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SPICAM first results from MarsExpress, there is still some good planetary science to be done from or

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Title: SPICAM first results from MarsExpress, there is still some good planetary science to be done from or


1
SPICAM first results from Mars-Express, there is
still some good planetary science to be done from
orbiters and remote based telescopes!
  • C. Muller (1), D. Gillottay (1), D. Moreau (1),
    D. Fonteyn (1), S. Perrier (2), J.L.Bertaux (2),
    E. Quemerais (2), F. Lefèvre (2), O.Korablev (3)
    ,A. Fedorova (3)(1) Belgian Institute for Space
    Aeronomy, avenue Circulaire, 3, B-1180 Brussels,
    Belgium (2) Service dAéronomie du C.N.R.S.,
    Verrières-le-Buisson, France, (3) Institute for
    Space Research, Moscow, Russia,

2
Mars express
Chronology Dec 25 insertion Jan 12 Feb 20
first results, commissioning. April 15- May 7
deployment Marsis May 7 begin of nominal phase.
3
SPICAM First Observations of Mars Atmosphere
  • SPICAM a light-weight (4.5 kg) dual
    spectrometer, Ultra-violet and Near Infra-red
  • mainly dedicated to the study of gases (Carbon
    Dioxyde CO2), Ozone (O3), Water vapor (H2O).
  • First complete vertical profile of
    density/temperature of CO2 (10-110km) obtained
    ever from an orbiter
  • First simultaneous measurements of Ozone and
    water vapor from an orbiter
  • First use of a compact AOTF spectrometer (Near
    Infra-red)

4
UV
MEX/ SPICAM
SPICAM Ultra-Violet observations, orbit 8, 9
jan. 2004
IR
Absorption by gas
tv vertical optical thickness of absorption,
varies strongly with wavelength
?1
SPICAM near Infra-red observations, orbit 8, 9
jan. 2004
Scattering by surface with albedo A
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Atmospheric Transmission
SPICAM Ultra-Violet observations, orbit 17, 13
jan. 2004
ratio
MARS EXPRESS
SPICAM
Line of sight
Star
Atmosphere
Orbit
MARS
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Relevance of SPICAM measurements
  • Vertical profiles (10-120km) of CO2/atmosphere
    will allow to validate/modify current General
    Circulation Models (latitude, season) necessary
    for aerobraking/aerocapture predictions, help for
    future missions
  • Simultaneous measurements of ozone/water vapour
  • characterize the  Life conditions  on Mars
    surface
  • verify the theory that water vapour destroys
    ozone
  • High significance for future of the stratosphere
    of Earth growing concern that Global warming
    will result in potential new threat to the ozone
    layer (comparative planetology)
  • Measurement of surface properties
    characterisation of ices.
  • Observation of several proxies of aeronomical
    phenomena.

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OMEGA
visible
H2O
CO2
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PFS
16
Conclusions
  • An orbiter or a high spatial resolution telescope
    allow to follow the local and global environment
    at the same time.
  • Assimilation techniques will allow the link
    between the microscale provided by landers and
    the global scale.
  • Finally, remote sensing of the subsurface
    environment has still to be proven.
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