460 



Table 160 (continued) 

 HORIZONTAL VISIBILITY 



Table 160-B1. — Extinction coefficient as a function of visual range of black objects viewed 

 against horizon sky in daytime where threshold of luminance contrast, e, is 0.02 



3.912 



0.00 

 0.01 

 0.02 

 0.03 

 0.04 



0.05 

 0.06 

 0.07 

 0.08 

 0.09 



0.10 

 0.11 

 0.12 

 0.13 

 0.14 



0.15 

 0.16 

 0.17 

 0.18 

 0.19 



0.20 

 0.21 

 0.22 

 0.23 

 0.24 



0.25 

 0.26 

 0.27 

 0.28 

 0.29 



0.30 

 0.31 

 0.32 

 0.33 

 0.34 



0.35 

 0.36 

 0.37 

 0.38 

 0.39 



Tinge °- 000 °- 001 °- 002 °- 003 °- 004 °- 005 °- 006 0>007 0008 °" 009 



km. 



km.- 1 km. -1 km. -1 



391.2 

 195.6 

 130.4 



355.6 

 186.3 

 126.2 



326.0 

 177.8 

 122.2 



km.- 1 



300'.9 

 170.1 

 118.5 



km.- 1 



978.0 

 279.4 

 163.0 

 115.1 



km.- 1 



782.4 

 260.8 

 156.5 

 111.8 



km.- 1 



652.0 

 244.5 

 150.5 

 108.7 



km.- 1 



558.9 

 230.1 

 144.9 

 105.7 



km.- 1 



489.0 

 217.3 

 139.7 

 102.9 



78.24 

 65.20 

 55.89 

 48.90 

 43.47 



39.12 

 35.56 

 32.60 

 30.09 

 27.94 



26.08 

 24.45 

 23.01 

 21.73 

 20.59 



19.56 

 18.63 

 17.78 

 17.01 

 16.30 



15.65 

 15.05 

 14.49 

 13.97 

 13.49 



13.04 

 12.62 

 12.22 

 11.85 

 11.51 



11.18 

 10.87 

 10.57 

 10.29 

 10.03 



76.71 

 64.13 

 55.10 

 48.30 

 42.99 



38.73 

 35.24 

 32.33 

 29.86 

 27.74 



25.91 

 24.30 

 22.88 

 21.61 

 20.48 



19.46 

 18.54 

 17.70 

 16.94 

 16.23 



15.59 

 14.99 

 14.44 

 13.92 

 13.44 



13.00 

 12.58 

 12.19 

 11.82 

 11.47 



11.15 

 10.84 

 10.54 

 10.27 

 10.01 



75.23 

 63.10 

 54.33 

 47.71 

 42.52 



38.35 

 34.93 

 32.07 

 29.64 

 27.55 



25.74 

 24.15 

 22.74 

 21.49 

 20.37 



19.37 



18.45 

 17.62 

 16.86 

 16.17 



15.52 

 14.93 

 14.38 

 13.87 

 13.40 



12.95 

 12.54 

 12.15 

 11.78 

 11.44 



11.11 



10.81 

 10.52 

 10.24 

 9.980 



73.81 

 62.10 

 53.59 

 47.13 

 42.06 



37.98 

 34.62 

 31.80 

 29.41 

 27.36 



25.57 

 24.00 

 22.61 

 21.38 

 20.27 



19.27 

 18.37 

 17.54 

 16.79 

 16.10 



15.46 

 14.87 

 14.33 

 13.82 

 13.35 



12.91 

 12.50 

 12.11 

 11.75 

 11.41 



11.08 

 10.78 

 10.49 

 10.21 

 9.954 



72.44 

 61.12 

 52.86 

 46.57 

 41.62 



37.62 

 34.32 

 31.55 

 29.19 

 27.17 



25.40 

 23.85 

 22.48 

 21.26 

 20.16 



19.18 

 18.28 

 17.46 

 16.72 

 16.03 



15.40 

 14.82 

 14.28 

 13.77 

 13.31 



12.87 

 12.46 

 12.07 

 11.71 

 11.37 



11.05 

 10.75 

 10.46 

 10.19 

 9.929 



71.13 

 60.18 

 52.16 

 46.02 

 41.18 



37.26 

 34.02 

 31.30 

 28.98 

 26.98 



25.24 

 23.71 

 22.35 

 21.15 

 20.06 



19.08 

 18.20 

 17.39 

 16.65 

 15.97 



15.34 

 14.76 

 14.23 

 13.73 

 13.26 



12.83 

 12.42 

 12.04 

 11.68 

 11.34 



11.02 

 10.72 

 10.43 

 10.16 

 9.904 



69.86 

 59.27 

 51.47 

 45.49 

 40.75 



36.91 

 33.72 

 31.05 

 28.76 

 26.79 



25.08 

 23.57 

 22.23 

 21.03 

 19.96 



18.99 

 18.11 

 17.31 

 16.58 

 15.90 



15.28 

 14.71 

 14.17 

 13.68 

 13.22 



12.78 

 12.38 

 12.00 

 11.64 

 11.31 



10.99 

 10.69 

 10.40 

 10.13 

 9.879 



68.63 

 58.39 

 50.81 

 44.97 

 40.33 



36.56 

 33.44 

 30.80 

 28.55 

 26.61 



24.92 

 23.43 

 22.10 

 20.92 

 19.86 



18.90 

 18.03 

 17.23 

 16.51 

 15.84 



15.22 

 14.65 

 14.12 

 13.63 

 13.17 



12.74 

 12.34 

 11.96 

 11.61 

 11.27 



10.96 

 10.66 

 10.38 

 10.11 

 9.854 



km.- 1 



434.7 

 205.9 

 134.9 

 100.3 



97.80 95.41 93.14 90.98 88.91 86.93 85.04 83.23 81.50 79.84 



67.45 

 57.53 

 50.15 

 44.45 

 39.92 



36.22 

 33.15 

 30.56 

 28.35 

 26.43 



24.76 

 23.29 

 21.98 

 20.81 

 19.76 



18.81 

 17.94 

 17.16 

 16.44 

 15.77 



15.16 

 14.60 

 14.07 

 13.58 

 13.13 



12.70 

 12.30 

 11.93 

 11.57 

 11.24 



10.93 

 10.63 

 10.35 

 10.08 

 9.829 



{continued) 



SMITHSONIAN METEOROLOGICAL TABLES 



