This article discusses the resolution of an optical lidar for measuring the background concentration of methane in the Earth’s atmosphere. Using simulation and experimental studies, it has been shown that a resolution the width of the absorption line of which is ~0.006 nm and that has a concentration of methane of ~6% of the background can be obtained with a signal-to-noise ratio for received signals of ~200. When extrapolating the results to orbital measurements, the horizontal resolution will be ~8 km and the vertical resolution will be ~1.5 km. A broadening of the emission line of the lidar transmitter by a factor of 2–3 does not significantly reduce the resolution of the lidar, which makes it possible to increase the radiated power at the considered wavelength of ~1653 nm and improve the energy potential of the device as a whole.
Modeling and Experimental Study of Lidar Resolution to Determine Methane Concentration in the Earth’s Atmosphere
Cosmic Res
Cosmic Research ; 58 , 5 ; 330-337
2020-09-01
8 pages
Article (Journal)
Electronic Resource
English
Lidar reveals critical changes in Earth's atmosphere
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