Loveland R B, Lindberg J D
Appl Opt. 1988 Oct 15;27(20):4318-22. doi: 10.1364/AO.27.004318.
During the course of a study of vertical profiles of aerosol properties in low stratus clouds, data were acquired simultaneously with particulate spectrometers and with a visibility meter. Calculations made from the particulate data using Mie theory did not agree with extinction as inferred from the visibility meter data when the aerosol extinction was very high or very low. Several possible explanations for this discrepancy were investigated. It was found that the limited acceptance angle of the visibility meter, a form of integrating nephelometer, can contribute to the problem at high extinction values. In low extinction conditions a peculiarity of the electrooptical design of the particulate spectrometer may cause it to lead to serious errors in estimates of aerosol density.
在一项关于低云层中气溶胶特性垂直剖面的研究过程中，使用颗粒光谱仪和能见度仪同时采集了数据。当气溶胶消光非常高或非常低时，利用米氏理论从颗粒数据进行的计算与从能见度仪数据推断出的消光不一致。对这种差异的几种可能解释进行了研究。结果发现，作为积分浊度计形式的能见度仪的有限接收角，在高消光值时可能导致该问题。在低消光条件下，颗粒光谱仪的电光设计特性可能导致其在气溶胶密度估计中产生严重误差。
