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ASTRO-G project VSOP-2 – VLBI Space Observatory Programme - 2

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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ASTRO-G project VSOP-2 – VLBI Space Observatory Programme - 2

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  1. ASTRO-G projectVSOP-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 Observing band 8, 22, 43 GHz Dual polarization Phase-referencing capability The next generation space VLBI (SVLBI) mission following the VSOP mission.

  2. ASTRO-G project scientific objectives Radio galaxies Quasars 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.

  3. ASTRO-G Schedule FY2006 (H18) 2007 (H19) 2008 (H20) 2009 (H21) 2010 (H22) 2011 (H23) 2012 (H24) 2013 (H25) 2014 (H26) 2014 (H27) Review for Project Start Review to be a pre-project Design Review #2（PDR #2） Launch（Planned） Science Operation Design Review #3（CDR） Design Review #1（PDR #1） System Definition Review (SDR) Observing system Test Integration Test Initial Orbit Check EDC Manufacture and Test Flight Operation EDC Detailed Design EDC Basic Design Concept 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

  4. Current Status of ASTRO-G Satellite development 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.

  5. Current Status of ASTRO-G(Continued) Ground Facilities Some Unknown factors Tracking station 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 Correlators KJJVC, and others (Software correlators ?) International Collaborations VISC-2 meeting @ December, 2008. Submit space VLBI proposal to US Decadal Survey

  6. Large deployable antenna system RF Gain Requirement (43 GHz) 6 6

  7. Radio Quiet Room in JAXA Compact range system (September 2008)

  8. 1.5 m meshantenna for RF test

  9. Thermal/Vacuum Test for a module Of LDR (Aug. – Sept. 2008)

  10. 22/43GHz (@ Sagamihara / JAXA) RF Test＝＞Vibration Test＝＞RF Test＝＞SHIへ （2008/11/1-2009/2/19） ８GHz (@ 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) OK! Frequency [GHz] 22 GHz (After Vibration Test) OK! 22 GHz Test Set (Sagamihara) 10

  11. Summary 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.

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