ASTRO-G project VSOP-2 – VLBI Space Observatory Programme - 2. 10 times higher sensitivity . 10 times higher frequency observation 10 times higher resolution with ～ 40 m arcseconds. ~35,000 km. 9.26 m Antenna for Radio Astronomy Mass 1,300 kg (Nominal) 1 Gbps Data Downlink.
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10 times higher sensitivity.
10 times higher frequency observation
10 times higher resolution with ～ 40 m arcseconds
9.26 m Antenna for
Mass 1,300 kg (Nominal)
1 Gbps Data Downlink
Observing band 8, 22, 43 GHz
The next generation space VLBI (SVLBI) mission following the VSOP mission.
ASTRO-G project scientific objectives
Magnetic fields of galaxies
Observe Astronomical Objects with the highest resolution.
Jets from the accretion disks around black holes
Generate VLBI Array with Ground Radio Telescopes.
Review to be a pre-project
Design Review #2（PDR #2）
Design Review #3（CDR）
Design Review #1（PDR #1）
System Definition Review (SDR)
Observing system Test
Initial Orbit Check
EDC Manufacture and Test
EDC Detailed Design
EDC Basic Design
LDC Manufacture and Test
LDC Detailed Design
LDC Basic Design
Earlier Development Components (EDC) (Main antenna, Ka Ant., Cryostat, Main Structure, Thruster
Later Development Components (LDC): Observing system, GPS, SLR, and other BUS system
EAVN WS 2009 Mar 18
Current master schedule is based on the launch scheduled to be 2013 January/February
We are now Basic Design Phase ... (Phase -B) .
Preliminary Design Review (PDR) for earlier development subsystems (Antenna, KaANT, Structure, Thruster, Cryostat) have finished March 13, 2009. PDR of all system will be scheduled in March 2010.
Mechanical and thermal mathematical model are made, and the checking the system based on the model is on going.
Engineering Model of Horn to LNA was tested at ISAS till February.
Some Unknown factors
Usuda and Yebes (Spain)? now. One more?
Ground Radio Telescopes
EAVN, EVN, Australia, VLBA(?) & US, S.Africa (?), …
Japanese activities, (JVN upgrade for VSOP-2). Science Support
KJJVC, and others (Software correlators ?)
VISC-2 meeting @ December, 2008.
Submit space VLBI proposal to US Decadal Survey
Large deployable antenna system
RF Gain Requirement (43 GHz)
Radio Quiet Room in JAXA
Compact range system
1.5 m meshantenna for RF test
Test for a module
(Aug. – Sept. 2008)
(@ Sagamihara / JAXA)
RF Test＝＞Vibration Test＝＞RF Test＝＞SHIへ
(@ Osaka Pref. University)
RF Test＝＞Vibration Test（Sagamihara）＝＞RF Test
＝＞SHI （ 2008/11/1-2009 3/M）
Frontend Development Status
43 GHz (After Vibration Test)
22 GHz (After Vibration Test)
22 GHz Test Set (Sagamihara)
Satellite development is on-going.
Engineering Model Test for Antenna, Frontend, etc.
PDR #1 is finished in March 13th, 2009.
Currently it is in basic design phase (Phase-B)
International Collaboration is on-going.