For region V, 356 nautical miles ^ S* <_ 452 nautical miles 

 (16 intervals of AS* ) 



|§=1.0 at S^ 



356 nautical miles 



3S£= 2 7 



as* 



at S^ 



452 nautical miles 



S = 356 nautical miles at S* = 356 nautical miles 

 P 



A similar procedure is followed for the expansion function 



T = A + B(T*)^ 



where T is the long wave traveltime (minutes) along the particular 

 isoline of E,. The program assumes that there are, at most, two 

 regions of the expansion curve with the second region being AT = AT*. 

 The expansion coefficients are determined by the program. If the 

 user desires only one region (i.e., T = T* and AT* = total long wave 

 traveltime-number of n grid intervals), the program computes AT*. 



24 



