100 



T 1 .-4-4 I I I 



1000 m/ 1 t\ 



// \ \ 1 4 



T 1 — I I I I I l| 



T 



INF 



1 



90% CONFIDENCE 



Legend 



d = diurnal frequency 

 i = inertia I frequency 

 s = semidiurnal frequency 



d,i 



I _J_ 



FREQUENCY (cph) 



Figure 10. Energy spectra. Array I 

 20 



