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- W1978205401 abstract "An on-line estimation of turbulence parameters (<i>r</i><sub>0</sub>, <i>L</i><sub>0</sub> and wind speed) and Adaptive Optics (AO) performance using NAOS [Nasmyth Adaptive Optics System] is presented. The method is based on the reconstruction of open-loop data from deformable mirror voltages and residual wavefront sensor slopes obtained in closed loop. This dedicated tool implemented in the real time computer of the NAOS system (first AO of the Very Large Telescope) allows without any loop opening to automatically monitor and display (every 15 seconds) both the atmospheric conditions and the system performance. We have validated the algorithm and tested its robustness on simulated and experimental data (both in laboratory and on sky). Using data obtained during more than two years of operations, statistical study on NAOS performance and turbulence characteristics are proposed. An on-line estimation of turbulence parameters (<i>r</i><sub>0</sub>, <i>L</i><sub>0</sub> and wind speed) and Adaptive Optics (AO) performance is presented." @default.
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- W1978205401 date "2004-10-25" @default.
- W1978205401 modified "2023-09-25" @default.
- W1978205401 title "NAOS performance characterization and turbulence parameters estimation using closed-loop data" @default.
- W1978205401 doi "https://doi.org/10.1117/12.563009" @default.
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