520 



Observed shape Shape u«.ing 7 harmonic 



coefficients only 



R'430K)?8 P,(cos0)-I82 P, (cos 0) 

 -Kl ^9 PjCcos O) -O 29 P» (cos e) 

 -O 61 Pj (cos e)+0 51 P, (cos e) 



6 COMPARISON or OBSERVED BUBBLE SHAPE AND 

 BEST FITTING CURVE USING 7 HARMONIC 

 COEFFICIENTS ONLY 



