IONIZATION GROWTH AT SUNRISE IN THE E-F REGION OF THE IONOSPHERE.

Abstract

Ionograms, recorded near sunrise using a Cossor ionosonde with an array of 40 dipoles for 1.515 Mc/s, the gyro-frequency in the lower E-region, show increased group retardation of extraordinary F-echoes at frequencies near 2 Mc/s commencing when the sun's zenith angle is between 96 degrees and 98 degrees. This is followed by the appearance of stratifications in the E-F region. There is good agreement in the sunrise period between the observed ionization growth and that calculated for the solar radiations 911-1027 A and 10-170 A, which produce their maximum photoionization of O2 during the day at the peak of the E-region. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jun 24, 1964
Accession Number
AD0609979

Entities

People

  • C. S. G. K. Setty
  • I. A. Bourne
  • R. A. Smith

Organizations

  • University of New England

Tags

DTIC Thesaurus Topics

  • Agreements
  • Atmosphere (Earth)
  • Biological Phenomena
  • Ecological And Environmental Phenomena
  • Environment
  • Frequency
  • Ionization
  • Ionizing Radiation
  • Ionograms
  • Ionosondes
  • Ionosphere
  • Photoionization
  • Radiation
  • Retardation
  • Solar Radiation

Fields of Study

  • Physics

Readers

  • Space/Atmospheric Physics.