Variability of the Martian ionosphere from the MAVEN Radio Occultation Science Experiment
文献类型：期刊论文
| 作者 | Yao Meijuan1; Cui Jun1; Wu Xiaoshu2 ; Huang Yingying1; Wang Wenrui1
|
| 刊名 | Earth and Planetary Physics
 |
| 出版日期 | 2019 |
| 卷号 | 3期号:4页码:283 |
| 关键词 | Mars planetary ionospheres radio occultation |
| ISSN号 | 2096-3955 |
| 英文摘要 | The Martian ionosphere is produced by a number of controlling processes, including solar extreme ultraviolet radiation (EUV) and X-ray ionization, impact ionization by precipitating electrons, and day-to-night transport. This study investigates the structural variability of the Martian ionosphere with the aid of the radio occultation (RO) experiments made on board the recent Mars Atmosphere and Volatile Evolution (MAVEN) spacecraft. On the dayside, the RO electron density profiles are described by the superposition of two Chapman models, representing the contributions from both the primary layer and the low-altitude secondary layer. The inferred subsolar peak electron densities and altitudes are 1.24×10~5 cm-3 and 127 km for the former, and 4.28×10~4 cm-3 and 97 km for the latter, respectively, in general agreement with previous results appropriate for the low solar activity conditions. Our results strengthen the role of solar EUV and X-ray ionization as the driving source of plasma on the dayside of Mars. Beyond the terminator, a systematic decline in ionospheric total electron content is revealed by the MAVEN RO measurements made from the terminator crossing up to a solar zenith angle of 120°. Such a trend is indicative of day-to-night plasma transport as an important source for the nightside Martian ionosphere. |
| 语种 | 英语 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/60075]  |
| 专题 | 中国科学院国家天文台 |
| 作者单位 | 1.中山大学 2.中国科学院国家天文台 |
| 推荐引用方式 GB/T 7714 | Yao Meijuan,Cui Jun,Wu Xiaoshu,et al. Variability of the Martian ionosphere from the MAVEN Radio Occultation Science Experiment[J]. Earth and Planetary Physics,2019,3(4):283. |
| APA | Yao Meijuan,Cui Jun,Wu Xiaoshu,Huang Yingying,&Wang Wenrui.(2019).Variability of the Martian ionosphere from the MAVEN Radio Occultation Science Experiment.Earth and Planetary Physics,3(4),283. |
| MLA | Yao Meijuan,et al."Variability of the Martian ionosphere from the MAVEN Radio Occultation Science Experiment".Earth and Planetary Physics 3.4(2019):283. |
入库方式： OAI收割
来源：国家天文台
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