y = SS+tan8x—— —— 
=-—=*+tan§ x -— 
y 2 il | K= x, 
241%, Ow 2uiX, , Dw 
-D 2S SS peel =o 
joo =u ! gcos@, 2 gcos0, 2 
gcosO(t+2") 
> ¢ a 
yay 2 
ye eyo 
Fig!8. The Quarter Power Boundaries of the Envelope of 
the Solution. The heavy lines are the boundaries.. The 
dashed lines are portions of the equations of the 
boundaries. The wave crests are shown in the xy plane. 
! 
eG o0s8Dw _gcos6;Dw 
—-202- 
