1 space environment measurements by jaxa satellites and iss takahiro obara space environment group...
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Space Environment Measurements by JAXA Satellites and ISS
Takahiro OBARASpace Environment Group
Japan Aerospace Exploration Agency (JAXA)
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Surface degradation
CCDs noises
Space Environment Effects
Solar cell degradation
Electronics degradation
ElectrostaticDischarge
Phantom commands
Single Event
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Space Environment EffectsEnvironment Effects
Vacuum Contamination
Neutral Aerodynamic dragAtomic oxygen attack
Plasma Spacecraft chargingElectrostatic DischargeReattraction of contamination
Radiation Particles Total Dose Effects Solar Cell, ElectronicsSingle Event Effects Upset, Latch up......Internal Charging
Micrometeoroid/Orbital Debris
Hypervelocity Impacts
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宇宙環境監視衛星 (2010年1月現在)
ETS-Ⅶ
ISS(JEM)
Jason-2
GOSAT
ALOS
ADEOS-Ⅱ
ADEOS MDS-1
ETS-Ⅵ
ETS-Ⅴ
DRTS
ETS-Ⅷ
QZSS
運用中
運用中
運用中
運用中
運用中 運用中
静止軌道(高度36,000km)
静止トランスファー軌道(高度250~40,000km)
太陽同期準開帰軌道(高度600~900km)円軌道(高度600km以下)
運用予定
Space Environment Monitoring
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Space environment measurementSatellite Name Launch Data ( Altitude )
TypeETS-V 1987.8 ( 36000km )
GEO ETS-VI 1994.8 ( 8000 ~ 38000km )
GTO ADEOS 1996.8 ( 800km )
LEOETS-VII 1997.11 ( 500km )
LEOSTS-89 1998.1 ( 300km )
LEOISS 2001 ( 400km )
LEOMDS-1 2002.2 ( 250 ~ 36000km )
GTODRTS 2002.9 ( 36000km )*
GEOADEOS-II 2002.12 ( 800km )
LEO ALOS 2006.1 ( 700km )*
LEOETS-VIII 2006.12 ( 36000km )*
GEOJason-2 2008.6 ( 1336km )*
LEO GOSAT 2009.1 ( 700km )*
LEOJEM/SEDA-AP 2009.5 ( 400km )*
LEO QZS 2010.9 ( Quasi Zanies Orbit )* QZO
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’87 ‘90 ‘93 ‘96 ‘99 ‘02 ‘05 ‘08 ‘11 ‘14 ‘17 ’20
Activity
GEO
Alt.36000
8000
LEO
1300
800
600
400
250ApplicationItems
MIN MAX MIN MAX MIN MAX MIN
ETS-5 ETS6
MDS1
DRTSETS-8
ERGADEOS
ADEOS 2GOSAT
Jason-2
QZS1
Space Environment MonitoringRadiation Belt Model
RB Science
Warning Information
ALOS
Radiation Measurements in JAXA
ISS/JEM/SEDA-AP
Jason-3
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Radiation Particle Measurementalong
GTO satellite
MDS-1 (2002.2-2003.8) 8
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(Obara et al., 2005)9
MDS-1 (TSUBASA) Measurement
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(Obara et al., 2005)
MDS-1 (TSUBASA) Measurement
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(Kasahara et al., 2008) 11
Seed Electron & plasma wave measurements
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MDS-1 MeV electron vs. Akebono VLF
VLF waves
MeV electron
(Obara et al., 2005)12
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plasma sheet
Seed electrons
plasmaspauseEnhanced convection
Intensification of Plasma Waves
Wavegrowth
2-step acceleration model
30 ~ 100 keV
(Obara et al., 2001)
Hot electrons~ keV
①
②
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Time evolution of f(K)
f0(K)
f 3000(K)
(Omura et al., 2008)14
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JAXADYNAMIC MODEL
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NASA AE8MODEL
New Model Development
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MDS-1 Observation
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JAXADYNAMIC MODEL
Comparison with Obs. Data
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Radiation Particle Measurementat
GEO satellites
DRTS (2002.9- ) ETS-V (1987.8-1997.9 ) 17
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Seasonal Variation of MeV Electrons at GEO
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ETS-8 data (1988-1997)
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Seasonal Variation of MeV Electrons at GEO
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ETS-V MeV electron flux vs. SW sector structure
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SPRING-> Toward
AUTUMN-> Away
rule
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03
20
04
20
05
20
06
20
07
20
08
AWAY
TOWARD
AWAY
TOWARD
AWAY
TOWARD
AWAY AWAY
TOWARD
AWAY
TOWARD
AWAY
exception
exception
DRTS MeV Electron Flux vs. Solar Wind Sector Structure
exception
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SPRING-> Toward
AUTUMN-> Away
rule
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Radiation Particle Measurementat
LEO satellites and ISS
ISS/SEDA-AP (2009.7- )
Jason-2(CNES) (2008.6- )
GOSAT (2009.1- )
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JEM (Japanese Experimental Module)
Exposed Facility
Space Environment DataAcquisition Equipment (SEDA)
HIT:Heavy Ion Telescope
NEM:NeutronMonitor
PLAM:Plasma Monitor
MPAC&SEED: Micro-Particles Capture and SpaceEnvironment Exposed Device
EDEE : Electric DeviceEvaluation Equipment
SDOM:Standard DoseMonitor
AOM : Atomic OxygenMonitor
Pressurized Module
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Observation at 400km altitude
(Obara et al., 2010)
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AE8 Model at 400km altitude
Significant movement ( or shift ) of intense region
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Jason-21336 km
GOSAT700 km
ISS400 km
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Dynamic Variation of Outer Belt Electron at LEO
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2010/1/1 - 2010/1/10 2010/4/1 - 2010/4/10
After Large Magnetic Storm on April 5, Large Increase of High Energy Electron Flux took place.
30keV Electron Data : Jason-2
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Injections of 45 keV Electrons were found, which reached down toL=2.3~2.5 ( Mlat ~ 50 degree ). This is VERY consistent with Jason-2 data.
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(Ebihara et al., 2010)
Simulation / model calculation
30~40 keVElectrons
Due to the large convection E fioeld, enegeticelectrons approach toward the Earth
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Space Environment Measurementat
QZS orbit
QZS-1 (2010.9- ) QZS-1,2 and 3
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QZS-1 satellite:
TEchnical Data Acquisition Equipments (TEDA)
TEDA consist of three parts;
( 1 ) Light Particle Telescope : LPT( 2 ) MAgnetoMeter : MAM( 3 ) POtential Monitor : POM
With these data, JAXA will identifythe cause of the satellite anomaly.
MAM-S1
MAM-S2
POM-S
LPT
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QZS-1 Covering Region
0.1MeV
0.8MeV
1 Day
- QZS-1 Orbit and Electron Flux -
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over Japan
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Line of forceLine of force
X Earth Radius
MAGDAS, SERC, Kyushu Univ.
Projection along the field line
Map onto the Earth
Altitude : 32000~40000kmLaunch; Sept.11, 2010
QZS-1 satellite:
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Data service http://sees.tksc.jaxa.jp
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Real Time Plots
Useful Tools for Satellite Environment Reseach
Observation Data
electron
Anik(Canada)E-1 、 E-2 trouble
WWW Browser System
1. Measurement Data 18 observation data display. Offer to the inside and outside of JAXA
2. Warning mail systemWarning notification: X rays, solar proton, and high energy electron
3. Satellite environmentalmodel and analysis tool90 kinds of space environmental models. Display of satellite environment in 2D and 3D.
JAXA SEES
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