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Title: DIURNAL AND SEASONAL VARIATIONS IN D -REGION ELECTRON DENSITIES DERIVED FROM OBSERVATIONS OF CROSS MODULATION

Abstract

Pulsed cross modulation, arising in the region from 80 to 80 km, was observed during undisturbed days in the spring, summer, and fall of 1960. The manner in which these observations are obtained and the uncertainties associated with the electron-density profiles determined from them are discussed. Average electron-density profiles for each hour of quiet spring days are deduced. These show that the most rapid changed in electron density occur within one hour of ground sunrise and sunset. Around sunrise a rather uaiform layer of about 100 electrons/cc is created almost simultaneously throughout the entire region from 60 to 80 km. As the day progresses, the average electron density between 70 and 80 km changes by a factor of about 10, while the average density between 60 and 70 km changes by only a factor of 2. These features of the D region are discussed in the light of theoretical predictions, which assume that cosmic rays and solar Lyman-alpha radiation account for the normal ionization in this region. (auth)

Authors:
; ;
Publication Date:
Research Org.:
Norwegian Defence Research Establishment, Kjeller, Norway
Sponsoring Org.:
USDOE
OSTI Identifier:
4738101
NSA Number:
NSA-17-013300
Resource Type:
Journal Article
Journal Name:
Canadian Journal of Physics
Additional Journal Information:
Journal Volume: 41; Journal Issue: 2; Other Information: Orig. Receipt Date: 31-DEC-63; Journal ID: ISSN 0008-4204
Publisher:
Canadian Science Publishing
Country of Publication:
Country unknown/Code not available
Language:
English
Subject:
PHYSICS; COSMIC RADIATION; D-LAYER; DENSITY; DISTRIBUTION; DIURNAL VARIATION; ELECTRONS; GEOPHYSICS; IONIZATION; IONOSPHERE; LEVELS; LIGHT; MEASURED VALUES; MODULATION; RADIO WAVES; SEASONAL VARIATIONS; SUN; VARIATIONS

Citation Formats

Barrington, R. E., Thrane, E. V., and Bjelland, B. DIURNAL AND SEASONAL VARIATIONS IN D -REGION ELECTRON DENSITIES DERIVED FROM OBSERVATIONS OF CROSS MODULATION. Country unknown/Code not available: N. p., 1963. Web. doi:10.1139/p63-033.
Barrington, R. E., Thrane, E. V., & Bjelland, B. DIURNAL AND SEASONAL VARIATIONS IN D -REGION ELECTRON DENSITIES DERIVED FROM OBSERVATIONS OF CROSS MODULATION. Country unknown/Code not available. doi:10.1139/p63-033.
Barrington, R. E., Thrane, E. V., and Bjelland, B. Fri . "DIURNAL AND SEASONAL VARIATIONS IN D -REGION ELECTRON DENSITIES DERIVED FROM OBSERVATIONS OF CROSS MODULATION". Country unknown/Code not available. doi:10.1139/p63-033.
@article{osti_4738101,
title = {DIURNAL AND SEASONAL VARIATIONS IN D -REGION ELECTRON DENSITIES DERIVED FROM OBSERVATIONS OF CROSS MODULATION},
author = {Barrington, R. E. and Thrane, E. V. and Bjelland, B.},
abstractNote = {Pulsed cross modulation, arising in the region from 80 to 80 km, was observed during undisturbed days in the spring, summer, and fall of 1960. The manner in which these observations are obtained and the uncertainties associated with the electron-density profiles determined from them are discussed. Average electron-density profiles for each hour of quiet spring days are deduced. These show that the most rapid changed in electron density occur within one hour of ground sunrise and sunset. Around sunrise a rather uaiform layer of about 100 electrons/cc is created almost simultaneously throughout the entire region from 60 to 80 km. As the day progresses, the average electron density between 70 and 80 km changes by a factor of about 10, while the average density between 60 and 70 km changes by only a factor of 2. These features of the D region are discussed in the light of theoretical predictions, which assume that cosmic rays and solar Lyman-alpha radiation account for the normal ionization in this region. (auth)},
doi = {10.1139/p63-033},
journal = {Canadian Journal of Physics},
issn = {0008-4204},
number = 2,
volume = 41,
place = {Country unknown/Code not available},
year = {1963},
month = {2}
}