Update of the French activities
relevant to ILWS
Jean-Yves Prado, CNES
Status of CNES projects
■ PICARD
 Phase C/D in progress
 Launch planned for june 2009
 Science Workshop at Yale in March, next in Toronto in July
■ TARANIS
 Phase B will end in september
 NASA funding for JHU/APL XGRE inst through SMEX/MoO AO- No information
 Launch expected for 2011-12
■ SMESE
 Phase A ended in May ’08
 Well attended Science Workshop in Paris last March
 Next step to be discussed during CNES ‘SPC’ this week – 4 options presented
 Launch objective 2012-2013
■ ALL BASED ON MYRIADE PLATEFORMES
ILWS
Prague, 11-12 June, 2008
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PICARD SCIENTIFIC PRODUCTS
in orbit:
- Diameter, limb shape and asphericity in the continuum
- TSI (x2)
- 5 spectral channels (215,393, 535, 607, 782 nm)
- Activity (images at 215 nm and Ca II)=> space weather
- Solar oscillations
from the ground :
- diameter, limb shape and asphericity,
- local atmosphere turbulence
ILWS
Prague, 11-12 June, 2008
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THE PICARD SPACECRAFT
SOVAP
PREMOS2
SODISM
ILWS
Prague, 11-12 June, 2008
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TARANIS OBJECTIVES
Description
- characterization of the sprites and associated emissions, measurements of their occurrence
frequency and of their distribution at the scale of the earth. (caméras, EM waves, X and 
spectra, high energy electrons)
- study of the effects of the magnetic latitude and volcanic activity
Implied mechanisms
- determination of the nature of the triggering phenomena (cosmic radiation)
- determination of the source mechanisms (EM waves, X and  spectra, high energy electrons)
- study of the nature of the explosive dissipation of energy in the ionosphere and
magnetosphere (EM waves, X and  spectra, high energy electrons)
Global impact
- determination of the effects on the upper atmosphere, ionosphere and magnetosphere (EM
waves, high energy electrons, associated ground based measurements, other satellites)
- evaluation of the coupling atmosphere - ionosphere - magnetosphere and inter-planetary
medium
ILWS
Prague, 11-12 June, 2008
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TARANIS
•
Dedicated to understanding
Atmosphere/ionosphere/magnetosphere
coupling (sprites, elves, blue jets…)
Microcameras + photometer -MCM- CEA (+JP)
EM measurements -IEMLPCE (+PL,TCH)
X-gamma Detector -XGDJHU/APL (USA), DNSC (DK)
Detector of high Energy ElectronsCESR (+TCH)
• Quasi Sun Synchronous Orbit (2hrs LT drift/year)
• Phase B to end in September
• XGRE funding from NASA yet not known
• Launch >2011
ILWS
Prague, 11-12 June, 2008
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SMESE General View
LYOT
HEBS
ILWS
Prague, 11-12 June, 2008
DESIR
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SMESE payload required performances
Wavelength/
Energy
Field of
View
Spatial
resolution
Cadence
LYOT :
La imager
121.6 nm
Full Disk
1.1 arcsec
10 s
LYOT :
La coronagraph
121.6 nm
5*5 solar
radii
2.3 arcsec
20 s
35 ≤ 1 ≤ 80
microns
100≤ 2 ≤ 250
microns
Full Disk
50 arcsec at
35 microns
100 ms
Full Disk
Full disk
1 s, down to
32 ms
DESIR :
Infra-red
Telescope
HEBS
ILWS
10-500keV
200keV-10MeV
10MeV-600MeV
Prague, 11-12 June, 2008
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SMESE Firsts
■ First combined imaging (disk, corona) in Ly a with high time resolution and
sensitivity to trace the development of CMEs in the low corona + first
polarimetric corona measurements,
■ First ever measurements of solar flares in the far infrared, key range for
relativistic leptons and chromospheric plasma heated during flares,
■ First hard X-ray/gamma ray spectrometry at the highest energies ever attained
with a solar-dedicated instrument, to study the most energetic electrons and
nuclear processes in the Sun’s atmosphere.
■ Interest for Radiobiology
ILWS
Prague, 11-12 June, 2008
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Mission sequence
PICARD
SMESE
TARANIS
ILWS
Prague, 11-12 June, 2008
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Others
• STEREO Space Weather beacon Ground Station operational since Feb.
• Operational coordination between DEMETER and C/NOFS
• Radiation monitors onboard SAC-C, SAC-D, JASON 2
ILWS
Prague, 11-12 June, 2008
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ILWS
Prague, 11-12 June, 2008
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MYRIADE SERIES
• More than 20 spacecraft based on the same bus and systems
in flight or in preparation
Bus waiting row
60x60x50 cm bus
S-Band TTC (Kiruna/Toulouse)
ILWS
Prague, 11-12 June, 2008
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MYRIADE CAPACITY
■ Orbit inclination > 20°
■ Altitude 600km< >1000km
■ DNEPR launcher as the reference
■ Geocentric, inertial, solar or along the velocity vector pointing
■ Pointing precision of 0.1 ° (actuation), 5.10-3° (knowledge)
■ Attitude control system in nominal mode uses a stellar sensor, four
reaction wheels and three magnetic torquers
■
■
■
■
ILWS
up to 80 kg mass allocation to the P/L (when no propulsion/TM-X)
Power available to the P/L > 60w (highly orbit dependant)
Mass memory 16 Gbits
S-Band 400 kb/s as baseline
Prague, 11-12 June, 2008
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MYRIADE OPTIONS
■
propulsion DV ~80 m/s (DEMETER, TARANIS…)
■
X-Band telemetry (>a few Gbits/day)
TM rate 16-50 Mb/s depending on the ground station G/T
■
additional sun pointing device (PICARD, LYOT/SMESE)
■
quick deorbit kit under study
ILWS
Prague, 11-12 June, 2008
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A few examples of the MYRIADE versatility
• DEMETER, TARANIS
waves and particle instruments
• PARASOL
Lidar for atmospheric science
• PICARD, SMESE
Solar observation
• MICROSCOPE
Fundamental physics
• ARGOS
Localization
• ESSAIM, SPIRALE, ELINT Defense
•…
• commercial availability of the bus (ASTRIUM, AAS)
DNEPR launch
ARIANE 5 launch
ILWS
Prague, 11-12 June, 2008
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FURTHER INTERNATIONAL COOPERATION
Earth Observation as a paradigm?
- a unique object, many possible instruments
- curiosity driven science in competitition with monitoring science
- shift from mammoth s/c (ENVISAT…) to series of small specialized satellites
A Solar Train?
ILWS
Prague, 11-12 June, 2008
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