Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-08-28
Mon.Not.Roy.Astron.Soc.372:1483-1495,2006
Astronomy and Astrophysics
Astrophysics
16 pages including 13 figures. Accepted MNRAS (August 2006)
Scientific paper
10.1111/j.1365-2966.2006.10951.x
We describe a new method involving wavelet transforms for deriving the wind velocity associated with atmospheric turbulence layers from Generalized SCIDAR measurements. The algorithm analyses the cross-correlation of a series of scintillation patterns separated by lapses of Dt, 2Dt, 3Dt, 4Dt and 5Dt using wavelet transforms. Wavelet analysis provides the position, direction and altitude of the different turbulence layers detected in each cross-correlation. The comparison and consistency of the turbulent layer displacements in consecutive cross-correlations allow the determination of their velocities and avoid misidentifications associated with noise and/or overlapping layers. To validate the algorithm, we have compared the velocity of turbulence layers derived on four nights with the wind vertical profile provided by balloon measurements. The software is fully automated and is able to analyse huge amounts of Generalized SCIDAR measurements.
Fuensalida Jesus J.
Garcia-Lorenzo Begona
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