Abstract

Subject of study. Methane concentration in near-the-surface tropospheric sensing paths was investigated under background conditions using a mobile differential absorption lidar. Aim of study. A mobile differential absorption lidar for remote sensing of atmospheric methane in the mid-infrared spectral range was designed, calibrated, and tested in natural field experiments. Method. The designed lidar enables investigation in the atmosphere using the differential absorption method. This method is based on the effect of resonant absorption of laser emission by gases. The emission source of the lidar has two operating wavelengths, one (on-line) in the center of the methane absorption line and the other (off-line) on the wing of the absorption line. The lidar signals obtained at on- and off-line wavelengths enable retrieval of the methane concentration under background conditions. Main results. The designed mobile IR differential absorption lidar for investigation of atmospheric methane is described. The mobile IR emission source of the differential absorption lidar was calibrated in the informative range of methane sensing near 3400 nm. The results of a natural field test of the mobile IR lidar for detection of atmospheric response at the calibrated sensing wavelengths and retrieval of methane background concentrations of approximately 2.0 ppm in horizontal surface atmospheric sensing paths are presented. Practical significance. The technical solutions for the design of the mobile lidar for remote methane sensing proposed in this paper enable formulation of the requirements on its further improvement aiming to increase the measurement range, design a vertical configuration for remote sensing from an aircraft, and use it at arctic latitudes.

© 2022 Optica Publishing Group

Polarization Raman lidar for atmospheric correction during remote sensing satellite calibration: instrument and test measurements

Song Mao, Anzhou Wang, Yang Yi, Zhenping Yin, Yiming Zhao, Xiuqing Hu, and Xuan Wang
Opt. Express 30(7) 11986-12007 (2022)

Mobile remote sensing system for atmospheric monitoring

Hans Edner, Kent Fredriksson, Anders Sunesson, Sune Svanberg, Leif Unéus, and Wilhelm Wendt
Appl. Opt. 26(19) 4330-4338 (1987)

Laser remote sensing of atmospheric ammonia using a CO₂ lidar system

Alan P. Force, Dennis K. Killinger, William E. DeFeo, and Norman Menyuk
Appl. Opt. 24(17) 2837-2841 (1985)

Performance assessment of a coherent DIAL-Doppler fiber lidar at 1645 nm for remote sensing of methane and wind

Nicolas Cezard, Simon Le Mehaute, Julien Le Gouët, Matthieu Valla, Didier Goular, Didier Fleury, Christophe Planchat, and Agnes Dolfi-Bouteyre
Opt. Express 28(15) 22345-22357 (2020)

Broadband continuous-wave differential absorption lidar for atmospheric remote sensing of water vapor

Jiheng Yu, Yuan Cheng, Zheng Kong, Jiaming Song, Yupeng Chang, Kun Liu, Zhenfeng Gong, and Liang Mei
Opt. Express 32(3) 3046-3061 (2024)