EFFECT OF THE SUN UPON ANTENNA TEMPERATURE

Abstract

This report presents results of a study on com putations by means of analytical models of the quiet sun and, from measurements of its flux density, the effect of solar radiation upon an tenna noise temperature. The spatial and spectral properties of solar radio noise are described, and brightness temperature distributions over the sun at several frequencies are presented. The method by which antenna temperature is evaluated, using the Philco 2000 computer, is discussed. The computations are systematized, integrated, and compared with antenna temperatures contributed by other extraterrestrial sources. In addition, the effect of the earth's atmosphere and ground on the total noise temperature is determined. These results are used to calculate the variation of carrier-to-noise ratio as an antenna scans toward the sun while receiving signals from a deep-space probe and from a random-orbit satellite.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1963
Accession Number
AD0410218

Entities

People

  • Albert R. Giddis

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Artificial Satellites
  • Atmospheric Attenuation
  • Bandwidth
  • Computer Programs
  • Coordinate Systems
  • Electrons
  • Geosynchronous Satellites
  • Ground Stations
  • Observatories
  • Solar Activity
  • Solar Probes
  • Solar Radiation
  • Space Probes
  • Space Stations
  • Spacecraft
  • Spacecraft Antennas
  • Systems Engineering

Fields of Study

  • Physics

Readers

  • Acoustics.
  • Astronomy and Astrophysics.
  • Atmospheric Remote Sensing.

Technology Areas

  • Space
  • Space - Hall-Effect Thruster