Title: Diapositive 1
1Outer 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
3Deep 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
4Laser 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
5Deep 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
6DC 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
7General 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
8OSS 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
9Self-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
10Conclusions
- 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
11Acknowledgement 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
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