The Nighttime Lower Ionosphere.

Abstract

Detailed numerical calculations for the nighttime lower ionosphere are performed to evaluate the quantitative importance of nighttime radiation fields. Models for the intensities of night sky HI 1216, HI 1026, HeI 584, and HeII 304A radiation are presented and the production rates of ion species are calculated. The intensity of the Lyman- and Lyman-radiation fields from terrestrial and extraterrestrial sources is sufficient to maintain the nighttime lower ionosphere at observed electron density levels. Analysis of ion composition data indicates that on winter anomalous days of D-region ionospheric absorption the E-region is substantially depleted of NO molecules. (Author)

Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1974
Accession Number
AD0778997

Entities

People

  • A. W. Ali
  • D. F. Strobel
  • Robert Meier
  • T. P. Coffey
  • T. R. Young

Organizations

  • United States Naval Research Laboratory

Tags

DTIC Thesaurus Topics

  • Absorption
  • Charged Particles
  • Corpuscular Radiation
  • Electron Density
  • Electrons
  • Elementary Fermions
  • Elementary Particles
  • Fermions
  • Intensity
  • Ionizing Radiation
  • Ionosphere
  • Leptons
  • Molecules
  • Nuclear Radiation
  • Production Rate
  • Radiation

Readers

  • Space/Atmospheric Physics.

Technology Areas

  • Microelectronics