SOME CHARACTERISTICS OF A SWEPT FREQUENCY INTERFEROMETER FOR 35-65 MC/S

Abstract

A radio astronomical, swept frequency interferometer was operated to: (1) investigate the ionospheric refraction of radiation in the frequency range 35-65 mc, and its dependence on geometrical and time parameters, and (2) investigate angular scintillations in the same frequency range, and other short-time variations in the refraction angle. A theory of the 3-dimensional (intensity modulated) record of a swept frequency interferometer is discussed. The simple theory assumes a frequency independent interferometer. The more exact theory includes the influence of a frequency dependent hybrid and gives rather complicated equations, which can be solved only in the numerical way. The influence of ground reflections on the observed interference pattern is also discussed. A method of the determination of the ionospheric refraction from swept frequency record is described. (Author)

Document Details

Document Type
Technical Report
Publication Date
Feb 15, 1961
Accession Number
AD0262284

Entities

People

  • Bengt Hultqvist
  • Ludwik Liszka

Tags

DTIC Thesaurus Topics

  • Equations
  • Frequency
  • Intensity
  • Interferometers
  • Mathematics
  • Radiation
  • Reflection
  • Refraction
  • Scintillation
  • Three Dimensional

Fields of Study

  • Physics

Readers

  • Astronomy and Astrophysics.
  • Plasma Physics / Magnetohydrodynamics
  • Radar Systems Engineering.