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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 45, Iss. 22 — Aug. 1, 2006
  • pp: 5521–5531

Polarization-discrimination technique to maximize the lidar signal-to-noise ratio for daylight operations

Yasser Y. Hassebo, Barry Gross, Min Oo, Fred Moshary, and Samir Ahmed  »View Author Affiliations


Applied Optics, Vol. 45, Issue 22, pp. 5521-5531 (2006)
http://dx.doi.org/10.1364/AO.45.005521


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Abstract

The impact and potential of a polarization-selection technique to reduce the sky background signal for linearly polarized monostatic elastic backscatter lidar measurements are examined. Taking advantage of naturally occurring polarization properties in scattered skylight, we devised a polarization-discrimination technique in which both the lidar transmitter and the receiver track and minimize detected sky background noise while maintaining maximum lidar signal throughput. Lidar elastic backscatter measurements, carried out continuously during daylight hours at 532   nm , show as much as a factor of 10 improvement in the signal-to-noise ratio (SNR) over conventional unpolarized schemes. For vertically pointing lidars, the largest improvements are limited to the early morning and late afternoon hours, while for lidars scanning azimuthally and in elevation at angles other than vertical, significant improvements are achievable over more extended time periods with the specific times and improvement factors depending on the specific angle between the lidar and the solar axes. The resulting diurnal variations in SNR improvement sometimes show an asymmetry with the solar angle that analysis indicates can be attributed to changes in observed relative humidity that modifies the underlying aerosol microphysics and observed optical depth.

© 2006 Optical Society of America

OCIS Codes
(010.3640) Atmospheric and oceanic optics : Lidar
(280.0280) Remote sensing and sensors : Remote sensing and sensors
(280.1100) Remote sensing and sensors : Aerosol detection
(280.3640) Remote sensing and sensors : Lidar

ToC Category:
System Modeling and Optimization

History
Original Manuscript: November 4, 2005
Revised Manuscript: April 20, 2006
Manuscript Accepted: April 26, 2006

Citation
Yasser Y. Hassebo, Barry Gross, Min Oo, Fred Moshary, and Samir Ahmed, "Polarization-discrimination technique to maximize the lidar signal-to-noise ratio for daylight operations," Appl. Opt. 45, 5521-5531 (2006)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-45-22-5521


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References

  1. R. M. Schotland, K. Sassen, and R. J. Stone, "Observations by lidar of linear depolarization ratios by hydrometeors," J. Appl. Meteorol. 10, 1011-1017 (1971). [CrossRef]
  2. K. Sassen, "Depolarization of laser light backscattered by artificial clouds," J. Appl. Meterol. 13, 923-933 (1974). [CrossRef]
  3. C. M. R. Platt, "Lidar observation of a mixed-phase altostratus cloud," J. Appl. Meteorol. 16, 339-345 (1977). [CrossRef]
  4. K. Sassen, "Scattering of polarized laser light by water droplet, mixed-phase and ice crystal clouds. 2. Angular depolarization and multiple scatter behavior," J. Atmos. Sci. 36, 852-861 (1979). [CrossRef]
  5. C. M. R. Platt, "Transmission and reflectivity of ice clouds by active probing," in Clouds, Their Formation, Optical Properties, and Effects, P. V. Hobbs, ed. (Academic, 1981), pp. 407-436.
  6. D. S. Kokkinos and S. A. Ahmed, "Atmospheric depolarization of lidar backscatter signals," in Lasers '88: Proceedings of the International Conference, Lake Tahoe, Nevada, Paper No. A90-30956 12-36. (STS Press, McLean, Virginia, 1989), pp. 538-545.
  7. G. P. Gobbi, "Polarization lidar returns from aerosols and thin clouds: a framework for the analysis," Appl. Opt. 37, 5505-5508 (1998). [CrossRef]
  8. N. Roy, G. Roy, L. R. Bissonnette, and J. Simard, "Measurement of the azimuthal dependence of cross-polarized lidar returns and its relation to optical depth," Appl. Opt. 43, 2777-2785 (2004). [CrossRef] [PubMed]
  9. J. Hansen and L. Travis, "Light scattering in planetery atmospheres," Space Sci. Rev. 16, 527-610 (1974). [CrossRef]
  10. Y. Y. Hassebo, B. Gross, F. Moshary, Y. Zhao, and S. Ahmed, "Polarization discrimination technique to maximize lidar signal-to-noise ratio," in Polarization Science and Remote Sensing II, J. A. Shaw and J. S. Tyo, eds., Proc. SPIE 5888, 93-101 (2005).
  11. Y. Y. Hassebo, B. M. Gross, M. M. Oo, F. Moshary, and S. A. Ahmed, "Impact on lidar system parameters of polarization selection/tracking scheme to reduce daylight noise," in Lidar Technologies, Techniques, and Measurements for Atmospheric Remote Sensing, U. N. Singh, ed., Proc. SPIE 5984, 53-64 (2005).
  12. NOAA-CREST, http://www.fsl.noaa.gov.
  13. M. V. Klein, Optics (Wiley, 1970).
  14. R. M. Measures, Laser Remote Sensing (Wiley, 1984).
  15. K. N. Liou, An Introduction to Atmospheric Radiation (Academic, 2002).
  16. G. Hanel, "The properties of atmospheric aerosol particles as functions of the relative humidity at thermodynamic equilibrium with the surrounding moist air," in Advances in Geophysics, H. E. Landsberg and J. Van Mieghem, eds. (Academic, 1976), Vol. 19, pp. 73-188.
  17. P. V. N. Nair and K. G. Vohra, "Growth of aqueous sulfuric acid droplets as function of relative humidity," J. Aerosol Sci. 6, 265-271 (1975). [CrossRef]
  18. G. Hanel and M. Lehmann, "Equilibrium size of aerosol particles and relative humidity: new experimental data from various aerosol types and their treatment for cloud physics application," Contrib. Atmos. Phys. 54, 57-71 (1981).
  19. B. Yan, K. Stamnes, W. Li, B. Chen, J. J. Stamnes, and S.-C. Tsay, "Pitfalls in atmospheric correction of ocean color imagery: how should aerosol optical properties be computed?" Appl. Opt. 41, 412-423 (2002). [CrossRef] [PubMed]
  20. E. P. Shettle and R. W. Fenn, Models of the Aerosols of the Lower Atmosphere and the Effects of Humidity Variations on Their Optical Properties, Project 7670 (Air Force Geophysics Laboratory, Massachusetts, 1979).
  21. U.S. Naval Observatory Astronomical Applications, http://aa.usno.navy.mil/data/docs/AltAz.html.
  22. J. Chowdhary, B. Cairns, and L. D. Travis, "The contribution of the water leaving radiances to multiangle, multispectral polarimetric observations over the open ocean: bio-optical model results for Case I waters," special issue, "Polarization imaging and remote sensing," Appl. Opt. 45, 5542-5567 (2006). [CrossRef] [PubMed]

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