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首页> 外文期刊>Geophysical Research Letters >Characterization of particles from stratospheric launch vehicle plumes using wavelength-dependent lidar techniques
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Characterization of particles from stratospheric launch vehicle plumes using wavelength-dependent lidar techniques

机译：使用与波长有关的激光雷达技术表征平流层运载火箭羽流中的颗粒

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摘要

Our Mobile Lidar Trailer (MLT) has been deployed to Cape Canaveral Air Station for the purpose of studying the characteristics of launch vehicle plumes in the stratosphere. In addition to measurements of plume extent and dispersion rates, information on particle species and size can be obtained from the wavelength dependence of the Mie return signal. We measure the backscattering ratio of Mie to Rayleigh return at several wavelengths and compare the results to a model of Mie scattering cross sections for homogeneous spheres of specific refraction index and radius. Of primary interest are the calculations for particles which are present in the exhaust of solid rocket motors (SRM) and are conjectured to be instrumental in the catalysis of halogenic destruction of stratospheric ozone. Our data indicate that these particles, at least within the first half-hour after launch, are small (r < 50 nm as an upper limit). The data also shows a trend of the mean particle radius increasing with time.
机译：我们的移动激光雷达拖车（MLT）已部署到卡纳维拉尔角航空站，目的是研究平流层中运载火箭羽流的特征。除了测量羽化程度和弥散速率外，还可以从Mie返回信号的波长依赖性中获得有关粒子种类和大小的信息。我们测量了几种波长下Mie与Rayleigh反射的背向散射比，并将结果与​​特定折射率和半径的均质球体的Mie散射截面模型进行了比较。首先要关注的是固体火箭发动机（SRM）排气中存在的颗粒的计算，这些计算被认为有助于催化平流层臭氧的卤素破坏。我们的数据表明，这些粒子至少在发射后的前半小时内很小（r <50 nm作为上限）。数据还显示平均颗粒半径随时间增加的趋势。

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