Turbulence and Seeing measurements at Dome C

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Turbulence and Seeing measurements at Dome C

• A collaboration UNSW, CTIO and the University of
  Nice

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What did we learn at the South Pole?
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South Pole 2001
and Dome C 2003
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The boundary layer cycle
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The cycle in the Dome C Summer
Best seeing when 1) Minimum radiation from the
Sun 2) Minimum
Thermal gradient
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The cycle in the Dome C Summer
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Free atmosphere turbulence
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Effect of the high altitude wind
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MASS first data 24/03
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Seeing
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Isoplanatic Angle
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Coherence Time
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Conclusion

• Already spectacular Seeing values, expected to
  improve in winter
• Very advantageous ground level turbulence profile
• Need more data to conclude on the isoplanatic
  angle and coherence time