PIPN1 DATA: FREQ,THRE(VOLTS)
     26666.7         .358318    
     21333.3         .157744    
     17066.7        5.787060E-02
     13653.3        2.325693E-02
     10922.7        1.769220E-02
     8738.13        1.474350E-02
     6990.50        1.474350E-02
     5592.40        1.474350E-02
     4473.92        2.123064E-02
     3579.13        2.547680E-02
     2863.31        3.668660E-02
     2290.65        4.018810E-02
     1832.52        3.668652E-02
     1466.01        3.668652E-02
     1172.81        4.402380E-02
     938.248        6.339413E-02
     750.599         .109545    
     600.479         .189294    
     480.383         .392519    
     384.306         1.84884    
     307.445         7.94968