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Diapositive 1

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... Tim van Zoest GeoAzur / OCA (France) : Gilles M tris, Etienne Samain IGEP, TU ... Laurent Lamy LKB / ENS (France) : Jean-Michel Courty, Brahim Lamine ... – PowerPoint PPT presentation

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Title: Diapositive 1


1
Outer Solar System (OSS)A Planetary and
Fundamental Physics Mission to Neptune, Triton
and KBO
B. Christophe on behalf of OSS Team
2
OSS
Planetary Physics
Fundamental Physics
Kuiper Belt Object
Argo, New Frontiers 4 Mission to Neptune, Triton
and KBO
Odyssey, Cosmic Vision 1 Mission to test deep
space gravity
Eddingtons Parameter at 10-7
NeptuneTriton
Deep SpaceGravity at 10 pm/s2
Inline with Fundamental Physics Roadmaps Advisory
Group Report
3
Deep Space Gravity Test
Accurate Navigation of S/C
Positioning
What is the S/C trajectory ?
Radio-Science
1-way or 2-ways
Laser-Science
XKa band VLBI
4
Laser Science two concepts
One-way pulsed laser (proposed by E. Samain OCA)
Two-ways continuous coherent laser (proposed by
P. Wolf SYRTE)
TESA TCL Terminal
Adaptative Optics on ground
1064 nm
Mercury Ion JPL or Horace Syrte clock
5
Deep Space Gravity Test
Accurate Navigation of S/C
Positioning
What is the S/C trajectory ?
Radio-Science
1-way or 2-ways
Laser-Science
XKa band VLBI
Non Gravitational Forces
Is S/C on a geodesic ?
DC Accelerometer lt 10 pm/s2
6
DC Accelerometer GAP
Electrostatic accelerometer MicroSTAR based on
heritage of CHAMP, GRACE and GOCE
missions (developed by ONERA)
Perfo 1 pm/s2
Bias Rejection System rotating stage with
piezo-electric motor(developed by ZARM)
For more details, see Benjamin Lenoir Poster
7
General Relativity Test / Geodesy
Deep Space Gravity (OSS)
Gravitational Wave (LISA)
Equivalence Principle (Microscope)
Orbit determination Measure of NG
Differential acceleration Drag Compensation
Variation of Laser Link Drag Compensation
GRACE / NGGM
GOCE
CHAMP
8
OSS Spacecraft
Planetary instruments UV Spectrometer 5.0
kg / 12 W High Resolution Narrow Camera 9.8 kg /
14 W IR Spectrometer / Wide Angle Camera
10.1 kg /7.5 W Radio Plasma Wave 4.7 kg
/ 7.9 W Thermal Map Imager 7.0 kg / 20
W Magnetometer 3.3 kg / 3 W Dust Particle
Detector 3.5 kg / 9 W
9
Self-gravity Management
  • Accelerometer at S/C CoG
  • S/C mass far from accelerometer
  • Symmetry of tanks
  • Membranes for ergol location
  • Thermal Gauging Book Keeping for ergol mass


Self-gravity lt 14 pm/s2
10
Conclusions
  • OSS was not selected by ESA for Cosmic Vision M3
  • Fundamental Physics Objectives considered strong
  • Planetary Objectives considered weak (flyby
    instead orbiter)
  • RTG availability considered as a risk
  • Launcher cost by US considered as a strategic
    risk
  • OSS allows to do pioneer work on
  • Merging of Fundamental and Planetary Physics as
    recommended by FPRAT
  • Adaptative optics for 2-ways laser link
  • DC accelerometer with 1 pm/s2 accuracy
  • S/C design for severe self-gravity requirement
  • Future works should concerns
  • Integration of the DC accelerometer in the S/C
  • Convincing planetary community of interest of
    accelerometer

11
Acknowledgement to OSS scientific supporters
  • European side PI B. Christophe (ONERA)
  • CESR (France)  Nicolas André
  • DLR / Institute of Planetary Research (Germany)
    Ralf Jaumann, Jörn Helbert, Hauke Hussmann,
    Nicole Schmitz, Frank Sohl, Katrin Stephan
  • DLR / Institute of Space System (Germany)
    Hansjörg Dittus, Marco Sharringhausen, Tim van
    Zoest
  • GeoAzur / OCA (France) Gilles Métris, Etienne
    Samain
  • IGEP, TU Braunschweig (Germany) Karl-Heinz
    Glassmeier, Daniel Heyner
  • Imperial College (United Kingdom) Patrick
    Brown, Michelle Dougherty, Tim Sumner
  • Institute for Geophysics and Meteorology / Univ.
    Köln (Germany) Martin Pätzold
  • Institute for Planetology / Westfälische Wilhelms
    Universität (Germany) Harry Hiesinger
  • Institut für Geowissenschaften / Max Planck
    Institute (Germany) Frank Postberg, Ralf Srama
  • Institut für Physik und Astronomie / Universität
    Postdam (Germany) Jürgen Schmidt
  • Instituto Superior Técnico (Portugal) Frederico
    Francisco, Paulo J.S. Gil, Jorge Páramos
  • JIVE (The Netherlands) Sergei V. Progrebenko
  • LATMOS (France) Jean-Louis Bertaux, François
    Leblanc, Eric Quemerais
  • LESIA / Observatoire de Paris (France) Antonella
    Barucci, Baptiste Cecconi, Laurent Lamy
  • LKB / ENS (France) Jean-Michel Courty, Brahim
    Lamine, Serge Reynaud
  • ONERA (France)  Bruno Christophe, Bernard
    Foulon, Benjamin Lenoir, Agnès Levy, Vincent
    Michau, Clélia Robert, Marc Séchaud, Pierre
    Touboul
  • Rutherford Appleton Laboratory (United Kingdom)
    Robert Bingham
  • Service d'Astrophysique/IRFU CEA Saclay
    (France)  Roland Lehoucq

11
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