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Solar Orbiter. Contents. The mission The orbit The instruments VIM: Visible-light Imager and Magnetograph Helioseismology with VIM. Solar Orbiter: the mission. Mission: Assessment phase Instruments: Concept phase

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Presentation Transcript
  • The mission
  • The orbit
  • The instruments
  • VIM: Visible-light Imager and Magnetograph
  • Helioseismology with VIM
solar orbiter the mission
Solar Orbiter: the mission
  • Mission: Assessment phase
  • Instruments: Concept phase
  • Objective: Produce images of the Sun at an unprecedented resolution and perform closest in-situ measurements
  • Launch: May 2015
  • End: January 2024
  • Cruise phase(3y), nominal phase(3y), extended phase(2y).
  • Solar Electric Propulsion  Chemical Propulsion
solar orbiter1
Solar Orbiter

solar orbiter the orbit
Solar Orbiter: the orbit
  • Elliptical orbit around the Sun
  • Proximity to the Sun  up to 0.27 A.U
  • Inclination of up to 35º
  • Cruise phase of approx. 3.4 year using gravity assists from Venus and Earth.  150-day-long science orbit.
  • Close encounters with the Sun.
  • Venus gravity assist maneuvers to increase inclination.
solar orbiter the orbit1
Solar Orbiter: the orbit

Assisted by a series of Venus swing-bys, the spacecraft’s 150-day orbit will evolve gradually over the mission lifetime from an inclination of about 12 to 35 degrees to the solar equator.

solar orbiter the instruments
Solar Orbiter: the instruments
  • Field Package:
    • Radio and Plasma Wave Analyzer
    • Coronal Radio Sounding and Magnetometer
  • Particle Package:
    • Energetic Particle detector
    • Dust detector
    • Neutron and Gamma-Ray Detector
    • Solar Wind Plasma Analyzer
  • Solar remote sensing instrumentation:
    • Visible-light Imager and Magnetograph (VIM)
    • EUV Imager and Spectrometer
    • Coronagraph
    • Spectometer/Telescope for Imaging X-rays
    • Radiometer ???
visible light imager and magnetograph vim
Visible-Light Imager and Magnetograph (VIM)
  • Vector magnetic field capabilities (priority).
  • Line-of-sight velocity maps by observing 4-5 points on either side of a spectral line. Mention the possible lines HMI, IMaX, GONG.
  • Two functions:
    • High resolution Telescope (HRT)
    • Full Disc Telescope (FDT)

Using two telescopes that share filtergraph optics and detector.

  • Magnetic field and velocities calculated on board
  • Telemetry restricted and only approx. ¼ of total VIM telemetry will be assigned to velocity data.
local helioseismology with vim
Local Helioseismology with VIM


  • Observation of high latitudes and the poles
  • Some very high resolution data
  • Proximity to the sun. Not really needed for helioseismology
  • Co-rotation (not clear what it means)
  • Maybe continuous 256x256 full disk data


  • Short series of data (~10 days every 50 days)
  • Variable resolution in a 512x512 grid (or less)
local helioseismology with vim1
Local Helioseismology with VIM
  • Dynamic/Magnetic description of the solar subsurface at high latitudes and the poles.
  • Rings:
    • Differential rotation close to the poles.
    • Meridional circulation: Solve the multi-cell circulation mystery…
  • Time Distance:
    • Dynamics down to the tacholine at the poles.
    • Combined VIM-HMI/GONG for deep interior research.
  • Holography
    • Farside calibration/mapping the near side
    • Mapping the poles.