CO-SLIDAR is a very promising technique for the metrology of near ground Cn2 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 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 Cn2 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 Cn2 profiles are presented and their variability in space and time is discussed.
@article{arxiv.2111.08003,
title = {Near ground horizontal high resolution $C_n^2$ profiling from Shack-Hartmann slope and scintillation data},
author = {Chloé Sauvage and Clélia Robert and Laurent M. Mugnier and Jean-Marc Conan and Jean-Martial Cohard and Khanh Linh Nguyen and Mark Irvine and Jean-Pierre Lagouarde},
journal= {arXiv preprint arXiv:2111.08003},
year = {2021}
}