Interaction of Electromagnetic Signals with Particulate Clouds
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH
Pagination or Media Count:
A particulate cloud affects the ability of an electronic detector to receive an electromagnetic signal in two ways be scattering light from the sun into the detector, thereby masking the signal, and by attenuating the signal itself. These effects are well studied in the Mie theory, which is summarized. The effect of the particle distribution in the cloud and the shape of the cloud on scattering and absorption problems is then analyzed. The results of this analysis and of the Mie theory are incorporated into a computer program which is included in the appendix. The graphs generated with the program can be used in conjunction with information about the sunlight intensity and the detectors discriminating ability to determine the effect of scattered light on the detection of the signal. We conclude the attenuation of the signal plays a relatively minor role in the ability of a detector to receive a signal affected by a cloud of particles.
- Radiofrequency Wave Propagation