25 
7 
an T=20 
T1469 
x=1.18km 
t= O18 hr. 
FIG.4 
FORM OF THE FINITE 
WAVE GROUP AS A 
FUNCTION OF TIME WHEN 
IT PASSES VARIOUS 
POINTS. o= Yoo T=20 
45t 
25) 
Ve2O 
o=Voo 
x =4.96km. 
thee | tg = Ihr. 
15 9 
20 
