用多频测距法测定电离层电子密度剖面

IF 1.8 4区 地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY
D. McKay, J. Vierinen, A. Kero, N. Partamies
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引用次数: 1

摘要

摘要电离层中的无线电波吸收是电子密度、碰撞频率、无线电波极化、磁场和无线电波频率的函数。一些研究已经使用宇宙无线电噪声吸收的多频率测量来确定电子密度分布。使用统计反问题的框架,我们研究了是否可以通过使用多频率、双极化测量来确定电子密度高度分布。研究发现,通过对所有频率和两种偏振模式的无线电波吸收的完整测量,不能唯一地确定海拔剖面。这意味着,仅使用多频测距仪数据无法确定精确的电子密度分布测量,但重建需要对电子密度分布进行强有力的额外先验假设,例如电离源的参数化模型。然而,吸收的光谱指数可以用来确定是否存在使D区下部电离的硬降水的重要成分,但仅凭这项技术不可能唯一地推断海拔分布。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
On the determination of ionospheric electron density profiles using multi-frequency riometry
Abstract. Radio wave absorption in the ionosphere is a function of electron density, collision frequency, radio wave polarisation, magnetic field and radio wave frequency. Several studies have used multi-frequency measurements of cosmic radio noise absorption to determine electron density profiles. Using the framework of statistical inverse problems, we investigated if an electron density altitude profile can be determined by using multi-frequency, dual-polarisation measurements. It was found that the altitude profile cannot be uniquely determined from a complete measurement of radio wave absorption for all frequencies and two polarisation modes. This implies that accurate electron density profile measurements cannot be ascertained using multi-frequency riometer data alone, but that the reconstruction requires a strong additional a priori assumption of the electron density profile, such as a parameterised model for the ionisation source. Nevertheless, the spectral index of the absorption could be used to determine if there is a significant component of hard precipitation that ionises the lower part of the D region, but it is not possible to infer the altitude distribution uniquely with this technique alone.
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来源期刊
Geoscientific Instrumentation Methods and Data Systems
Geoscientific Instrumentation Methods and Data Systems GEOSCIENCES, MULTIDISCIPLINARYMETEOROLOGY-METEOROLOGY & ATMOSPHERIC SCIENCES
CiteScore
3.70
自引率
0.00%
发文量
23
审稿时长
37 weeks
期刊介绍: Geoscientific Instrumentation, Methods and Data Systems (GI) is an open-access interdisciplinary electronic journal for swift publication of original articles and short communications in the area of geoscientific instruments. It covers three main areas: (i) atmospheric and geospace sciences, (ii) earth science, and (iii) ocean science. A unique feature of the journal is the emphasis on synergy between science and technology that facilitates advances in GI. These advances include but are not limited to the following: concepts, design, and description of instrumentation and data systems; retrieval techniques of scientific products from measurements; calibration and data quality assessment; uncertainty in measurements; newly developed and planned research platforms and community instrumentation capabilities; major national and international field campaigns and observational research programs; new observational strategies to address societal needs in areas such as monitoring climate change and preventing natural disasters; networking of instruments for enhancing high temporal and spatial resolution of observations. GI has an innovative two-stage publication process involving the scientific discussion forum Geoscientific Instrumentation, Methods and Data Systems Discussions (GID), which has been designed to do the following: foster scientific discussion; maximize the effectiveness and transparency of scientific quality assurance; enable rapid publication; make scientific publications freely accessible.
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