2007/06/19 by Michael Goodwin, Charles Jenkins, Andrew Lambert
Engineering · Physics and Astronomy · #Adaptive optics #Adaptive optics and wavefront sensing #Advanced Optical Sensing Technologies #Altitude (triangle) #Atmospheric model #Atmospheric optics #Atmospheric turbulence #Diffuse sky radiation #Optical Wireless Communication Technologies #Sampling (signal processing) #Turbulence #astro-ph
paper · pdf · doi:10.1364/oe.15.014844
17 pages, 8 figures
arxiv created 2007/06/19 · openalex publication_date 2007/10/25 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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.