Differential-tilt technique for saturation-resistant profiling of atmospheric turbulence

Matthew R. Whiteley; Donald C. Washburn; Lawrence A. Wright

doi:10.1117/12.454795

4 February 2002 Differential-tilt technique for saturation-resistant profiling of atmospheric turbulence

Matthew R. Whiteley, Donald C. Washburn, Lawrence A. Wright

Proceedings Volume 4494, Adaptive Optics Systems and Technology II; (2002) https://doi.org/10.1117/12.454795
Event: International Symposium on Optical Science and Technology, 2001, San Diego, CA, United States

Abstract

A technique for profiling of C_n² over an atmospheric propagation path is proposed, developed and analyzed. The technique employs differential-tilt measurements to arrive at statistics which have unique weighting functions over the propagation path. These weighting functions are computed theoretically and used to derive a reconstructor matrix for C_n² values throughout the path to be applied to an appropriate set of differential-tilt statistics. A candidate optical system is presented, and the performance of the profile reconstructor is analyzed. This study indicates that the relative error in the C_n² estimates is approximately 5%. The relative error in estimating key atmospheric parameters such as the Fried parameter, isoplanatic angle, and the Rytov parameter from the reconstructed profiles is approximately 3%.

Citation Download Citation

Matthew R. Whiteley, Donald C. Washburn, and Lawrence A. Wright "Differential-tilt technique for saturation-resistant profiling of atmospheric turbulence", Proc. SPIE 4494, Adaptive Optics Systems and Technology II, (4 February 2002); https://doi.org/10.1117/12.454795

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