Figure 5 . Locus of arguments for which the power series evaluation of the 

 modified Hankel functions gives 12 and 1 1 decimal places of accuracy for 

 a computer word length of 14.4 decimal places. 



Figure 6. Locus of arguments for which the direct and continued fraction 

 evaluation of the asymptotic series gives 1 1 and 12 decimal place accuracy. 

 The arguments at which the modified Hankel functions were evaluated in a 

 typical normal-mode run are shown. 



35 



