CHECKS ON ACCURACY 



Comparisons were made for those portions of the present tables which overlap with the 

 tables given in Report 687. The maximum difference in any of the functions t, a, f, and rj is 

 0.0001. Only a few points failed to satisfy the tolerance test | t - 1 ± fa - wh\ < 0.00001.* 

 These points occured in the tables for the critical angles (ji = 1, 2, and 3 degrees. Even 

 here, the maximum value of | t - 1 ± /a - wh\ is always less than 0.00005. It is believed that 

 the maximum error in any of the tabulated values is never greater than one unit in the least 

 significant figure. 



*The sign of the +(7 term must be appropriately chosen. See TMB Report 687, Equations [l7], [is], and [19]. 



