Abstract
This paper presents conclusions and recommendations on the interpretation of data gathered from teleradiometers. As part of Project VIEW (Visibility Investigation Experiment in the West), multiwavelength teleradiometers were used to measure apparent target contrast in 14 southwestern national parks and monuments. Statistical results show that the accurate measurement of visual ranges by teleradiometer in an atmosphere containing significant amounts of aerosol depends on observer-target distance and observation angle, and in clean atmospheres on inherent contrast. Target illumination, sun angle, and mean altitude of the sight path may also affect visual range. The relative contribution of each of these factors to the variance in calculated visual range at different sites as a function of air pollution levels is examined through the use of principal component and regression analysis.
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