INTERPRETATION AND MODELING OF QUASIPERIODIC DIFFRACTION PATTERNS OBSERVED IN EQUATORIAL VHF SCINTILLATION DUE TO PLASMA BUBBLES.

S. J. Franke, C. H. Liu, J. P. McClure

Research output: Contribution to journalArticle

Abstract

Quasiperiodic diffraction patterns have been observed in VHF scintillation recorded at Ascension Island in 1981. The patterns occur most often at the beginning or end of a scintillation patch and are shown to be consistent with those expected from irregularities having east-west scale sizes of a few hundred meters that are associated with the walls (edges) of equatorial plasma bubbles. By adjusting the geophysical parameters in a computer simulation of the amplitude fluctuations expected simultaneously at VHF, L-Band and C-Band, a specific event is modeled in detail. The model contains information on the size and strength of the structures that cause the regular fading patterns. In addition, multi-frequency diffraction patterns are computed for a 'phase screen' model based on high resolution measurements of a structured plasma bubble wall made using the AE-E satellite.

Original languageEnglish (US)
Pages (from-to)10891-10902
Number of pages12
JournalJournal of Geophysical Research
Volume89
Issue numberA12
DOIs
StatePublished - Jan 1 1984

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ASJC Scopus subject areas

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology

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