DARTS at ISAS/JAXA

Akebono Radiation Detection Monitor (RDM) data

Overview

Description

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.”

Keywords

AKEBONO 📓📅EXOS-D 📓📅Radiation Detection Monitor (RDM) 📓📅SpacePlasmaPhysics 📓📅Geospace 📓📅Aurora 📓📅Radiation 📓📅

Version

N/A

Publication Date

2014

Temporal Coverage

from 2012-10-01 to 2015-04-21

Identifier

Title: Akebono Radiation Detection Monitor (RDM) data
ID: darts:akebono-rdm-data
URL: https://darts.isas.jaxa.jp/datasets/darts:akebono-rdm-data

Data Distribution

https://data.darts.isas.jaxa.jp/pub/akebono/rdm/ (text/plain, image/gif)

https://darts.isas.jaxa.jp/app/stp/akebono/RDM.html (image/gif)

Data Structure (auto-generated summary)

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

Creator

ISAS > Institute of Space and Astronautical Science (宇宙科学研究所) [ROR: 034gcgw60]

Copyright Holder

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]

License

https://www.isas.jaxa.jp/en/researchers/data-policy/

References

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

Relations

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