Experimental confirmation of long-memory correlations in star-wander data

Luciano Zunino*, Damián Gulich, Gustavo Funes, Aziz Ziad

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


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.

Original languageEnglish
Pages (from-to)3718-3721
Number of pages4
JournalOptics Letters
Issue number13
StatePublished - 1 Jul 2014
Externally publishedYes


  • Probability theory, stochastic processes, and statistics
  • Atmospheric optics
  • Atmospheric propagation
  • Atmospheric turbulence
  • Wave-front sensing
  • Astronomical optics


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