ESTIMATION OF CLOUD DROPLET SIZE DENSITY DISTRIBUTION FROM MULTIPLE FIELD-OF-VIEW LIDAR RETURNS

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Authors
  1. Roy, G.
  2. Bissonnette, L.R.
  3. Bastille, C.
  4. Vallee, G.
Corporate Authors
Defence Research Establishment Valcartier, Valcartier QUE (CAN)
Abstract
A simple model based on diffraction and geometrical optics relates the field-of-view dependent lidar signal returns from clouds to the size density distribution. The relation is written in a matrix form. The apparent size density distribution is obtained via matrix inversion with a constraint technique. The perturbation caused by geometrical optics is interpreted in terms of small-particle diffraction. The apparent size density distribution is corrected for multiple scattering a posteriori. The correction is established by calculating the relative contribution of the different scattering orders to the broadening of the scattering phase function. The validity of the model is supported by Monte Carlo simulations and by experimental data obtained under controlled conditions. Finally, the inversion technique is applied to multiple-field-of-view (MFOV) lidar measurements from real clouds.
Keywords
Multiple field of view (MFOV)
Report Number
DREV-9705 —
Date of publication
01 Sep 1997
Number of Pages
45
DSTKIM No
98-00148
CANDIS No
506813
Format(s):
Hardcopy;Document Image stored on Optical Disk

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