The aim of this research is to measure the electromagnetic radiation scattering properties of the atmosphere and to compare the experimental results with a Monte Carlo type model. The radiation scattered by suspended particles, known as aerosols, is the topic of interest. The presence of aerosols between a point source and an observation system causes the formation of a corona around the point source. The intensity of this corona is the Point Spread Function (PSF). A comparison is presented between the measured atmospheric PSF (caused by scattering) and the PSF which is calculated using a Monte Carlo calculation. While in previous studies the maximum path length was 600 meters, in the present research the path length was increased to 2000 meters. The spectral range was extended from the visible to 3.6 μm in the infrared. The authors used a collimated black body source for illumination and an IR radiometer as an observation system. The conclusion from the experimental results is that an increase of the beam divergence causes an increase in the scattered light received, as predicted by the model.
|Number of pages||9|
|Journal||Proceedings of SPIE - The International Society for Optical Engineering|
|State||Published - 1999|
|Event||Proceedings of the 1999 Propagation and Imaging through the Atmosphere III - Denver, CO, USA|
Duration: 22 Jul 1999 → 23 Jul 1999