24hSHIMM: corrections and improving resolution of optical turbulence profiles

Ryan Griffiths; Florian Quatresooz; James Osborn; Richard Wilson

doi:10.1117/12.3031692

22 November 2024 24hSHIMM: corrections and improving resolution of optical turbulence profiles

Ryan Griffiths, Florian Quatresooz, James Osborn, Richard Wilson

Proceedings Volume 13194, Environmental Effects on Light Propagation and Adaptive Systems VII; 1319406 (2024) https://doi.org/10.1117/12.3031692
Event: Remote Sensing, 2024, Edinburgh, United Kingdom

Abstract

Characterisation of day and night atmospheric optical turbulence profiles is vital for validating turbulence forecasting tools and for site characterisation at optical ground stations. A scalable instrument providing accurate and detailed characterisation of optical turbulence conditions is therefore highly desirable. Recent advancements in real-time turbulence monitoring on the 24-hour Shack-Hartmann Image Motion Monitor (24hSHIMM) are discussed. The 24hSHIMM estimates the vertical profile of optical turbulence strength from observations of single stars in the short-wave-infrared. This talk will show how regularisation techniques can be employed on the 24hSHIMM to increase the accuracy of turbulence profiling and how non-zero exposure time and slow-moving, non-Kolmogorov conditions in the local environment can be corrected for. The feasibility of fitting an outer scale is also discussed. These techniques allow for a more complete and accurate characterisation of the optical turbulence which can be applied to any Shack-Hartmann system.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Ryan Griffiths, Florian Quatresooz, James Osborn, and Richard Wilson "24hSHIMM: corrections and improving resolution of optical turbulence profiles", Proc. SPIE 13194, Environmental Effects on Light Propagation and Adaptive Systems VII, 1319406 (22 November 2024); https://doi.org/10.1117/12.3031692

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KEYWORDS

Optical turbulence

Wavefront sensors

Profiling

Equipment

Atmospheric optics

Environmental monitoring

Turbulence

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