Delayed response of the ionosphere to solar EUV variability
Delayed response of the ionosphere to solar EUV variability
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DOI：
10.5194/ars-16-149-2018
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发表时间：
2018-09
影响因子：
0.4
通讯作者：
Erik Schmölter;J. Berdermann;N. Jakowski;C. Jacobi;Rajesh Vaishnav
中科院分区：
文献类型：
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作者：
Erik Schmölter;J. Berdermann;N. Jakowski;C. Jacobi;Rajesh Vaishnav
抽象的。电离层中的物理和化学过程是由与太阳辐射的复杂相互作用驱动的。电离层等离子体对太阳极紫外光和紫外光变化特别敏感，时间延迟在一到两天之间。这种延迟被认为与从低电离层到F区的热层输送过程有关。在之前的分析中，使用F10.7指数对延迟进行了调查。在这里，我们介绍了基于一个全面和可靠的数据库的电离层延迟的初步结果，该数据库由GNSS、TEC地图和EUV光谱通量数据组成。我们计划具体说明地理/地磁位置、海拔、季节、当地时间、地球物理和太阳辐射条件(如太阳活动水平)的各种依赖关系。本文给出了极紫外光的季节相关性和波长区相关性的初步结果。这些结果可以更深入地了解电离层过程，对于依赖可靠的电离层天气预报的应用是有意义的，例如全球导航卫星系统误差分析、预测和缓解。
Abstract. Physical and chemical processes in the ionosphere are driven by complex interactions with the solar radiation. The ionospheric plasma is in particular sensitive to solar EUV and UV variations with a time delay between one and two days. This delay is assumed to be related to thermospheric transport processes from the lower ionosphere to the F region. In previous analyses, the delay has been investigated using the F10.7 index. Here we present preliminary results of the ionospheric delay based on a comprehensive and reliable database consisting of GNSS TEC Maps and EUV spectral flux data. We plan to specify the various dependencies from geographic/geomagnetic location, altitude, season, local time, geophysical and solar radiation conditions such as the solar activity level. The first results for dependencies from seasons and wavelengths regions of the EUV are presented in this paper. These results can provide more insight into ionospheric processes and are of interest for applications dependent on reliable ionospheric weather forecasts, e.g. GNSS error analyses, prediction and mitigation.