10' 

 5 



2 



10' 

 5 



2 - 



10' 

 5 



2 - 



10' 

 5 



2 



10' 

 5 



2 - 



10" 



\ 



1 1 T 



Error Spectrum 

 . Sea State 



Ill 1 



- 



- 



\ 



Wave Spectrum 

 -~->^ Sea State 



- 



\ 





\9 







\7 V 



\ 







5 \/ \ 



^^\ 





- 





\ \ 



^ 



- 





^ 



\ 



- 



1 1 ! 



/ i t 1 \ \ 



- 



0.1 0.2 0.4 0.6 0.8 1.0 



Angular Frequency ( Radians / Sec) 



I I I I I I I 



40 30 20 15 12 10 8 

 Wave Period (Seconds) 



Figure 6 - Neumann Wave Spectra and Corresponding Error Spectra 

 for Buoy with Unstabilized Accelerometer 



22 



