Cerro Pachon Cn2 profile

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MOAO Ensquared Energy vs Laser Guidestar
Constellation Geometry Don GavelJuly 13, 2005

• Cerro Pachon Cn2 profile
• r0 16 cm
• Science wavelength 1mm
• 90km laser guide star cone beams
• Includes Tomographic and DM fitting error for 100
  subaps across

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PSF ensquared energy with and without tip/tilt
blur
Blurred by 15mas tip/tilt
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Can we use only one low-stroke MEMS DM and wrap
the phase? AO correction phase-wrapped at 2 x
center-wavelength of J band

• J band 1.238 /- 0.136 mm