D-REGION AERONOMICAL CHANGES DEDUCED FROM STEEP INCIDENCE SUNRISE VLF PROPAGATION DATA,

Abstract

Some 12 months of near vertical incidence, mid-latitude VLF data, spanning the period April 1965 through June 1966, have been reduced and analyzed. Analysis of seasonal variations in sky wave amplitude prior to ground sunrise is presented here. These amplitude changes are accounted for in terms of D-region aeronomy variations. It is shown that early morning changes in Lyman-alpha radiation, nitric oxide and atomic oxygen can explain these preground sunrise amplitude effects. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1970
Accession Number
AD0706635

Entities

People

  • Daniel P. Hayes
  • Gary S. Sales

Organizations

  • Lowell Technological Institute

Tags

DTIC Thesaurus Topics

  • Aeronomy
  • Amplitude
  • Electromagnetic Radiation
  • Grids
  • Latitude
  • Radiation
  • Radio Waves
  • Seasonal Variations
  • Sky Waves

Fields of Study

  • Physics

Readers

  • Space/Atmospheric Physics.