Accession Number : AD0288113

Title :   A FORTRAN II CODE FOR THE CALCULATION OF ELECTROMAGNETIC BLACKOUT FOLLOWING A HIGH-ALTITUDE NUCLEAR DETONATION

Corporate Author : GENERAL ELECTRIC CO SANTA BARBARA CALIF

Personal Author(s) : FISCHER,P.G. ; CHRISTIAN,R.H. ; HENDRICK,R.W.

Report Date : 29 DEC 1961

Pagination or Media Count : 1

Abstract : A program is considered which computes, as functions of time, altitude, and range, the electron concentration and resulting electromagnetic absorption for specified detonation and debris histories. The computation includes initial ionization due to x rays, gamma rays, neutrons, and debris, as well as delayed ionization due to the continuing beta and gamma radiation from the debris. It computes the transient recombination and quasi-equilibrium solutions for electron concentrations and the incremental electromagnetic wave absorption (decibels/kilometer) at the required altitudes for up to three specified frequencies. From these, the altitudes of specific electron concentration contours are interpolated and the one-way vertical absorption is obtained by trapezoidal integration. The computation is carried out for an atmosphere which approximates the 1959 ARDC atmosphere and includes the curvature of the earth. Atmospheric reaction rates are assumed to be those of the ambient air, except in the close-in, very disturbed regions, where approximate corrections appropriate to early times have been included. (Author)

Descriptors :   *ELECTROMAGNETIC FIELDS, CODING, DIGITAL COMPUTERS, ELECTROMAGNETIC RADIATION, GAMMA RAYS, IONIZATION, NEUTRONS, PROGRAMMING (COMPUTERS), PROGRAMMING LANGUAGES, X RAYS

Distribution Statement : APPROVED FOR PUBLIC RELEASE