Accession Number : AD0865397

Title :   An Automatic Method for Deducing D-Region Electron Densities from VLF Sounder Data.

Descriptive Note : Technical publication,

Corporate Author : NAVAL WEAPONS CENTER CHINA LAKE CA

Personal Author(s) : Martin, James N.

Report Date : JAN 1970

Pagination or Media Count : 30

Abstract : An automatic method for deducing electron density profiles consistent with experimental VLF-LF sounder data is described. The method uses a function optimization algorithm of Rosenbrock to minimize the differences between calculated and observed VLF-LF reflection coefficients. The calculated values are obtained by a numerical integration of the equations for wave propagation in an inhomogeneous, anisotropic ionosphere, and the experimental data is obtained from the Corona Laboratories' multifrequency, vertical incidence sounder. Numerical results are presented for several test problems and for two sets of real data. (Author)

Descriptors :   *ELECTRON DENSITY), (*RADIO SIGNALS, IONOSPHERIC PROPAGATION), (*ATMOSPHERIC SOUNDING, VERY LOW FREQUENCY, AUTOMATION, OPTIMIZATION, LOW FREQUENCY, CHARGED PARTICLES, COMPUTER PROGRAMMING, INTERACTIONS, MATHEMATICAL ANALYSIS.

Subject Categories : Atmospheric Physics
      Radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE