Wind loading on the primary mirror

• Outline of the problem
• Wind tunnel tests with the telescope exposed
• Tests with the 3.5-m mirror dummy
  • Measurements
  • Main results
  • Relationship between pressure fluctuations and wavefront aberrations
• Wind tunnel measurements of the pressure/velocity field on the mirror
  • Measurements
  • Pressure-speed correlation
  • Correction of wind deformations by active optics systems
• Synthesis