MEASUREMENTS OF ELECTRON CONTENT AND LATITUDINAL F-LAYER CRITICAL FREQUENCY NEAR THE MAGNETIC EQUATOR

Abstract

Faraday rotation data from Satellite S-66 were accumulated at the Electronics Laboratory of the Military Research and Development Center, Bangkok, Thailand from November 1964 through June 1967, a period of intermediate sunspot number (sunspot minimum condition at 1964/1965 and sunspot maximum condition at 1968/1969). These data provide a means of improving ionospheric frequency predictions for regions in Thailand remote from Bangkok (i.e., where no ionosonde data are available). In this report, two methods of analysis-- involving rotation rate and total number of rotations--are applied to the Bangkok observations. The rotation-rate method is used to determine the electron content when the angle between the ray path and geomagnetic field is 90 degrees (transverse position). The total-rotations method is used to determine latitudinal variations of electron content of the equatorial ionosphere for the selected passes from a joint analysis of observations at three stations in Thailand--Songkhla, Bangkok, and Chiengmai. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1967
Accession Number
AD0675461

Entities

People

  • Vichai T. Nimit

Organizations

  • SRI International

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Computer Programs
  • Diurnal Variations
  • Electron Density
  • Electronics Laboratories
  • Electrons
  • Ground Stations
  • Ionosphere
  • Magnetic Fields
  • Measurement
  • Military Research
  • Observation
  • Radio Communications
  • Radio Equipment
  • Seasonal Variations
  • Solar Activity
  • Southeast Asia
  • Thailand

Readers

  • Space/Atmospheric Physics.
  • Technical Research and Report Writing.

Technology Areas

  • Microelectronics
  • Space