Trace atmospheric SO2 measurement by multiwavelength curve-fitting and wavelength-optimized dual differential absorption lidar

被引：12
|
作者：
Fujii, T
Fukuchi, T
Cao, NW
Nemoto, K
Takeuchi, N
机构：
[1] Cent Res Inst Elect Power Ind, Dept Phys Elect, Komae Res Lab, Komae, Tokyo 2018511, Japan
[2] Chiba Univ, Ctr Environm Remote Sensing, Inage Ku, Chiba 2638522, Japan
来源：
APPLIED OPTICS | 2002年 / 41卷 / 03期
关键词：
D O I：
10.1364/AO.41.000524
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We present a new differential absorption lidar (DIAL) method for atmospheric trace SO2 using multi-wavelength curve fitting. With this method we use five wavelengths around a SO2 absorption peak and obtain SO2 and O-3. concentrations by fitting their absorption cross sections to measured DIAL and null results. A SO2 concentration of 6 parts in 10(9) (ppb) was obtained for an altitude of 1050 m with 150-m range resolution. In addition, we optimized the wavelengths fur dual-DLAL SO2 measurement and demonstrated a high sensitivity of <0.5 ppb with 300-m range resolution. Comparison of these two methods is also presented. (C) 2002 Optical Society of America.
引用
收藏
页码：524 / 531
页数：8
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