||Telephotometric Study of Baseline Visual Range at Cedar Mountain, Utah, July 7 to August 6, 1978.
Allee, Paul A. ;
Lowery, L. Gwen ;
||National Oceanic and Atmospheric Administration, Boulder, CO. Atmospheric Physics and Chemistry Lab.;Bureau of Land Management, Washington, DC.;Environmental Protection Agency, Washington, DC.
Cedar Mountain ;
Atmospheric attenuation ;
Optical measurement ;
Atmospheric scattering ;
Visual inspection ;
||Some EPA libraries have a fiche copy filed under the call number shown.
Visual range values derived from telephotometric measurements at Cedar Mountain, Emery County, Utah, from July 7 through August 6, 1978, are presented. Concurrent values of visual range were also determined and reported. Comparison of the visual range obtained by the two methods is discussed. After correction of visual range calculations, the photographic values are about 20 percent less than the telephotometric values of visual range. A system of linear corrections of the photographic visual range was devised so that photographic values can be converted to correspond to telephotometric values. Converted values of photographic visual ranges have a smaller standard deviation that of the concurrent telephotometric values, indicating that extremely high and low values of photographic visual range would not be accurately converted to equivalent telephotometric values. Average values of photometric and telephotometric visual ranges would agree within a few percent.