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首页> 外文会议>Conference on First Jet Propulsion Laboratory in Situ Instruments Workshop Jun 11-13, 2002 Pasadena, California, USA >Characterization of atmospheric aerosols by an in-situ photometric technique in planetary environments
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Characterization of atmospheric aerosols by an in-situ photometric technique in planetary environments

机译：在行星环境中通过原位光度技术表征大气气溶胶

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摘要

Propagation of solar ultraviolet (UV) radiation through the atmosphere of a planet is affected by the atmospheric composition. Therefore it indirectly influences the incidence of this harmful radiation on biological organisms. In Earth, the atmospheric parameters have been characterized by both direct measurements and indirect ground and space technologies. Among these parameters, the aerosols are the least known atmospheric constituents. In the case of Mars, there are two important aspects to be pointed out: the solar UV radiation reaching the surface is very high, and the amount of atmospheric aerosols is very large. Thus, the protective role of aerosols against the UV radiation in the Martian atmosphere is subject to be investigated. We propose to determine the characteristics of aerosols by using photometric techniques based on in-situ Earth-based experiments. Among these techniques, the Differential Optical Absorption Spectroscopy (DOAS) is considered one of the most suitable methods to determine the atmospheric aerosol optical thickness, which gives information about the aerosol atmospheric content and size distribution. The equipment to be developed is a photometric device, composed of a multi-sensor-channel array ranging in the visible (VIS) spectrum. The data thus obtained are inserted into an algorithm, which is developed also in this work, and the aerosol parameters are calculated.
机译：太阳紫外线（UV）在行星大气中的传播受大气成分的影响。因此，它间接影响这种有害辐射对生物的发生率。在地球上，大气参数已通过直接测量以及间接地面和空间技术来表征。在这些参数中，气溶胶是已知最少的大气成分。对于火星，有两个重要方面需要指出：到达表面的太阳紫外线辐射非常高，大气中的气溶胶数量非常大。因此，需要研究气溶胶对火星大气中紫外线辐射的保护作用。我们建议使用基于原位地球实验的光度技术来确定气溶胶的特性。在这些技术中，差分光学吸收光谱法（DOAS）被认为是确定大气气溶胶光学厚度的最合适方法之一，该方法可提供有关气溶胶大气含量和尺寸分布的信息。待开发的设备是一种光度测量设备，由可见光（VIS）光谱范围内的多传感器通道阵列组成。这样获得的数据被插入到算法中，该算法也在这项工作中得到发展，并计算了气溶胶参数。

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