1. Status
Following these success of VSOP, science targets of VSOP-2 approach the central region of AGN.
studies of accretion disks and jets in AGN
studies of non-thermal emission from YSOs
And we revenge the maser observations.
the highest resolution studies of Galactic masers and extragalactic megamasers.
And the capability of other observations have been discussing.

2. ASTRO-G current status
Budget Request to the government. (July, 2007)
Approved as a new project. (not a full)
Project team formation
Project Manager: Hirobumi SAITO + ~20 engineering staffs
Edwards Akihiro DOI (April~)
Hirabayashi Masato TSUBOI (April~)
NAOJ: Kameno is now in Kagoshima-U. 　　　Hagiwara (Nov.~)
New Post-Doc in JAXA and NAOJ
Contractor Selection.
Bus system, Main Antenna, Coolers
On going : Thrusters, Low Noise Receivers
I/F control document (ICD) preparation. (March-May, 2007)
Preparation of stating the project from April, 2007
System Definition Review (March, 2007)
Review for Project Starting. (March, 2007)
Following these success of VSOP, science targets of VSOP-2 approach the central region of AGN.
studies of accretion disks and jets in AGN
studies of non-thermal emission from YSOs
And we revenge the maser observations.
the highest resolution studies of Galactic masers and extragalactic megamasers.
And the capability of other observations have been discussing.

3. Deployment of ETS-VIII antenna (Dec. 25-26, 2006)
We use …
NASDA HPでcheck!

4. Deployment of ETS-VIII antenna (Dec. 25-26, 2006)
We use …
NASDA HPでcheck!

7. VSOP-2 System Block Diagram
Observing System
Telemetry handling/heater control system
Telecommunication/
Command System
Attitude and orbit
Control system
GPS　＋ 加速時計　での高精度軌道決定（３ｃｍ以下の精度）
４リアクションホイール＋２CMGで高速姿勢変更に対応
Power supply system

8. VSOP-2 “Latest” Block diagram of the observation system
Antenna, I talked ahead.
Frontend, horn, LNA, BPF
I show the development of some systems in briefly.

9. ASTRO-G GPSR status 3 candidates
JPL GPS receiver.
Blackjack : ~ IGOR, Blackjack
New development for including Galileo
IDC (I/F control Document) -> Need JAXA/JPL contract
BRE
IGOR ~ Blackjack: 4 RF ch, 48 tracking ch., L1, L2, GPS only
Pyxis: 4 RF ch. 96 tracking ch, L1, L2, L5, GPS/Galileo
Domestic JAXA/NEC-Toshiba Space GPSR
2 Ch RF, 8 ch, L1, L2, GPS only
Need do decide weather we need Galileo or not ? (Feb. 2007)
Need ICD for ASTRO-G soon (April 2007)
Budget source ? JPL ? / ISAS (JAXA)
Following these success of VSOP, science targets of VSOP-2 approach the central region of AGN.
studies of accretion disks and jets in AGN
studies of non-thermal emission from YSOs
And we revenge the maser observations.
the highest resolution studies of Galactic masers and extragalactic megamasers.
And the capability of other observations have been discussing.

10. ASTRO-G LNA status Accelerometer : Decided not to use for ASTRO-G
Study of SLR possibility.
candidates
Domestic Development
EUDYNA(Former Fujitsu) Device (Baseline)
Discrete HEMT for 8 GHz.
MMIC HEMT (InGaP／InGaAs p-HEMT) development (22, 43 GHz)
InP development (other budget)
NRAO RX
European RX
Need to discuss cost, schedule, ICD for possible laboratory.
Need ICD for ASTRO-G soon (April 2007??)
Budget source ? ISAS (JAXA)/ JPL or ESA/EC …
Following these success of VSOP, science targets of VSOP-2 approach the central region of AGN.
studies of accretion disks and jets in AGN
studies of non-thermal emission from YSOs
And we revenge the maser observations.
the highest resolution studies of Galactic masers and extragalactic megamasers.
And the capability of other observations have been discussing.

11. Design of the frontend LNA MMIC HEMT LNAs
Wide band, low loss feed and polarizer studies
Cryogenic studies
Space-qualified cryogenic coolers
ASTRO-E2 (Xray) ASTRO-F(Infrared)
PLANET-C(Vinus) SMILES (Earth Obs.)

12. Current status of Front-end Developments
22/43 GHz Cooled Receiver
MMIC Device
High Quality & Reliability GaAs MMIC HEMT device
Low Power Consumption
Microwave components
Low Thermal Conductivity WG
Circular Polarizer
Horn
Possibility of design without isolator
Thermal Shield at horn window
Layout components
110 K
30K
2 coolers ?
ASTRO-F type
Observing frequencies of VSOP-2 are these. We revenge the 22GHz of HALCA.
For now, 22 and 43 GHz receivers are cooled. But 8GHz is not cooled because of the restriction of mass and power budget.
Wide band data downlink is one of technical challenges.
These bring the improvement of sensitivity.
Apogee height is about 25000km, so we can get the resolution of 75 mas for 22GHz and…
And other option are these.
Phase-ref brings more higher sensitivity and astrometric observation.
Dual polarization bring us the studies of magnetic field.

13. Schedule
Following these success of VSOP, science targets of VSOP-2 approach the central region of AGN.
studies of accretion disks and jets in AGN
studies of non-thermal emission from YSOs
And we revenge the maser observations.
the highest resolution studies of Galactic masers and extragalactic megamasers.
And the capability of other observations have been discussing.

