AMPLITUDE SPECTRUM 



OF 



POINT MASS ANOMALIES 



61 X61 



^ .20- 





F x IN CYCLES PER DATA INTERVAL 



FIGURE 11. THE TWO-DIMENSIONAL FOURIER TRANSFORM OF THE MODEL 

 FIELD FROM LONGITUDE 0' TO 60' AND LATITUDE 10' TO 70' 

 WITH ONE-DATA INTERVAL EQUAL TO ONE MINUTE AND 

 CONTOURS IN NORMALIZED UNITS. 



30 



