REFRACTION OF RADIO RAYS 



167 



40 



36 



32 



28 



E 24 



- 20 



D 



^ 16 



12 

 81- 



4 - 



A(h,3l3) 



SAN JUAN, W.I. 

 (July Average) 



'A(h,3l3) 

 = 3/3 



''313-^ 



Bn=0 



310 320 330 340 350 360 370 380 390 

 A(h, 313), N UNITS 



I \ \ L \ \ \ I 



-8 



■6 -5 -4 -3 -2 -I 



T313-T (mrad) 







Figure 4.57. Comparison of A(h,313) profiles with departures from normal hendirig 



of radio waves for maritime tropical air. 



After Byers [1944]. 



