Polynomial Approximations to R0, R1, and R2
The
excellent agreement between the Egan approximation for R1
and the exact values (Table B.4) suggested
making polynomial fits for R0 and R2.
For completeness an expression for R1 is presented also
|
R0(n) = 2.20714n3-11.0303n2+18.44687n-9.50765
|
(B43) |
|
R1(n) = 0.7857n3-4.3259n2+8.26405n-4.71306
|
(B44) |
|
R2(n) = -0.02043n3-0.38418n2+2.01132n-1.62198
|
(B45) |
The
accuracy of these expressions is presented in Table B.5, where
it is apparent that the cubic polynomials generate values of
R1 and R2 accurate to better than 0.005.
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