The Development of a Tactical Dual-Wavelength Nephelometer.

摘要

A prototype dual-wavelength nephelometer operating at 0.55 micron and 2.5 micron was designed and fabricated. Limited testing was conducted in an environmental test chamber. The ultimate goal is to utilize these nephelometric measurements to infer atmospheric attenuation in the 8-12 micron region; preliminary attempts using available models and some published field-test data were made to develop algorithms for this purpose. However, the general unavailability of adequate atmospheric data bases containing extinction and scattering coefficients at the wavelengths of interest prevents definitive conclusions to be made. In addition, until field tests of the nephelometer are made, a complete evaluation of the nephelometer itself cannot be forthcoming. (Author)