Near ground horizontal high resolution C n 2 profiling from Shack–Hartmann slopeand scintillation data
Language
en
Article de revue
This item was published in
Applied optics. 2021-12-01, vol. 60, n° 34, p. 10499-10519
Optical Society of America
English Abstract
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 ...Read more >
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.Read less <
English Keywords
Atmospheric turbulence
Boundary Layer
Wave propagation
Inverse problems
Astronomical optics
Optical sensing and sensors
Origin
Hal imported