turbulence and seeing measurements at dome c a collaboration unsw, ctio and the university of nice
Post on 18-Dec-2015
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Turbulence and Seeing measurements at Dome C
A collaboration UNSW, CTIO and the University of Nice
What did we learn at the South Pole?
South Pole 2001… …and Dome C 2003
The boundary layer cycle
The cycle in the Dome C Summer
00:00 06:00 12:00 00:0018:00 06:00 12:00 00:0018:00
1.00.8
0.0
0.4
1.2
1.6
Best seeing when: 1) Minimum radiation from the Sun 2) Minimum Thermal gradient
The cycle in the Dome C Summer
Free atmosphere turbulence
Effect of the high altitude wind:
Paranal
MASS first data 24/03
Seeing
Mauna Kea
Paranal
Isoplanatic Angle
Paranal
Paranal
Coherence Time
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