The Effects That Lead To the Degradation of the Images Obtained Using a Ground-Based Telescope

Authors

  • Youness Bentahar  Department of Physics, University Hassan II Casablanca, Morocco
  • Mohamed AFIFI  Department of Physics, University Hassan II Casablanca, Morocco
  • Hanane Dalimi  Department of Physics, University Hassan II Casablanca, Morocco
  • Said Amar  Department of Physics, University Hassan II Casablanca, Morocco

Keywords:

Deconvolutio, Covariance of the Angles of Arrival, Optics Atmospheric, Astronomical Image

Abstract

Various methods of deconvolution have been developed for several decades, especially in astronomy. The extension of these techniques to the case of a spatially varying blur is currently an open problem. Numerical models to improve the resolution (deconvolution methods). The objective of this article is to obtain an estimate of the different consistency parameters of wave fronts through a statistical analysis as the variance and covariance of the angles of arrival.

References

  1. M. Lemaitre, "Etude de la turbulence atmosphérique en vision horizontale lointaine et restauration de séqueances dégradées dans le visible et l'infrarouge" these doctorat(2007).
  2. P. Mège, "interférométrie avce des guides d'ondes optiques", Théorie et applications. These de doctorat (2002).
  3. J. Borgnino, "Estimation of the Spatial Coherence Outer Scale Relevant to Long Baseline Interferometry and maging in Optical Astronomy," Applied Optics 29, 1863_1865, 1990.
  4. THIÉBAUT, Éric, DÉNIS, Loïc, SOULEZ, Ferréol, et al. Spatially variant PSF modeling and image deblurring. In: SPIE Astronomical Telescopes+ Instrumentation. International Society for Optics and Photonics, 2016. p. 99097N-99097N-10.
  5. J. Maire, "Modélisation des effets optiques de la turbulence atmosphérique pour les grands télescopes et les observations à Haute Résolution Angulaire," PhD Thesis, Université de Nice- Sophia Antipolis, 2007.
  6. J. Borgnino, "Etude de la dégradation des images astronomiques diurnes par analyse statistique des fluctuations d'angles d'arrivée", thèse de doctorat (1978).
  7. T. Sadibekova,"contribution à l'etude des sites astronomique par modélisation et expérimentation in situ : Application aux sites de la silla et du dome C pour les telescopes geants du futur» Université de Nice-Sophia Antipolis, (2007).
  8. A.Ziad "estimation des échelles limites de cohérence spatiale des fronts d'onde et optimisation des observations à haute résolution angulaire en astronomie", thèse de doctorat (octobre 1993).
  9. F. Roddier, "Effects of Atmospheric Turbulence in Optical Astronomy," Progress in Optics 19, E. Wolf Ed, 281_376, 1981.
  10. C. Petit "Etude de la commande optimale en OA et OAMC, validation numérique et expérimentale",these de doctorat Paris(2006).
  11. W. Dali Ali, "Etude de la dégradation par la turbulence atmosphérique des images du bord solaire : estimation du paramètre de Fried," Mémoire de Magister, USTHB, 2007.
  12. B. Le Roux, "commande optimale en optique adaptative classique et multiconjuguée", these de doctorat Nice (2003).
  13. J. Borgnino, "Estimation of the Spatial Coherence Outer Scale Relevant to Long Baseline Interferometry and Imaging in Optical Astronomy," Applied Optics 29, 1863_1865, 1990.
  14. J. Borgnino, F. Martin & A. Ziad, "E_ect of a Finite Spatial-Coherence Outer Scale on the Covariances of Angle-of-Arrival Fluctuations," Optics Communications 91, 267_269, 1992.
  15. R. Avila., A.Ziad., J.Borgnino., A.Agabi . and A.Tokovinin ”Theoretical spatiotemporal analysis of angle-of-arrival induced by atmospheric turbulence as observed with the grating scale monitor experiment “, J. Opt. Am. A / Vol. 14,N11, (1997).
  16. A. Berdja, "Effets de la Turbulence Atmosphérique lors de l'observation du soleil à Haute Résolution Angulaire", thèse de doctorat(2007).
  17. CHEN, Xiaoting, LU, Changhua, LIU, Wenqing, et al. A “New Algorithm for Calculating the Daytime Visibility Based on the Color Digital Camera”, IJCSI International Journal of Computer Science Issues, Vol. 10, Issue 1, No 1, January 2013.

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Published

2017-04-30

Issue

Section

Research Articles

How to Cite

[1]
Youness Bentahar, Mohamed AFIFI, Hanane Dalimi, Said Amar, " The Effects That Lead To the Degradation of the Images Obtained Using a Ground-Based Telescope, International Journal of Scientific Research in Science and Technology(IJSRST), Online ISSN : 2395-602X, Print ISSN : 2395-6011, Volume 3, Issue 3, pp.347-351, March-April-2017.