title: [Improving the temperature robustness of the DOAS based on two-dimensional correlation spectroscopy technology].
abstract: The accuracy of the measurement results will be influenced by the ambient temperature in the real-time monitoring based on Differential Optical Absorption Spectroscopy (DOAS). A novel method to improve the temperature robustness of DOAS technology is adopted by two-dimensional correlation spectroscopy technology. Two-dimensional correlation is used to analyse the SO2 absorption cross section at different temperatures. The diagonal slices of synchronization correlation spectroscopy which come from dynamic absorption cross section are obtained. The wavelength 300.5-310 nm is used as the preferred inversion wavelength range based on the slices. The field measurement results and reference value are compared. Results show that the 24-hour average measurement error is 22.5% at 290-310 nm and that at 300.5-310 nm is 9.9%. The correlation coefficients are 0.9496 and 0.7808, respectively. Two-dimensional correlation DOAS technology can be applied to enhance the robustness of temperature, and to improve the accuracy of the measurement results.
authors.affiliation: State Key Lab of Precision Measuring Technology and Instruments, Tianjin University, Tianjin 300072, China. lhl79@tju.edu.cn
authors.forename: Hong-lian
authors.initials: HL
authors.lastname: Li
authors.affiliation: School of Mechanical Engineering, Hebei University of Technology, Tianjin 300130, China.
authors.forename: Yong-jie
authors.initials: YJ
authors.lastname: Wei
authors.affiliation: State Key Lab of Precision Measuring Technology and Instruments, Tianjin University, Tianjin 300072, China.
authors.forename: Chuan-ming
authors.initials: CM
authors.lastname: Lü
authors.affiliation: State Key Lab of Precision Measuring Technology and Instruments, Tianjin University, Tianjin 300072, China.
authors.forename: Wen-liang
authors.initials: WL
authors.lastname: Chen