あけぼの 放射線モニター（RDM）データ
概要
説明
The Radiation Detection Monitor (RDM) onboard Akebono has been observing electron fluxes in three energy ranges (0.3-0.95, 0.95-2.5, >2.5 MeV). RDM is not designed to be a scientific instrument so that its capability is very limited. The sensor view is perpendicular to the Sun-pointing spin axis, and the spin period is 8 s. The sensor has a wide view angle. Although basic time resolution for particle measurements is 0.5 s, 16 s averaged data have enough counts to be statistically meaningful. Isotropic flux distributions should be assumed, and no pitch angle information is available.
The observations are summarized in Takagi et al., 1993 and Nagai 2012.
The data from the >2.5 MeV electron channel are open to the public since noise levels become high in the 0.3-0.95 and 0.95-2.5 MeV electron channels.
Data Format
| Column No. | Name | Unit | Format | |
|---|---|---|---|---|
| 1 | Date | YYYYMMDD | i8 | date of observation |
| 2 | Time | HHMMSS (UT) | 1x,i6 | start time of each 16-s period |
| 3 | L | f7.2 | L value with the model geomagnetic field with the IGRF 2005 | |
| 4 | INV | deg. | f6.2 | invariant latitude |
| 5 | FMLAT | deg. | f7.2 | magnetic latitude of the S/C footpoint |
| 6 | MLAT | deg. | f7.2 | magnetic latitude |
| 7 | MLT | hours | f6.2 | magnetic local time |
| 8 | ALT | km | f9.2 | altitude |
| 9 | GLAT | deg. | f7.2 | geographic latitude |
| 10 | GLON | deg. | f7.2 | geographic longitude |
| 11 | FEIO | 1/(cm2 s sr) | e11.3 | electron integral energy flux (> 2.5MeV) |
Data Analysis
Here, you can find a TDAS load procedure file for RDM data.
RDM data analysis becomes available on TDAS with this load procedure. TDAS (THEMIS Data Analysis Software suite) has been developed by THEMIS project. See TDAS web page for details.
If you have any questions or request for the data, please contact DARTS.
Request for using this data
In any publications, the use of the Akebono data should be acknowledged, for example,
“Akebono/RDM data were provided through DARTS at the Institute of Space and Astronautical Science, JAXA in Japan.”
キーワード
バージョン
N/A
公開日
2014
時間範囲
from 2012-10-01 to 2015-04-21
識別子
- タイトル: あけぼの 放射線モニター（RDM）データ
- ID: darts:akebono-rdm-data
- URL: https://darts.isas.jaxa.jp/datasets/darts:akebono-rdm-data
データ配布
https://data.darts.isas.jaxa.jp/pub/akebono/rdm/ (text/plain, image/gif)
データ構造 (自動生成されたサマリー)
pub/akebono/rdm/
├── 2012/
├── 2013/
├── 2014/
├── 2015/
│ └── sf{YYMMDD}
└── plot/
├── m1{YYMM}.gif, m1_latest.gif
├── monflux{YYMM}.gif
├── rdmflux{YYYY}.gif, rdmflux_latest.gif
└── rdmmap{YYYY}.gif, rdmmap_latest.gif
作成者
- ISAS > Institute of Space and Astronautical Science (宇宙科学研究所) [ROR: 034gcgw60]
著作権者
- JAXA > Japan Aerospace Exploration Agency (宇宙航空研究開発機構) [ROR: 059yhyy33]
- ISAS > Institute of Space and Astronautical Science (宇宙科学研究所) [ROR: 034gcgw60]
ライセンス
参考文献
- Oya, H. et al. (1990) Journal of Geomagnetism and Geoelectricity - Introduction to the Akebono (EXOS-D) satellite observations. https://doi.org/10.5636/jgg.42.367
- Nagai, T. (2012) Dynamics of the Earth's Radiation Belts and Inner Magnetosphere - Rebuilding Process of the Outer Electron Radiation Belt: The Spacecraft Akebono Observations https://doi.org/10.1029/2012GM001281
- Takagi, S. et al. (1993) IEEE Transactions on Nuclear Science - Observation of Space Radiation Environment with EXOS-D https://doi.org/10.1109/23.273513
- Readme https://www.stp.isas.jaxa.jp/akebono/readme/readme.rdm.txt