TY - GEN
T1 - Atmospheric turbulence profiling with a Shack-Hartmann wavefront sensor
AU - Ogane, Hajime
AU - Akiyama, Masayuki
AU - Oya, Shin
AU - Ono, Yoshito
N1 - Publisher Copyright:
© 2020 SPIE.
Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2020
Y1 - 2020
N2 - In order to measure the altitude profile of the atmospheric turbulence in real-time, we are applying a MASSDIMM method (Multi Aperture Scintillation Sensor and Differential Image Motion Monitor) to the ShackHartmann wavefront sensor data. Tomographic estimation of the atmospheric turbulence is a key technique in new generation of adaptive optics systems with multiple guide stars, and the real-time turbulence profiling provide a useful prior information for the tomography, which is an ill-posed inverse problem. By using the data of a Shack-Hartmann sensor, a turbulence profile in the same direction as the AO correction can be acquired. Moreover, since more information can be used compared with the traditional MASS-DIMM, the resolution in the height direction can be increased. This time, the data of the Shack-Hartmann sensor attached to Tohoku University 50cm telescope was analyzed, and the estimation of the turbulence profile was obtained. Similar profiles were obtained while the elevation of the star and the apparent distance to the turbulence changed in one hour monitoring measurements. The results supported the validity of the method.
AB - In order to measure the altitude profile of the atmospheric turbulence in real-time, we are applying a MASSDIMM method (Multi Aperture Scintillation Sensor and Differential Image Motion Monitor) to the ShackHartmann wavefront sensor data. Tomographic estimation of the atmospheric turbulence is a key technique in new generation of adaptive optics systems with multiple guide stars, and the real-time turbulence profiling provide a useful prior information for the tomography, which is an ill-posed inverse problem. By using the data of a Shack-Hartmann sensor, a turbulence profile in the same direction as the AO correction can be acquired. Moreover, since more information can be used compared with the traditional MASS-DIMM, the resolution in the height direction can be increased. This time, the data of the Shack-Hartmann sensor attached to Tohoku University 50cm telescope was analyzed, and the estimation of the turbulence profile was obtained. Similar profiles were obtained while the elevation of the star and the apparent distance to the turbulence changed in one hour monitoring measurements. The results supported the validity of the method.
KW - Adaptive optics
KW - Atmospheric turbulence
KW - Scintillation
KW - Shack-Hartmann wavefront sensor
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U2 - 10.1117/12.2562320
DO - 10.1117/12.2562320
M3 - Conference contribution
AN - SCOPUS:85100005433
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Adaptive Optics Systems VII
A2 - Schreiber, Laura
A2 - Schmidt, Dirk
A2 - Vernet, Elise
PB - SPIE
T2 - Adaptive Optics Systems VII 2020
Y2 - 14 December 2020 through 22 December 2020
ER -