Optical methods for determining the microstructure of a dispersed medium provide sufficient speed and accuracy of monitoring its parameters, without any changes in the volume of the sensing medium. However, the phenomenon of multiple scattering has a significant effect on the characteristics of the lidar return in the study of media with large optical dense. In this work we discuss the principles of the device for determining the microstructure of a scattering medium, based on the separation of the backscattered intensity from the total flux of scattered radiation. Also we present the result of the experiments.
In this paper the results of the study of the polarization characteristics of double scattering lidar return from drip clouds presents. We calculated the distribution of the intensity of the radiation scattered by cloud and detected by CCDcamera at sensing circularly and linearly polarized radiation. CCD-camera setting in the receiving system lidar.
Interpretation of lidar data most often carried out using the lidar equation, but it limited small optical depth. However the multiple scattering in the clouds and dense haze significant impact on value and the polarization state of lidar return. Results of the calculation of polarization characteristics of double scattering lidar return from marine and continental clouds with different liquid water content using circularly and linearly polarized sensing radiation and multiple field of view lidar are discussed in this paper.
The paper discusses results of a numerical modeling of distribution of the intensity of double scattering lidar signal in the detection plane at different states of polarization of the probe radiation. We have found that the ratio of the degrees of polarization of the of the double scattering signal when probed with circularly and linearly polarized radiation is independent of the angle of view lidar receiving system. Shown that the dependence of this ratio on of the water content of clouds is linear.
Special features in the formation of signal of double scattering depending on the field-of-view angle of the lidar receiving system and the depth of sensing of droplet clouds of various microstructures are investigated.
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