient require the hypothesis of relationship between the extinction coefficient and backscattering coefficient, and this will bring error. According to the theory that the pure rotational Raman backscattering coefficient is only related to atmospheric temperature and pressure, a new method is presented for inverting aerosol backscattering coefficient, which needed the intensity of elastic scattering and rotational Raman combined with atmospheric temperature and pressure obtained with the sounding balloons in this article. This method can not only eliminate the errors of the traditional Klett and Fernald methods caused by the hypothesis, but also avoid the error caused by the correction of the overlap. Finally, the aerosol backscattering coefficient was acquired by using this method and the data obtained via the Raman-Mie scattering Lidar of our lab. And the result was compared with that of Klett and Fernald.
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Received: 2012-05-17
Accepted: 2012-08-15
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Corresponding Authors:
CHEN Si-ying
E-mail: csy@bit.edu.cn
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