15 December 1995 Atmospheric scintillations for measuring remote wavefronts
Author Affiliations +
Abstract
Stellar scintillations provide statistical information about the higher atmosphere (7 - 12 km). Since each realization of scintillation is the Fresnel diffraction off high altitude turbulence, it can be inverted separately. Sensors for adaptive optics integrate the wave front error over all layers of turbulence. They measure scintillation for calibration. But this discarded information yields the high wave fronts. Separate correction for low and/or high turbulence widens the repaired field of view. The method requires that the reference star is bright and small, that the middle turbulence (2 - 7 km) is negligible, and that the sensor has good spatio-temporal resolution. Simulations show that the turbulence can be retrieved, with lowest and highest frequencies lost first.
© (1995) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Erez N. Ribak, "Atmospheric scintillations for measuring remote wavefronts", Proc. SPIE 2580, Optics in Atmospheric Propagation and Adaptive Systems, (15 December 1995); doi: 10.1117/12.228480; https://doi.org/10.1117/12.228480
PROCEEDINGS
7 PAGES


SHARE
RELATED CONTENT

Dome-seeing subtraction from G-SCIDAR measurements
Proceedings of SPIE (October 29 2007)
Measuring turbulence in an extended field of view
Proceedings of SPIE (January 31 2001)
Single star SCIDAR for Cn2(h) profiling
Proceedings of SPIE (August 18 2005)
Measurements of the beam wave fluctuations over a 142 km...
Proceedings of SPIE (September 01 2006)

Back to Top