SAUVAGE, Chloé; ROBERT, Clélia; MUGNIER, Laurent; CONAN, Jean-Marc; COHARD, Jean-Martial; NGUYEN, Khanh Linh; IRVINE, Mark; LAGOUARDE, Jean-Pierre

doi:10.1364/AO.438170

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SAUVAGE, Chloé
DOTA, ONERA, Université Paris Saclay [Châtillon]

ROBERT, Clélia
DOTA, ONERA, Université Paris Saclay [Châtillon]

MUGNIER, Laurent
DOTA, ONERA, Université Paris Saclay [Châtillon]

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Applied optics. 2021-12-01, vol. 60, n° 34, p. 10499-10519

Optical Society of America

Résumé en anglais

Coupled slope and scintillation detection and ranging (CO-SLIDAR) is a very promising technique for the metrology of near ground C-n(2) profiles. It exploits both phase and scintillation measurements obtained with a dedicated wavefront sensor and allows profiling on the full line of sight between pupil and sources. This technique is applied to an associated instrument based on a mid-IR Shack-Hartmann wavefront sensor coupled to a 0.35 m telescope, which observes two cooperative sources. This paper presents what we believe is the first comprehensive description of the CO-SLIDAR method in the context of near-ground optical turbulence metrology. It includes the presentation of the physics principles underlying the measurements of our unsupervised C-n(2) profile reconstruction strategy together with the error bar estimation on the reconstructed values. The application to data acquired in a heterogeneous rural landscape during an experimental campaign in Lannemezan, France, demonstrates the ability to obtain profiles with a sampling pitch of about 220 m over a 2.7 km line of sight. The retrieved C-n(2) profiles are presented and their variability in space and time is discussed.< Réduire

Mots clés en anglais

Atmospheric turbulence

Boundary Layer

Wave propagation

Inverse problems

Astronomical optics

Optical sensing and sensors

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Near ground horizontal high resolution C n 2 profiling from Shack–Hartmann slopeand scintillation data

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