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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 20, Iss. 9 — May. 1, 1981
  • pp: 1511–1515

Simple inversion technique to obtain cloud droplet size parameters using solar aureole data

Ting-i Wang, G. M. Lerfald, and V. E. Derr  »View Author Affiliations


Applied Optics, Vol. 20, Issue 9, pp. 1511-1515 (1981)
http://dx.doi.org/10.1364/AO.20.001511


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Abstract

A simple inversion technique in the single scattering regime has been developed to deduce cloud droplet size parameters by using the measurement of the radiance of near-forward scattered solar radiation as a function of angle. Compared with the numerical inversion technique that uses exact Mie scattering calculations, the new technique is much less time-consuming and hence should be usable in an on-line real time analysis. To test the effectiveness of the new technique, we use the results of polydispersed cloud size distribution calculated by Deirmendjian to retrieve the model size parameters. The agreement is excellent. We also generalize the theory to include the broadband source. A typical experimental example is given. Its comparison with time-consuming Mie scattering inversion technique again shows excellent agreement.

© 1981 Optical Society of America

History
Original Manuscript: November 14, 1980
Published: May 1, 1981

Citation
Ting-i Wang, G. M. Lerfald, and V. E. Derr, "Simple inversion technique to obtain cloud droplet size parameters using solar aureole data," Appl. Opt. 20, 1511-1515 (1981)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-20-9-1511


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References

  1. G. M. Lerfald, “A Solar Aureole Photometer for use in Measuring Size Distributions of Particles in the Atmosphere,” NOAA Tech. Memo. ERL WPL-36 (1977).
  2. J. R. Hodkinson, Appl. Opt. 5, 839 (1966). [CrossRef] [PubMed]
  3. D. Deirmendjian, “Use of Scattering Techniques in Cloud Micro-physics Research 1. The Aureole Method,” Rand Corp. report R-590-PR (1970).
  4. A. E. S. Green, A. Deepak, B. J. Lipofsky, Appl. Opt. 10, 1263 (1971). [CrossRef] [PubMed]
  5. M. J. Post, J. Opt. Soc. Am. 66, 483 (1976). [CrossRef]
  6. A. Deepak, “Inversion of Solar Aureole Measurements for Determining Aerosol Characteristics,” in Inversion Methods in Atmospheric Remote Sounding, A. Deepak, Ed., NASA-CP004 (U.S. GPO, Washington, D.C., 1977), Chap. 10, pp. 265–291.
  7. E. R. Westwater, A. Cohen, Appl. Opt. 12, 1340 (1973). [CrossRef] [PubMed]
  8. H. C. van de Hulst, Light Scattering by Small Particles (Wiley, New York, 1957).
  9. D. Deirmendjian, Electromagnetic Scattering on Spherical Polydispersions (Elsevier, New York, 1969).
  10. M. A. Box, A. Deepak, Appl. Opt. 17, 3794 (1978). [CrossRef] [PubMed]

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