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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 20, Iss. 18 — Sep. 15, 1981
  • pp: 3227–3232

Scintillation at two optical frequencies

W. B. Hubbard and H. J. Reitsema  »View Author Affiliations


Applied Optics, Vol. 20, Issue 18, pp. 3227-3232 (1981)
http://dx.doi.org/10.1364/AO.20.003227


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Abstract

Stellar scintillation data were obtained on a single night at a variety of zenith distances and azimuths, using a photon-counting photometer recording at 100 Hz simultaneously at wavelengths of 0.475 μm and 0.870 μm. Orientable apertures of 42-cm diam separated by 1 m were used to establish the average upper atmosphere wind direction and velocity. Dispersion in the earth’s atmosphere separate the average optical paths at the two wavelengths, permitting a reconstruction of the spatial cross-correlation function for scintillations, independent of assumptions about differential fluid motions. Although there is clear evidence of a complicated velocity field, scintillation power was predominantly produced by levels at pressures of 130 ± 30 mbar. The data are not grossly inconsistent with layers of isotropic Kolmogorov turbulence, but there is some evidence for deviation from the Kolmogorov spectral index and/or anisotropy.

© 1981 Optical Society of America

History
Original Manuscript: March 7, 1981
Published: September 15, 1981

Citation
W. B. Hubbard and H. J. Reitsema, "Scintillation at two optical frequencies," Appl. Opt. 20, 3227-3232 (1981)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-20-18-3227


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References

  1. V. I. Tatarski, Wave Propagation in a Turbulent Medium (Dover, New York, 1967), p. 169.
  2. V. I. Tatarski, The Effects of the Turbulent Atmosphere on Wave Propagation (Israel Program of Scientific Translations, Jerusalem, 1971), p. 235.
  3. A. T. Young, Appl. Opt. 8, 869 (1969). [CrossRef] [PubMed]
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  6. G. D. Garland, Introduction to Geophysics (W. B. Saunders, Philadelphia, 1971), p. 39.
  7. W. B. Hubbard, J. R. Jokipii, B. A. Wilking, Icarus 34, 374 (1978). [CrossRef]
  8. J. T. Houghton, The Physics of Atmospheres (Cambridge U. P., London, 1977), p. 164.
  9. L. C. Lee, J. R. Jokipii, Astrophys. J. 202, 439 (1975). [CrossRef]

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