Detailed Structure of Electron Temperature and Density inside the Sporadic E Layer

Material type: 規格・テクニカルリポート類

Author: 坂本, 優美花ほか

Publisher: 宇宙航空研究開発機構(JAXA)

Publication date: 2018-10-25

Material Format: Digital

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Note (General)：: 出版タイプ： NAUnusual current-voltage characteristics were found by the Fast Langmuir Probe measurement inside sporadic E (Es) layer during S-520-29 soundi...

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Material Type: 規格・テクニカルリポート類
Title: Detailed Structure of Electron Temperature and Density inside the Sporadic E Layer
Author/Editor: 坂本, 優美花
阿部, 琢美
三宅, 亙
Sakamoto, Yumika
Abe, Takumi
Miyake, Wataru
Author Heading: Sakamoto, Yumika
Abe, Takumi
Miyake, Wataru
Publication, Distribution, etc.: 宇宙航空研究開発機構(JAXA)
Publication Date: 2018-10-25
Publication Date (W3CDTF): 2018
Periodical title: 宇宙航空研究開発機構研究開発報告 = JAXA Research and Development Report
No. or year of volume/issue: JAXA-RR-18-002E
Volume: JAXA-RR-18-002E
Pages: 1-9
ISSN (Periodical Title): ISSN : 2433-2216
Subject Heading: Ionosphere
Sporadic E layer
Electron density
Electron temperature
Sounding rocket
Energy budget
Target Audience: 一般
Note (General): 出版タイプ： NA
Unusual current-voltage characteristics were found by the Fast Langmuir Probe measurement inside sporadic E (Es) layer during S-520-29 sounding rocket flight. The characteristics are caused by a significant gradient of electron density inside the Es layer. We employ a new analysis method for accurate estimation of the electron temperature and density. It also allows us to obtain the temperature and density in a shorter time interval than the voltage sweep period. Our new observation and analysis method provide us with first detailed structure of electron density and temperature inside the Es layer with an unprecedented spatial resolution. The maximum electron density and the minimum electron temperature observed inside Es layer are estimated to be 9.7×10(exp 5) cm-3 and 550 K, respectively, at an altitude of 98 km. The total thickness of the layer is about 1 km. Furthermore, the detailed trend of the electron temperature from its boundary toward the center of Es layer was revealed so clearly owing to the new method. Electron temperature in the surrounding region of the Es layer is found to be quite high, suggesting significant heating at the altitude range. The observed reduction of electron temperature in the Es layer embedded in an elevated temperature region is interpreted in terms of dependence of heat sources and cooling processes on the thermal electron density.
形態: 図版あり
Physical characteristics: Original contains illustrations
資料番号: AA1830006000
レポート番号: JAXA-RR-18-002E
DOI: 10.20637/JAXA-RR-18-002E/0001
https://doi.org/10.20637/JAXA-RR-18-002E/0001
Data Provider (Database): 国立情報学研究所 : 学術機関リポジトリデータベース（IRDB）（機関リポジトリ）
https://irdb.nii.ac.jp
Original Data Provider (Database): 宇宙航空研究開発機構 : 宇宙航空研究開発機構リポジトリ