Van Allen Probes SWG 2014/09
Current status of

ERG Project Team

ERG
(M-class mission of ISAS/JAXA)
・ apogee geocentric distance ： 5.5 Re ・ perigee altitude: 300 km
・ inclination angle: 31 deg (Lmax ~ 9) ・ initial apogee MLT: 09:00
・ spin period: 8 sec
・ planned launch date: -2016
・ nominal mission life: > 1yr
・ Launch vehicle: Epsilon

Mission Status & Schedule
FY 2009 Mission Definition Review.
System Requirement Review.
FY 2011 System Definition Review
FY 2012 Preliminary Design Review
FY 2013 Critical Design Review
FY 2014-2015
Development of the flight model/integration test
2016 Launch of the satellite

The ERG ground networks
Ground Monitor of Fields / Waves
・ Radar Network: SuperDARN network
・ Magnetometer Network ： MAGDAS, 210MM, STEL, Antarctica Network
(Flux gate/search coil)
・ VLF wave Network ： Canada, Antarctica Network
Ground Monitor of plasma distributions and precipitations
・
Optical Imager Network
：
OMTIs (Canada, Norway, Siberia), Antarctica
・
Riometer Network
：
Canada, Antarctica
・
LF-standard radio waves
：
Canada, Norway

The ERG Science Center
ERG satellite data ERG ground data ERG modeling data
ERG
All science data are archived with CDF
IDL/SPEDAS is a project data analysis software.
Collaboration with THEMIS
SPEDAS has included the ERG-plugin tools.
(210MM magnetometer, SuperDARN radars etc) users
L-2/3 data will be opened to the public via ERG-science center.

Conjunction Event Finder
Web-based interactive tool to display the satellite orbits as well as the footprints.
Easy to find the conjunction between ground observations and satellites.
THEMIS
Van Allen Probes
Xgsm
Cluster
THEMIS
Van Allen Probes Geotail
Cluster
Xgsm

Conjunction Event Finder
Web-based interactive tool to display the satellite orbits as well as the footprints.
Easy to find the conjunction between ground observations and satellites.
Van Allen Probes Van Allen Probes
Northern Hemisphere Southern Hemisphere

Summary
The ERG project is now going; the satellite will be launched in 2016.
Data of the ERG ground network observations have been archived with CDF format and opened to the public. The software for the data analysis has been developed with THEMIS team.
SPEDAS has included several plug-in tools for ERG data
Conjunction event finder will be helpful for the coordinated observations between satellites and ground observations.

10

Launch : Feb 22 1989
Radiation monitor data in 2013
Projection to the magnetic meridional plane

12

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RDM : Radiation monitor

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RDM measures the electron flux in three energy ranges (0.3-0.95, 0.95-2.5,
>2.5 MeV)
Only the data of the energy >2.5MeV are open to the public.
VLF : Low-frequency plasma waves

MCA (multi-channel analyzer) data are open to the public.

E × 1 & B × 1, 16 channels each, <17.8kHz
PWS : High-frequency plasma waves
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Dynamic spectra are open to the public.

E × 1, 20kHz ~ 5MHz

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Summary Plots (From Oct/2012 to July/2014)
 http://ergsc.stelab.nagoya-u.ac.jp/cef/akebono.cgi
Digital Data

Instrument data

RDM (Plot & ASCII @ISAS DARTS)
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 http://www.darts.isas.jaxa.jp/stp/akebono/RDM.html
VLF (CDF @Kanazawa Univ.)
 https://akebono-vlf.db.kanazawa-u.ac.jp/
PWS (CDF @ISAS DARTS)
 http://www.darts.isas.jaxa.jp/stp/akebono/PWS.html
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Orbit (ASCII @ISAS DARTS)
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Daily data http://darts.isas.jaxa.jp/stp/data/exosd/orbit/daily/
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Weekly data http://darts.isas.jaxa.jp/stp/data/exosd/orbit/weekly/

PWS
VLF
E-field
VLF
B-field
RDM