Accession Number : AD0288924

Title :   H-F PROPAGATION SIMULATION

Corporate Author : ROME AIR DEVELOPMENT CENTER GRIFFISS AFB N Y

Personal Author(s) : MATHER,R. ; WILSON,F.

Report Date : NOV 1962

Pagination or Media Count : 1

Abstract : An experiment is described in which high frequency electromagnetic wave propagation is to be simulated on an analog computer and compared with experi ental data collected over a 3800-km path. The experimental complex consists of a transmitter site located in the Panama Canal Zone and a receiver site at Stockbridge, NY. Vertical ionospheric sounders are located along the transmission path and are used to measure the spatial distribution of electron density in the volume of interest. A method is described whereby this spatial distribution of electron density is programmed into the analog computer in order that the Hamiltonian equations describing ray paths may be solved. In addition to producing frequency vs time plots for comparison with the experimental data, the simulator also gives results not easily measured in the field, such as take-off angle, angle of arrival, group time, phase time, off-path deviation, and height of reflection. An alternate use for the simulator is also presented. By rescaling the problem and making use of its capability to generate functions of three variables, one can examine the effects of smallscale irregularities of ionization on electromagnetic waves. (Author)

Descriptors :   *ECHO RANGING, *ELECTROMAGNETIC RADIATION, *IONOSPHERIC PROPAGATION, ANALOG COMPUTERS, DENSITY, ELECTRONS, HIGH FREQUENCY, PARTIAL DIFFERENTIAL EQUATIONS, WAVE PROPAGATION

Distribution Statement : APPROVED FOR PUBLIC RELEASE