Characterizing atmospheric turbulence over Maunakea through temporal tomography

Ryan Dungee; Mark Chun

doi:10.1117/12.2628413

29 August 2022 Characterizing atmospheric turbulence over Maunakea through temporal tomography

Ryan Dungee, Mark Chun

Proceedings Volume 12185, Adaptive Optics Systems VIII; 121851P (2022) https://doi.org/10.1117/12.2628413
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Abstract

Early adaptive optics (AO) systems were designed with knowledge of a site’s distribution of Fried parameter (r0) and Greenwood time delay (τ0) values. Recent systems have leveraged additional knowledge of the distribution of turbulence with altitude. We present measurements of the atmosphere above Maunakea, Hawaii and how the temporal properties of the turbulence relate to tomographic reconstructions. We combine archival telemetry collected by ‘imaka—a ground layer AO (GLAO) system on the UH88” telescope—with data from the local weather towers, weather forecasting models, and weather balloon launches, to study how frequently one can map a turbulent layer’s wind vector to its altitude. Finally, we present the initial results of designing a new GLAO control system based off of these results, an approach we have named “temporal tomography.”

Conference Presentation

Citation Download Citation

Ryan Dungee and Mark Chun "Characterizing atmospheric turbulence over Maunakea through temporal tomography", Proc. SPIE 12185, Adaptive Optics Systems VIII, 121851P (29 August 2022); https://doi.org/10.1117/12.2628413

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