Abstract
We present a new differential absorption lidar (DIAL) method for atmospheric trace SO2 using multiwavelength curve fitting. With this method we use five wavelengths around a SO2 absorption peak and obtain SO2 and O3 concentrations by fitting their absorption cross sections to measured DIAL and null results. A SO2 concentration of 6 parts in 109 (ppb) was obtained for an altitude of 1050 m with 150-m range resolution. In addition, we optimized the wavelengths for dual-DIAL SO2 measurement and demonstrated a high sensitivity of <0.5 ppb with 300-m range resolution. Comparison of these two methods is also presented.
© 2002 Optical Society of America
Full Article | PDF ArticleMore Like This
Takashi Fujii, Tetsuo Fukuchi, Naohiko Goto, Koshichi Nemoto, and Nobuo Takeuchi
Appl. Opt. 40(6) 949-956 (2001)
Takuya Nayuki, Tetsuo Fukuchi, Nianwen Cao, Hideto Mori, Takashi Fujii, Koshichi Nemoto, and Nobuo Takeuchi
Appl. Opt. 41(18) 3659-3664 (2002)
Zhien Wang, Hideaki Nakane, Huanling Hu, and Jun Zhou
Appl. Opt. 36(6) 1245-1252 (1997)