Atmospheric Transmission Modeling:Proposed Aerosol Methodology with Application to the Grafenwoehr Atmospheric Optics Data Base.

摘要

Using Mie calculations for a wide variety of measured and assumed particle size distributions, a strong relationship between the total volume content of the particulate along the transmission path and the aerosol extinction coefficient was established. Field measurements, such as those taken at Grafenwoehr, Federal Republic of Germany, further established the validity of this relationship. Both theory and experiment suggest that a phenomenological scaling of photopic transmission (related to normal meteorological visibility) to the infrared (IR) windows is possible which furthermore is independent of the structure or shape of the particle size distribution. A second important implication is that a simple, possibly remote measurement of a quantity related to the volume or mass of the aerosol could provide a direct measure of the IR transmission (an IR visibility meter). Such a routine meteorological measurement would clearly be of use to sensor performance modeling. (Author)