COMPUTING PROGRAMS FOR THE COMPLEX FRESNEL INTEGRAL
NAVAL WEAPONS LAB DAHLGREN VA
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The asymptotic series for the complex Fresnel integral with remainder is used in subroutines to evaluate the conventional Fresnel integrals and the probability integral. A series expansion with improved accuracy of calculation is used to evaluate the remainder. A rational polynomial approximation is developed for the complex Fresnel integral. The range of validity of the rational approximation is that part of the complex plane on the negative side which is bounded by the imaginary axis and is outside a circle of unit radius. The complex Fresnel integral correct to thirteen significant digits is tabulated at unit intervals in the argument.
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