EXPONENTIAL MODEL 



71 



(I) 



24 



22 



20 



18 



< 16 

 Q 

 < 

 DC 



-J 14 



^ 12 



10 



I Washington, D.C. 

 August, 1500 



2 Omaha, Nebr. 

 August, 1500 



3 Santa Maria, Calif 

 August, 1500 



200 



300 



400 



500 



N. 



Figure 3.10. Comparison of j versus Nb as obtained from CRPL reference atmos- 

 pheres — 1958 and 5-year mean radiosonde data for ^o = 0, h — he = 3 km. 



for a small initial elevation angle, do = 0, and a small height increment, 

 h — hs = 3 km, and shows that both reference atmospheres tend to set a 

 lower limit to the bendings. In this case, the exponential reference atmos- 

 phere appears to be in better agreement with the expected long-term 

 mean bendings than does the reference atmosphere. The numbered data 

 points for Washington, D.C, Omaha, Nebr., and Santa Maria, Calif., are 

 of special interest. Washington and Omaha have the only long-term 



