Abstract

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.

中文翻译：

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激光雷达分辨率确定地球大气中甲烷浓度的模型与实验研究

摘要

本文讨论了用于测量地球大气中甲烷背景浓度的光学激光雷达的分辨率。使用模拟和实验研究表明，可以以信噪比获得分辨率为吸收线宽度为〜0.006 nm，甲烷浓度为背景浓度6％的分辨率。接收的信号约为200。将结果外推到轨道测量时，水平分辨率为〜8 km，垂直分辨率为〜1.5 km。将激光雷达发射器的发射线加宽2–3倍不会显着降低激光雷达的分辨率，这使得可以在所考虑的〜1653 nm波长处增加辐射功率并提高激光的能量潜能。整个设备。