Densities and temperatures in the Venus mesosphere and lower thermosphere retrieved from SOIR on board Venus Express: Retrieval technique
Densities and temperatures in the Venus mesosphere and lower thermosphere retrieved from SOIR on board Venus Express: Retrieval technique
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从金星快车上的 SOIR 检索到金星中层和低层热层的密度和温度：检索技术
DOI：
10.1029/2010je003589
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发表时间：
2010
影响因子：
--
通讯作者：
J. Bertaux
中科院分区：
文献类型：
--
作者：
A. Mahieux;A. Vandaele;E. Neefs;S. Robert;V. Wilquet;R. Drummond;A. Federova;J. Bertaux
SOIR 仪器安装在金星快车上，在红外光谱范围内运行，并使用太阳掩星技术来确定金星大气中几个关键成分的垂直剖面。该反演算法基于最优估计方法，对属于一个掩星序列的所有光谱同时求解问题。 H2O、CO、HCl 和 HF 及其一些同位素体的垂直剖面通常在 70 至 120 公里的高度范围内获得，具体取决于物种和记录的光谱区域。对于 CO2，通过组合不同的光谱间隔可以获得 70 至 150 km 的垂直剖面。旋转温度也可以直接从光谱中的 CO2 特征中检索。本文描述了用于推导上述大气量和温度剖面的方法。该方法应用于一些检索案例，说明了该技术的能力。更多结果示例将在下面的配套论文中介绍和讨论，该论文将重点关注整个数据集的二氧化碳垂直剖面。
The SOIR instrument, flying on board Venus Express, operates in the infrared spectral domain and uses the solar occultation technique to determine the vertical profiles of several key constituents of the Venus atmosphere. The retrieval algorithm is based on the optimal estimation method, and solves the problem simultaneously on all spectra belonging to one occultation sequence. Vertical profiles of H2O, CO, HCl, and HF, as well as some of their isotopologues, are routinely obtained for altitudes ranging typically from 70 to 120 km, depending on the species and the spectral region recorded. In the case of CO2, a vertical profile from 70 up to 150 km can be obtained by combining different spectral intervals. Rotational temperature is also retrieved directly from the CO2 signature in the spectra. The present paper describes the method used to derive the above mentioned atmospheric quantities and temperature profiles. The method is applied on some retrieval cases illustrating the capabilities of the technique. More examples of results will be presented and discussed in a following companion paper which will focus on the CO2 vertical profiles of the whole data set.