VISIBILITY AND TELEPHOTOMETER
Mao Jietai Li Jianguo (Department of Geophysics, Beijing University)
In this paper, the error in estimating the atmospheric extinction coefficient from the observed data of visibility in terms of Koschmieder visibility formula has been discussed. It has been shown that the extinction coefficient may be overestimated about 10% owing to the non-black body targets. This error can be reduced by using a telephotometer. But the error caused by the inhomogeneous scattering of the atmosphere is hardly to be eliminated.