22 June 2017 Research on atmospheric CO2 remote sensing with open-path tunable diode laser absorption spectroscopy and comparison methods
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Abstract
An open-path atmospheric CO 2 measurement system was built based on tunable diode laser absorption spectroscopy (TDLAS). The CO 2 absorption line near 2    μ m was selected, measuring the atmospheric CO 2 with direct absorption spectroscopy and carrying on the comparative experiment with multipoint measuring instruments of the open-path. The detection limit of the TDLAS system is 1.94 × 10 6 . The calibration experiment of three AZ-7752 handheld CO 2 measuring instruments was carried out with the Los Gatos Research gas analyzer. The consistency of the results was good, and the handheld instrument could be used in the TDLAS system after numerical calibration. With the contrast of three AZ-7752 and their averages, the correlation coefficients are 0.8828, 0.9004, 0.9079, and 0.9393 respectively, which shows that the open-path TDLAS has the best correlation with the average of three AZ-7752 and measures the concentration of atmospheric CO 2 accurately. Multipoint measurement provides a convenient comparative method for open-path TDLAS.
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)
Fengxin Xin, Fengxin Xin, Jinjia Guo, Jinjia Guo, Jiayun Sun, Jiayun Sun, Jie Li, Jie Li, Chaofang Zhao, Chaofang Zhao, Zhishen Liu, Zhishen Liu, } "Research on atmospheric CO2 remote sensing with open-path tunable diode laser absorption spectroscopy and comparison methods," Optical Engineering 56(6), 066113 (22 June 2017). https://doi.org/10.1117/1.OE.56.6.066113 . Submission: Received: 7 March 2017; Accepted: 31 May 2017
Received: 7 March 2017; Accepted: 31 May 2017; Published: 22 June 2017
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