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Experimental verification of the frozen flow atmospheric turbulence assumption with use of astronomical adaptive optics telemetry
- Source :
- Journal of the Optical Society of America. A, Optics, image science, and vision. 26(4)
- Publication Year :
- 2009
-
Abstract
- We use closed-loop deformable mirror telemetry from Altair and Keck adaptive optics (AO) to determine whether atmospheric turbulence follows the frozen flow hypothesis. Using telemetry from AO systems, our algorithms (based on the predictive Fourier control framework) detect frozen flow >94% of the time. Usually one to three layers are detected. Between 20% and 40% of the total controllable phase power is due to frozen flow. Velocity vector RMS variability is less than 0.5 m/s (per axis) on 10-s intervals, indicating that the atmosphere is stable enough for predictive control to measure and adapt to prevailing atmospheric conditions before they change.
- Subjects :
- Physics
business.industry
Turbulence
Spectral density
Atomic and Molecular Physics, and Optics
Deformable mirror
Electronic, Optical and Magnetic Materials
Optics
Flow (mathematics)
Telemetry
Computer Vision and Pattern Recognition
Altair
business
Adaptive optics
Atmospheric optics
Remote sensing
Subjects
Details
- ISSN :
- 10847529
- Volume :
- 26
- Issue :
- 4
- Database :
- OpenAIRE
- Journal :
- Journal of the Optical Society of America. A, Optics, image science, and vision
- Accession number :
- edsair.doi.dedup.....f1d39de8e787fac6525d2b321f4435ad