Table 1 A comparison with optical refraction given by Allen (AQ3)
Wavelength 0.55mm
Observer Height 0.0 km
Ambient temperature 10degC
pressure 760mmHg
humidity 90%
Refraction from model atmosphere calculations
Zenith Refraction AQ3 Diff
Distance
o " " "
0 0.0 0 0.0
10 10.4 10 0.4
20 21.4 21 0.4
30 33.9 34 -0.1
40 49.2 49 0.2
45 58.7 59 -0.3
50 69.9 70 -0.1
55 83.7 84 -0.3
60 101.4 101 0.4
65 125.3 125 0.3
70 159.9 159 0.9
75 215.7 215 0.7
80 321.4 319 2.4
81 355.1 353 2.1
82 396.0 394 2.0
83 446.7 444 2.7
84 511.1 509 2.1
85 594.9 593 1.9
86 707.9 706 1.9
87 866.1 865 1.1
88 1099.0 1103 -4.0
89 1466.3 1481 -14.7
89.5 1740.7 1760 -19.3