DETERMINATION OF IONOSPHERE PARAMETERS BY MEANS OF A SATELLITE ANTENNA-TYPE PROBE. III. PERTURBATION ANALYSIS AND ADMITTANCE MEASUREMENT SYSTEM

Abstract

A spherical antenna-type probe was analyzed for use in determining the parameters of the ionosphere by means of the reaction of the medium on the antenna admittance. The effect of theANISOTROPY OF THE MEDIUM WHICH IS PRODUCED BY THE EARTH'S MAGNETIC FIELD IS EVALUATED BY A PERTURBATION TECHNIQUE. This is accomplished by separating the the conductivity tensor into a scalar plus an anisotropic part, both of which depend on the terrestrial magnetic field. The integral equation which results from a Green's function solution is approximated by the isotropic Green's function. With this approximation, it is possible to carry out all the necessary integrations to obtain the field components. The input admittance then can be evaluated in terms of known functions. A system proposed for the measurement of input admittance was refined by the application of single sideband modulation techniques. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jun 30, 1961
Accession Number
AD0263267

Entities

People

  • E.a. Wolff
  • M. Katzin
  • W.w. Zachary

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Amplitude Modulation
  • Antennas
  • Equations
  • Integral Equations
  • Ionosphere
  • Magnetic Fields
  • Measurement
  • Modulation
  • Perturbations
  • Satellite Antennas
  • Single Sideband Modulation

Fields of Study

  • Physics

Readers

  • Electromagnetic Wave Scattering and Antenna Radiation Engineering

Technology Areas

  • Space