Improved detection of atmospheric turbulence with SLODAR

Details Improved detection of atmospheric turbulence with SLODAR Improved detection of atmospheric turbulence with SLODAR

2007-06-19

arxiv.org/abs/0706.2837v1

Astronomy and Astrophysics

Astrophysics

17 pages, 8 figures

Scientific paper

10.1364/OE.15.014844

We discuss several improvements in the detection of atmospheric turbulence using SLOpe Detection And Ranging (SLODAR). Frequently, SLODAR observations have shown strong ground-layer turbulence, which is beneficial to adaptive optics. We show that current methods which neglect atmospheric propagation effects can underestimate the strength of high altitude turbulence by up to ~ 30%. We show that mirror and dome seeing turbulence can be a significant fraction of measured ground-layer turbulence, some cases up to ~ 50%. We also demonstrate a novel technique to improve the nominal height resolution, by a factor of 3, called Generalized SLODAR. This can be applied when sampling high-altitude turbulence, where the nominal height resolution is the poorest, or for resolving details in the important ground-layer.

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