|
|
 |
|
Abstract Review
| Corresponding Author |
|
|
|
| Authors |
| Name | | Affiliation |
|
Marc Sarazin |
|
ESO |
|
Alain Smette |
|
ESO |
|
|
| Abstract |
| Session | | 3 (Approaches for modeling atmospheric optical turbulence.) |
| Title | | 'Testing turbulence model at metric scales with mid-infrared VISIR
' |
| Abstract | | The wave-front coherence length r_0 reaches metric values at
mid-infrared wavelengths, hence long-exposure images can probe the
large-scale spatial structure of turbulence directly in a
model-independent way. We obtained simultaneous mid-IR and optical
images of a point source at the VLT using the VISIR instrument and the
Shack-Hartmann sensor. The analysis shows that the departure of the
phase structure function from a pure Kolmogorov model is very strong
and can be adequately represented by the von Karman model with
decametric outer scale. Various instrumental effects influencing the
results are discussed.
|
|
Return to Program and Events
|
|
|
|
