用于平流层和对流层风场探测的高分辨率氧修正激光外差辐射计（LHR）。

High-resolution oxygen-corrected laser heterodyne radiometer (LHR) for stratospheric and tropospheric wind field detection.

出版信息

Opt Express. 2023 Feb 27;31(5):7850-7862. doi: 10.1364/OE.483123.

Abstract

We developed a near-infrared (NIR) dual-channel oxygen-corrected laser heterodyne radiometer (LHR) in the ground-based solar occultation mode for measuring vertical profile of wind field in the troposphere and low stratosphere. Two distributed feedback (DFB) lasers centered at 1.27 µm and 1.603 µm were used as local oscillators (LO) to probe absorption of oxygen (O) and carbon dioxide (CO), respectively. High-resolution atmospheric O and CO transmission spectra were measured simultaneously. The atmospheric O transmission spectrum was used to correct the temperature and pressure profiles based on a constrained Nelder-Mead's simplex method. Vertical profiles of atmospheric wind field with an accuracy of ∼5 m/s were retrieved based on the optimal estimation method (OEM). The results reveal that the dual-channel oxygen-corrected LHR has high development potential in portable and miniaturized wind field measurement.

摘要

我们开发了一种基于地基日冕法的近红外（NIR）双通道氧修正激光外差辐射计（LHR），用于测量对流层和低平流层中风场的垂直廓线。两个中心波长分别为 1.27 μm 和 1.603 μm 的分布式反馈（DFB）激光器分别作为本振（LO）来探测氧气（O）和二氧化碳（CO）的吸收。同时测量了高分辨率的大气 O 和 CO 传输光谱。利用约束单纯形法（Constrained Nelder-Mead's simplex method）基于大气 O 传输光谱对温度和压力廓线进行修正。基于最优估计法（OEM）反演出风速垂直廓线，精度约为 5 m/s。结果表明，双通道氧修正 LHR 在便携式和小型化风场测量方面具有很高的发展潜力。