474 Table 160 (continued) 



HORIZONTAL VISIBILITY 



Table 160-C2. — Visual range of point sources of light 

 Function (aD -f- 2 log e D) 

 range Extinction coefficient, a, km.- 1 



km. 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 



0.004 

 0.005 

 0.006 



0.007 -9.924 -9.923 -9.922 -9.922 -9.921 -9.920 -9.920 -9.919 -9.918 -9.917 

 0.008 -9.657 -9.656 -9.655 -9.654 -9.653 -9.653 -9.652 -9.651 -9.650 -9.649 



0.009 -9.421 -9.420 -9.419 -9.418 -9.418 -9.417 -9.416 -9.415 -9.414 -9.413 



0.01 -9.210 -9.209 -9.208 -9.207 -9.206 -9.205 -9.204 -9.203 -9.202 -9.201 



0.02 -7.824 -7.822 -7.820 -7.818 -7.816 -7.814 -7.812 -7.810 -7.808 -7.806 



0.03 -7.013 -7.010 -7.007 -7.004 -7.001 -6.998 -6.995 -6.992 -6.989 -6.986 



0.04 -6.438 -6.434 -6.430 -6.426 -6.422 -6.418 -6.414 -6.410 -6.406 -6.402 



0.05 -5.991 -5.986 -5.981 -5.976 -5.971 -5.966 -5.961 -5.956 -5.951 -5.946 



0.06 -5.627 -5.621 -5.615 -5.609 -5.603 -5.597 -5.591 -5.585 -5.579 -5.573 



0.07 -5.319 -5.312 -5.305 -5.298 -5.291 -5.284 -5.277 -5.270 -5.263 -5.256 



0.08 -5.051 -5.043 -5.035 -5.027 -5.019 -5.011 -5.003 -4.995 -4.987 -4.979 



0.09 -4.816 -4.807 -4.798 -4.789 -4.780 -4.771 -4.762 -4.753 -4.744 -4.735 



0.1 -4.605 -4.595 -4.585 -4.575 -4.565 -4.555 -4.545 -4.535 -4.525 -4.515 



0.2 -3.219 -3.199 -3.179 -3.159 -3.139 -3.119 -3.099 -3.079 -3.059 -3.039 



0.3 -2.408 -2.378 -2.348 -2.318 -2.288 -2.258 -2.228 -2.198 -2.168 -2.138 



0.4 -1.833 -1.793 -1.753 -1.713 -1.673 -1.633 -1.593 -1.553 -1.513 -1.473 



0.5 -1.386 -1.336 -1.286 -1.236 -1.186 -1.136 -1.086 -1.036 -0.986 -0.936 



0.6 -1.022 -0.962 -0.902 -0.842 -0.782 -0.722 -0.662 -0.602 -0.542 -0.482 



0.7 -0.713 -0.643 -0.573 -0.503 -0.433 -0.363 -0.293 -0.223 -0.153 -0.083 



0.8 -0.446 -0.366 -0.286 -0.206 -0.126 -0.046 0.034 0.114 0.194 0.274 



0.9 -0.211 -0.121 -0.031 0.059 0.149 0.239 0.329 0.419 0.509 0.599 



1.0 0.000 0.100 0.200 0.300 0.400 0.500 0.600 0.700 0.800 0.900 



1.1 

 1.2 

 1.3 

 1.4 

 1.5 



1.6 

 1.7 

 1.8 

 1.9 

 2.0 



2.1 

 2.2 

 2.3 

 2.4 

 2.5 



2.6 

 2.7 

 2.8 

 2.9 

 3.0 



3.2 

 3.4 

 3.6 

 3.8 

 4.0 



SMITHSONIAN METEOROLOGICAL TABLES 



