Need	  a	  range	  of	  mission	  op*ons	  	  to	  maximize	  launch	  poten*al	• JAXA	  has	  two	  launchers	  (H-­‐IIA/III	  and	  Epsilon)	  that	  can	  poten*ally	  support	  a	  range	  of	  small	  and	  medium	  missions.	  	  • The	  JAXA	  launch	  schedule	  for	  a	  big	  mission	  like	  the	  original	  Solar-­‐C	  (to	  be	  launched	  by	  H-­‐III)	  is	  crowded	  for	  the	  next	  15	  years;	  for	  this	  reason	  the	  team	  should	  produce	  a	  range	  of	  missions	  in	  order	  to	  maximize	  launch	  poten*al.	  	
2016/09/09	

9	Space	  Policy	  Commission	  under	  cabinet	  oﬃce	  intends	  to	  guarantee	  predetermined	  steady	  annual	  budget	  for	  space	  science	  and	  explora*on	  to	  maintain	  its	  scien*ﬁc	  ac*vi*es	  	2010
Strategic Large Missions(300M$ class) for JAXA-led
flagship science mission
with HIIA /III vehicle(3 in ten years)
Competitively-chosen
medium-sized focusedmissions (<150M$ class)with Epsilon rocket(every 2 year)		
Missions of opportunity
for foreign agency-ledmission
2016/09/09	

[Slide	  from	  ISAS	  director]	

20202030		

Astro-H (2016) 	
Phobos/Deimos (2022)		
LiteBIRD, Solar-Sail, Solar-C (2025)
SPICA (2027-28)		
Hisaki(2013)		
ERG (2016)	
SLIM(2020) 	
#4 (2022)#5(2024)	

Proposals
being reviewed

BepiColombo (ESA, 2016)		
JUICE (ESA, 2022)	
WFIRST(NASA, 2025)	
ATHENA(ESA, 2028)

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NASA NewFrontiers2016

[Slide	  from	  ISAS	  director]	

Strategic L-classmissions with HIIA/HIII	
#4	  ESA-­‐Led	  SPICA		FY2027-­‐28		
FY2025		

Large-­‐size	  #3	  Under	  selec*on	   #2	  Mar2an	  Moons	  LiteBIRD,	  Solar-­‐Sail,	   eXplorer	  (MMX)		
(Solar-­‐C)	  Strategic Large Missions(300M$ class) for JAXAled flagship science
mission with HIIA/H3vehicle (3 in ten years)#1	  ASTRO-­‐H	  (Hitomi)		
FY2022		
FY2016		

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[Slide	  from	  ISAS	  director]	

Competitive M-classmissions with Epsilon	

Medium-­‐size	  #4	  Under	  selec*on	   #3	  Moon	  landing	  (SLIM)			  FY2021		

#2	  van	  Allen	  belt	  (ERG)		
FY2019		

#1	  Hisaki	  (UV	  planet)		

FY2016		

Competitively-chosen
medium-sized focusedmissions (<150M$ class)with Epsilon rocket
2016/09/09	
(every 2 year)		

FY2013		12	Solar	  physics	  mission(s)	  in	  mid.	  2020s	
• Solar-­‐C	  for	  strategic	  L-­‐class	  #2	  (~2025)	  is	  s*ll	  the	  ﬁrst	  priority	  in	  the	  Japanese	  solar	  physics	  community.	  	  – The	  compe**on	  will	  be	  tough	  in	  the	  2025	  slot.	  	  – If	  Solar-­‐C	  is	  not	  selected,	  it	  will	  be	  shiZed	  to	  beyond	  2030.	  	  • Japan	  should	  have	  at	  least	  one	  solar	  physics	  mission	  in	  hand	  in	  2020’s.	  	  	  • ShiZing	  to	  “Compe**ve	  M-­‐class	  missions	  with	  Epsilon”	  may	  	  increase	  the	  launch	  poten*al.	  
– We	  need	  to	  have	  good	  candidates,	  if	  we	  shiZ.	  
2016/09/09	

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JAXA	  Solar-­‐C	  WG:	  Internal	  study	  groups	
• The	  following	  study	  groups	  have	  been	  formed	  in	  June	  2016.	  

– Mid.-­‐size	  visible-­‐light	  telescope	  plan	  – UV	  spectro-­‐polarimetry,	  aZer	  CLASP-­‐2	  sounding	  rocket	  (2019?)	  – EUVST;	  high-­‐throughput	  UV-­‐EUV	  spectroscopy,	  evolving	  from	  a	  Solar-­‐C	  payload	  – (HCT;	  high-­‐spa*al	  resolu*on	  coronal	  imager,	  evolving	  from	  an	  op*onal	  Solar-­‐C	  payload)	  – Photon-­‐coun*ng	  X-­‐ray	  telescope,	  aZer	  FOXSI-­‐3	  sounding	  rocket	  (2018)	

2016/09/09	

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Nakaya	  et	  al.	  2015,	  ISTS	  Epsilon	  payload	

“Payload	  Interface	  Informa*on	  and	  Interface	  coordina*ng	  ac*vi*es	  of	  Enhanced	  Epsilon	  Launch	  Vehicle”	  hup://archive.ists.or.jp/upload_pdf/2015-­‐g-­‐17.pdf	  	• a	•	  •PBS	  is	  used	  for	  accurately	  installing	  sun-­‐synchronous	  orbit	  (SSO)	  Weight	  • 590	  kg	  for	  SSO	  500km	  	  (~450	  kg	  for	  600km)	

PBS	  –	  post	  boost	  stage	
2016/09/09	

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Solar-­‐C	  mee*ng	  today	• Phase	  1:	  Review	  Solar-­‐C	  science	  objec*ves	  and	  produce	  revised	  set	  of	  science	  goals.	  	  [NOW]	  •• Phase	  Assess	  mhission	  esign	  oind	  p*ons	  and	  Topics	  I	  2-­‐	  :	  Atmospheric	  ea*ng	  adnd	  solar	  w	  	  	  	  	  Tarbell,	  aymond,	  Ichimoto	  (leader),	  Shimizu,	  come	  up	  Rwith	  more	  than	  one	  mission	  Cdarlsson,	  esign	  	  	  	  	  	  Bellot	  Rubio,	  	  op*on	  to	  accomplish	  the	  objec*ves.	  	
• Topics	  II	  -­‐	  ﬂares,	  CME,	  and	  space	  weather	  	  	  	  	  	  McKenzie,	  Kusano	  (leader),	  Shimizu,	  Fletcher	  	  • Topics	  III	  -­‐	  Solar	  cycle	  and	  space	  climate	  	  	  	  	  	  Gibson,	  Hara	  (leader),	  Kusano,	  Solanki	  	2016/09/09	

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