Visual 

 range 



D 



km. 



4.2 

 4.4 

 4.6 

 4.8 

 5.0 



5.2 

 5.4 

 5.6 

 5.8 

 6.0 



6.2 

 6.4 

 6.6 

 6.8 

 7.0 



7.2 

 7.4 

 7.6 

 7.8 

 8.0 



8.2 

 8.4 

 8.6 

 8.8 

 9.0 



9.2 

 9.4 

 9.6 

 9.8 

 10.0 



11.0 

 12.0 

 13.0 

 14.0 

 15.0 



16.0 

 17.0 

 18.0 

 19.0 

 20.0 



25.0 

 30.0 

 40.0 

 50.0 

 75.0 



100.0 

 150.0 

 200.0 

 250.0 



Table 160 (continued) 

 HORIZONTAL VISIBILITY 



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

 Function (oD + 2 log. D) 

 Extinction coefficient, a, km.- 1 



12 3 4 5 6 7 



477 



4.0 2.773 6.773 10.773 14.773 18.773 22.773 26.773 30.773 



2.870 

 2.963 

 3.052 

 3.137 

 3.219 



3.297 

 3.373 

 3.446 

 3.516 

 3.584 



3.649 

 3.713 

 3.774 

 3.834 

 3.892 



3.948 

 4.003 

 4.056 

 4.108 

 4.159 



4.208 

 4.256 

 4.304 

 4.350 

 4.394 



4.796 

 4.970 

 5.130 

 5.278 

 5.416 



5.545 

 5.666 

 5.781 

 5.889 

 5.991 



7.070 11.270 15.470 19.670 23.870 28.070 32.270 



7.363 11.763 16.163 20.563 24.963 29.363 33.763 



7.652 12.252 16.852 21.452 26.052 30.652 



7.937 12.737 17.537 22.337 27.137 31.937 



8.219 13.219 18.219 23.219 28.219 33.219 



8.497 13.697 18.897 24.097 29.297 34.497 



8.773 14.173 19.573 24.973 30.373 



9.046 14.646 20.246 25.846 31.446 



9.316 15.116 20.916 26.716 32.516 



9.584 15.584 21.584 27.584 33.584 



9.849 

 10.113 

 10.374 

 10.634 

 10.892 



11.148 

 11.403 

 11.656 

 11.908 

 12.159 



12.408 

 12.656 

 12.904 

 13.150 

 13.394 



16.049 

 16.513 

 16.974 

 17.434 

 17.892 



18.348 

 18.803 

 19.256 

 19.708 

 20.159 



20.608 

 21.056 

 21.504 

 21.950 

 22.394 



15.796 

 16.970 

 18.130 

 19.278 

 20.416 



21.545 

 22.666 

 23.781 

 24.889 

 25.991 



26.796 

 28.970 

 31.130 

 33.278 

 35.416 



37.545 

 39.666 

 41.781 

 43.889 

 45.991 



6.438 31.438 



6.802 36.802 



7.378 47.378 



7.824 57.824 



8.635 83.635 



9.210 

 10.021 

 10.597 

 11.043 



22.249 

 22.913 

 23.574 

 24.234 

 24.892 



25.548 

 26.203 

 26.856 

 27.508 

 28.159 



28.808 

 29.456 

 30.104 

 30.750 

 31.394 



28.449 

 29.313 

 30.174 

 31.034 

 31.892 



32.748 

 33.603 

 34.456 

 35.308 

 36.159 



37.008 

 37.856 



34.649 

 35.713 



4.438 13.638 22.838 32.038 



4.481 13.881 23.281 32.681 



4.524 14.124 23.724 33.324 



4.565 14.365 24.165 33.965 



4.605 14.605 24.605 34.605 



37.796 

 40.970 



{continued) 



SMITHSONIAN METEOROLOGICAL TABLES 



