Time marks (x) are given every 720 hours 
13 
energy density [(cm/a)**2 / cph] 
F1 
record no: a92067 p sornpiing interval = 60.0 minutes 
u-componenl (zonal) v—component (meridionoJ) 
0.001 0.010 0.100 
frequency [cph] 
frequency [cph] 
-1000 -500 0 500 1000 
19. 9.1991 14:00 - 30, 8,1992 6:00 (UTC)