Artículos de revistas
Experimental confirmation of long-memory correlations in star-wander data
Fecha
2014-07Registro en:
Gulich, Maximiliano Damián; Funes, Gustavo Luis; Ziad, Aziz; Zunino, Luciano José; Experimental confirmation of long-memory correlations in star-wander data; Optical Society of America; Optics Letters; 39; 13; 7-2014; 3718-3721
0146-9592
CONICET Digital
CONICET
Autor
Zunino, Luciano José
Gulich, Maximiliano Damián
Funes, Gustavo Luis
Ziad, Aziz
Resumen
In this letter we have analyzed the temporal correlations of the angle-of-arrival fluctuations of stellar images. Experimentally measured data were carefully examined by implementing multifractal detrended fluctuation analysis. This algorithm is able to discriminate the presence of fractal and multifractal structures in recorded time sequences. We have confirmed that turbulence-degraded stellar wavefronts are compatible with a long-memory correlated monofractal process. This experimental result is quite significant for the accurate comprehension and modeling of the atmospheric turbulence effects on the stellar images. It can also be of great utility within the adaptive optics field.