Profiling atmospheric turbulence along a slant path using LEDs and a camera bank

Santasri Bose-Pillai; Benjamin Wilson; Jonathan Krone; Jack McCrae; Steven Fiorino

doi:10.1117/12.2595009

1 August 2021 Profiling atmospheric turbulence along a slant path using LEDs and a camera bank

Santasri Bose-Pillai, Benjamin Wilson, Jonathan Krone, Jack McCrae, Steven Fiorino

Proceedings Volume 11836, Unconventional Imaging and Adaptive Optics 2021; 1183601 (2021) https://doi.org/10.1117/12.2595009
Event: SPIE Optical Engineering + Applications, 2021, San Diego, California, United States

Abstract

Understanding how atmospheric turbulence is distributed along a path helps in effective turbulence compensation and mitigation. Phase-based techniques to measure turbulence have potential advantages when used over long ranges since they do not suffer from saturation issues as the irradiance-based techniques. In an earlier work, we had demonstrated a method to extract turbulence information along a path using the time-lapse imagery of a LED array from a pair of spatially separated cameras. By measuring the differential motion of pairs of LEDs of varying separations, sensed by a single camera or between cameras, turbulence profiles could be obtained. However, by using just a pair of cameras, the entire path could not be profiled. By using multiple spatially separated cameras, improvements can be made on the profiling resolution as well as the fraction of the path over which profiling is possible. This idea has been demonstrated in the present work by using a camera bank comprising of 5 identical cameras, looking at an arrangement of 10 nonuniformly spaced LEDs over a slant path. The differential tilt variances measured at a single camera and between all pairs of cameras have been used to obtain turbulence information. Profiling thus with elevated targets will ultimately help in a better understanding of how turbulence varies with altitude in the surface layer.

Conference Presentation

Citation Download Citation

Santasri Bose-Pillai, Benjamin Wilson, Jonathan Krone, Jack McCrae, and Steven Fiorino "Profiling atmospheric turbulence along a slant path using LEDs and a camera bank", Proc. SPIE 11836, Unconventional Imaging and Adaptive Optics 2021, 1183601 (1 August 2021); https://doi.org/10.1117/12.2595009

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available