14. ASTRO-G Development schedule
Financial Year
(Apr-Mar)
2000～ 2005
2006
2007
2008
2009
2010
2011
2012 ～
Spacecraft
Development Phase
Events
Tracking Stations
Ground Radio
Telescopes.
Concept
Design
Basic Design
Detailed D.
Manufacture and Test
Operation
WG phase
Pre-Project PM
FM Design
FM Manu
I/F
test
Unit
test
Final Test
FOp
Operation
Phase -E
Pre Phase -A
Phase -A
Phase -B
Phase -C
Phase -D
Launch
△ Project starts
△ Review
△ Review
△ Review
△ Review
More than
5 years
operation △ △ △ △ △
△Budget
Request
Selection of the science mission in ISAS
△System I/F Fixed
Approval of project preparation
Design of
PFM Structure
Antenna, Obs.system
Attidute control system
NEXT (X)
Solarsail (Jupiter)
△Selection of
contractors
Ground Tracking Stations
Developments
Op. Test

15. ASTRO-G Development schedule (Observing system)
Financial Year
(Apr-Mar)
2000～ 2005
2006
2007
2008
2009
2010
2011
2012 ～
Spacecraft
Development Phase
System HW
Main Antenna
GPS, LNA, other Units
Observing System
Ground
System (USUDA)
Concept
Design
Basic Design
Detailed D.
Manufacture and Test
Operation
WG phase
Pre-Project PM
FM D.
FM M.
I/F T
Unit
test
Final T.
FOp
Operation
△7B
Phase -E
Pre Phase -A
Phase -A
Phase -B
Phase -C
Phase -D
Launch
ICD FIX
△Review
△Review
△Review
Concept D.
Basic D.
MTM/TTM
Detailed D.
MTM/
TTM M.
MTM/
TTM T.
PFM R.
I/F T.
Final T. F Op
In Orbit
Operation
△11B
△10B
△7B
△2B
△8M
△2B
△7B
△12B
10B△
△2B ↑ ↓
Concept D.
1 Module
Basic D.
Main Str.
Detailed D.
Main Str. M.
PFM R.
Antenna T.
I/F T.
Final T. F Op
In Orbit
Operation
ICD FIX
6M △ FM D. FIX
△ I/F Test (11)
S/C simulator
EM D.
EM M.
EM T.
Concept
Design
△3B
△1B
△7B
△11B
FM D.
FM M.
FM T
△3B
Freq Control
Doppler Mes.
AUX data extract
(When? -TBD)
△7B
△5B
△10B
IF I/F
QPSK DEM
VSI I/F D M. T D M. T
△9B
△6B

16. ASTRO-G TS Development schedule (DRAFT)
Financial Year
(Apr-Mar)
2000～ 2005
2006
2007
2008
2009
2010
2011
2012 ～
Spacecraft
Development Phase
Observing System
Usuda TS
US budget &
TS (GB?)
European budget & TS
(YEBES)
Other TS Southern H.
Concept
Design
Basic Design
Detailed D.
Manufacture and Test
Operation
WG phase
Pre-Project PM
FM D.
FM M.
I/F T
Unit
test
Final T.
FOp
Operation
△7B
Phase -E
Pre Phase -A
Phase -A
Phase -B
Phase -C
Phase -D
Launch
ICD FIX
△Review
△Review
△Review FM
△ I/F Test (11)
S/C simulator
EM D.
EM M.
EM T.
△Ready for TS
(9)
Concept
Design
△3B
△1B
△7B
△11B D M. T D M. T
IF I/F
QPSK DEM
VSI I/F
Freq Control
Doppler Mes.
AUX data extract
(When? -TBD)
△9B
△6B
request△11
△3 review
△8 MoO
deadline
△9 MoO
deadline
Concept Study money
GTS
GRT
Op.
Test D M. T
EC FP7
deadline
Budget
National
Agency
To ESA D M. T D M. T

17. VSOP-2 international collaborations
VSOP-2 collaboration
Based on VSOP type collaboration
Tracking stations (1 JAXA, 1-2 NASA, 1 ESA)
Compatibility test at 2010
GRT(Ground Radio Telescope)’s and Correlater (GVWG)
E-ASIA Collaborations: GRT, Correlater, Receiver ?
EVN, SKA, VLBA, Australia, Asia…
GRT test observation at 2011.
Pre-launch survey
Navigation
On-borad instruments (Not in VSOP)
GPSR, Accelerometer, Transmitter
LNA
Simulator, AIPS(++?) update.
Forming International WG.
International Science Team (Survey etc..)
Following these success of VSOP, science targets of VSOP-2 approach the central region of AGN.
studies of accretion disks and jets in AGN
studies of non-thermal emission from YSOs
And we revenge the maser observations.
the highest resolution studies of Galactic masers and extragalactic megamasers.
And the capability of other observations have been discussing.

18. Mission Responsibility Plan (DRAFT)
Budget
Oper.
Spacecraft
JAXA
GPSR
JPL
Or JAXA (TBD)
LNAs
TBD
JAXA+NAOJ in current plan, Add better one?
NAVIGATION
JAXA and JPL?
GTS: Usuda
GTS: Greenbank
NRAO
GTS: Yebes
ESA
OAN
GTS: Southern H.
GRT: EAVN
J+K+C
each
Japanese/Korean/Chinese antennas
GRT: VLBA
GRT: EVN
JIVE
EVN
GRT: others
Cor: Korea-Japan
J+K
KASI
J+K=NAOJ+KASI
Cor: VLBA
Cor: JIVE
TBD?
Others
Simulator, AIPS’, International WG (VISC2, GVWG),
Science Center?,
Following these success of VSOP, science targets of VSOP-2 approach the central region of AGN.
studies of accretion disks and jets in AGN
studies of non-thermal emission from YSOs
And we revenge the maser observations.
the highest resolution studies of Galactic masers and extragalactic megamasers.
And the capability of other observations have been discussing.