Influence of Noise on Atmospheric Trace Gas Distribution Reconstruction

Journal of Atmospheric and Environmental Optics ›› 2017, Vol. 12 ›› Issue (5): 371-376.

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Influence of Noise on Atmospheric Trace Gas Distribution Reconstruction

WEI Minhong, LI Suwen, Zhu Xuan, DOU Dezhao, SHAO Fen

（School of Physics and Electronic Information, Huaibei Normal University, Huaibei 235000, China）

Received:2016-09-22 Revised:2016-11-04 Online:2017-09-28 Published:2017-09-21
About author:韦民红(1978－)，女，安徽淮北人，博士，副教授, 主要从事控制工程、光学检测技术方面的研究。
Supported by:
Supported by General Project of National Natural Science Foundation of China (国家自然科学基金面上项目, 41275027 ), Natural Science Research Foundation of Education Bureau of Anhui Province, China (安徽高校省级自然科学研究重点项目, KJ2015A069)

Abstract

Abstract:

For the noise problem of two-dimensional concentration distribution reconstruction of trace gases in the atmosphere, the method of numerical simulation is adopted to study the influence of noise on the spatial distribution reconstruction of atmospheric trace gases by the differential absorption spectrum tomography. The noise model is established, the algebraic iterative reconstruction algorithm (ART) and simultaneous iterative reconstruction algorithm (SIRT) are researched, and the influence of noise on the reconstruction effects of the two kinds of reconstruction algorithm is also researched respectively. The error index Ea can be reduced from 0.1080 to 0.0182 by reconstruction of ART algorithm, and the error index Ea can be reduced from 0.0476 to 0.0102 by reconstruction of SIRT algorithm. The results show that with the increase of random noise, the abnormal degree of reconstruction image is more and more serious. From the relative error indicators of reconstruction, with the increase of signal-to-noise ratio, reconstruction of relative error is smaller and smaller. Therefore, noise should try to be avoided in field reconstruction experiment.

Key words: noise, gas distribution, reconstruction

CLC Number:

O433.5

WEI Min-Gong, LI Su-Wen, ZHU Xuan, DOU De-Zhao, SHAO Fen. Influence of Noise on Atmospheric Trace Gas Distribution Reconstruction[J]. Journal of Atmospheric and Environmental Optics, 2017, 12(5): 371-376.

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