1968
DOI: 10.1016/0021-9169(68)90047-0
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Measurements of D-region electron densities during the international quiet sun years

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1969
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Cited by 50 publications
(8 citation statements)
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“…Using these production rates and basically the reaction rates and values of negative ion-to-electron density ratio, given by Adams and Megill [1967], we computed the electron density profiles given in Figure 3 for several stellar zenith angles (Z). These nighttime electron density profiles, together with any reasonable daytime profile [Belrose and Bourne, 1967;Thrane et al, 1968;Nicolet and/liken, 1960], when used to calculate VLF propagation characteristics [Wait and Spies, 1964], give results that are in reasonable agreement with the experimental measurements of diurnal phase and amplitude at Tucuman. The simulated flare profile (Ioo x 100) gives results that agree with the smaller NPA's shown in Figure 9.…”
mentioning
confidence: 69%
“…Using these production rates and basically the reaction rates and values of negative ion-to-electron density ratio, given by Adams and Megill [1967], we computed the electron density profiles given in Figure 3 for several stellar zenith angles (Z). These nighttime electron density profiles, together with any reasonable daytime profile [Belrose and Bourne, 1967;Thrane et al, 1968;Nicolet and/liken, 1960], when used to calculate VLF propagation characteristics [Wait and Spies, 1964], give results that are in reasonable agreement with the experimental measurements of diurnal phase and amplitude at Tucuman. The simulated flare profile (Ioo x 100) gives results that agree with the smaller NPA's shown in Figure 9.…”
mentioning
confidence: 69%
“…Though this ionization, as has been shown by MoLER (1960) and confirmed by various workers experiences very little diurnal variation, recent cross-modulation experiments (THRANE et al, 1968) shows significant diurnal variation in the D-or C-layer,which cannot be accounted for by the photo-detachment theory alone and associative detachment (FEHSENFELD et al, 1967) is now believed to be a faster process than the photo-detachment of various negative ions.…”
Section: Introductionmentioning
confidence: 75%
“…Although measurements of D region electron concentrations between 65 and 90 km generally indicate strong solar control, asymmetries about noon of order 10-30% are often observed. For instance, mid-latitude observations at Ottawa (45øN) reported by Coyne and Belrose [1972] indicate higher electron densities after noon, whereas at Tsumeb (19øS), higher electron densities before noon are often observed [Thrane et al, 1968]. At Urbana, Illinois [Weiland et al, 1981], asymmetries in the diurnal behavior are also observed with a tendency for higher electron densities in the morning.…”
Section: Introductionmentioning
confidence: 99%