31 January 2001 Atmospheric propagation model for calculation of the aureole about a point source
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Abstract
In the atmosphere, light scattering by molecules, particulates and aerosols causes an aureole around point- like sources. In various meteorological conditions, the radiance field coming from this aureole can be a non- negligible part of the total detected signal by large Field Of View sensors. In the framework of aureole's study, we have developed a method based on Monte Carlo calculation. The corresponding code permits to deal with monochromatic point sources in the 240 to 300 nm spectral range. The source's intensity angular dependency is axisymmetric and the atmosphere is described as a plane-parallel medium composed of a user defined constituents profiles. Systematic tests have been performed in order to evaluate the influence of the different input data on aureole results, such as ozone and SO2 concentration values or ozone and aerosols concentration profiles. These computations will help us to define the set of meteorological parameters which need to e known accurately in order to compare computations with detected signals recorded during field experiments.
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Claire Lavigne, Claire Lavigne, Patrick Chervet, Patrick Chervet, Stephane Langlois, Stephane Langlois, Antoine Roblin, Antoine Roblin, "Atmospheric propagation model for calculation of the aureole about a point source", Proc. SPIE 4167, Atmospheric Propagation, Adaptive Systems, and Laser Radar Technology for Remote Sensing, (31 January 2001); doi: 10.1117/12.413840; https://doi.org/10.1117/12.413840
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