COMPUTING THE MODIFIED INDEX OF REFRACTION. M 



87 



Table lOD. u for h from 150 m (492.1 ft) to 500 in (1,640 ft); F from 340 to 420. Values to be subtracted from F to 

 obtain Fp = (n - 1) 10^. 



\F y 



h (m) \ 340 350 360 370 380 390 400 410 420 / h (ft) 



150 

 175 

 200 

 225 

 250 

 275 

 300 

 325 

 350 

 375 

 400 

 425 

 450 

 475 

 500 



492.1 



574.1 



656.2 



738.2 



820.2 



902.2 



984.3 



1,066.0 



1,148.0 



1,2,30.0 



1,312.0 



1,. 394.0 



1,476.0 



1,. 5.58.0 



1,640.0 



Table lOE. u for h from 150 m (492.1 ft) to 500 m (1,640 ft); F from 420 to 500. Values to lie subtracted from F to 

 obtain Fp = (n - 1) 10^. 



\f y 



h (m)\ 420 430 440 450 460 470 480 490 500 y^ h (ft) 



150 

 175 

 200 

 225 

 250 

 275 

 300 

 325 

 350 

 375 

 400 

 425 

 450 

 475 

 500 



492.1 



574.1 



656.2 



738.2 



820.2 



902.2 



984.3 



1,066.0 



1,148.0 



1,230.0 



1,312.0 



1,394.0 



1,476.0 



1,558.0 



1,640.0 



