Contrasting O/X-mode Heater Effects on O-Mode Sounding echo and the Generation of Magnetic Pulsations

Abstract

The effects on the ionosphere of powerful O-mode and X-mode pump waves, modulated 3 minutes on and 1 minute off, were explored. The experiments were monitored using the digisonde and magnetometer located at the HAARP facility. The results show that the virtual heights of the O-mode sounding echoes shifted down/up as the O/X mode heater was turned on; the ionosphere also moved downward/upward accordingly. Enhanced spread-f was also observed in O-mode heater-on periods. Heater-induced magnetic pulsation was observed. Its intensity increased progressively in the heater on/off sequence and X-mode heater was more effective than O-mode heater in the generation of magnetic pulsation. In the last X-mode heater-on period, when the magnetic pulsation reached the highest level, pc 3 pulsations, with increasing intensity, were also observed.

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Document Details

Document Type
Technical Report
Publication Date
Jan 06, 2010
Accession Number
ADA513500

Entities

People

  • Arnold Snyder
  • James Battis
  • Paul Kossey
  • S. P. Kuo
  • Wei-te Cheng

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Force
  • Air Force Research Laboratories
  • Circular Polarization
  • Demographic Cohorts
  • Detection
  • Frequency
  • Frequency Bands
  • Instability
  • Intensity
  • Ionograms
  • Ionosphere
  • Magnetic Fields
  • Magnetometers
  • Military Research
  • New York
  • Parametric Instability
  • Sequences

Fields of Study

  • Physics

Readers

  • Mathematics or Statistics
  • Space/Atmospheric Physics.