Accession Number : AD0477155

Title :   A MODIFIED FOCK FUNCTION.

Descriptive Note : Technical rept.,

Corporate Author : MICHIGAN UNIV ANN ARBOR RADIATION LAB

Personal Author(s) : Hong, S. ; Weston, V. H.

Report Date : NOV 1965

Pagination or Media Count : 22

Abstract : When a high frequency plane electromagnetic wave is tangentially incident upon a locally parabolic convex surface, the distribution of the induced current near the shadow boundary is described by the Fock function (Fock, 1946). A modified Fock function is obtained to describe the current distribution on a smooth convex boundary composed of a flat plane smoothly joined to a parabolic cylinder with the join in the penumbra region. Both analytical and numerical methods are used to obtain the modified Fock function which now depends on the distance between the shadow boundary and the flat plane-parabolic cylinder join. The modified Fock function is applied to estimate the backscattering cross section of a cone-sphere. (Author)

Descriptors :   *BACKSCATTERING), (*SPECIAL FUNCTIONS(MATHEMATICAL), (*ELECTROMAGNETIC RADIATION, BACKSCATTERING), DIFFRACTION, DISTRIBUTION FUNCTIONS, ELECTRIC CURRENTS, DISTRIBUTION, INFORMATION THEORY, CONICAL BODIES, SPHERES, INTEGRAL EQUATIONS, SCATTERING, INTEGRAL TRANSFORMS, NUMERICAL METHODS AND PROCEDURES.

Subject Categories : Cybernetics

Distribution Statement : APPROVED FOR PUBLIC RELEASE