Electron and ion density observations in the D-region during auroral absorption

Jespersen, M.; Petersen, O.; Rybner, J.; Bjelland, B.; Holt, O.; Landmark, B.; Kane, Julius

doi:10.1016/0032-0633(64)90001-7

Cited by 14 publications

(3 citation statements)

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“…Also, the direct measurement of the ionosphere by using sounding rocket is a powerful method (JESPERSEN et al, 1964(JESPERSEN et al, , 1966MECHTLY and SMITH, 1970;SECHRIST, 1970;DERBLOM and LADELL, 1973). The electron density profiles in the ionosphere at mid-latitudes have been investigated by several authors up to the present (MAEDA, 1969(MAEDA, , 1971FERRARO et al, 1974;ROWS, 1974), but there is insufficient data in the high latitude region.…”

Section: Introductionmentioning

confidence: 99%

Relation between lower ionospheric electron density profiles and cosmic noise absorption during auroral zone disturbances.

Miyazaki¹

1975

J. geomagn. geoelec

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Eight rockets among a total of twenty-one rocket experiments by the 12th, 13th and 14th Japanese Antarctic Research Expedition parties were launched during auroral disturbances at night at Syowa Station, Antarctica between 1971 and 1973. The electron density profiles in the lower ionosphere between about 50 km and 130 km under various disturbed conditions were obtained by rocketborne radio frequency probes and electrostatic probes.The collision frequency profile is derived from the electron density profiles and cosmic noise absorption measurements.There exists a maximum absorption layer in the region between 75 km and 85 km, and this location of the layer is not strongly dependent on the magnitude of the ionospheric dis-turbance. An increase in the electron density, especially in the D and E region between about 75 km and 110 km has a good correlation with cosmic noise absorption; the following empirical formulae are obtained from the observational results: , hm-2x+100, where 4n6(cm-3) is the maximum increment of the electron density from the quiet level, hm(km) is the height of the maximum increment of the electron density and x (dB) is the cosmic noise absorption.

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Section: Introductionmentioning

confidence: 99%

Relation between lower ionospheric electron density profiles and cosmic noise absorption during auroral zone disturbances.

Miyazaki¹

1975

J. geomagn. geoelec

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“…In order to simulate lower altitudes, a simple interpolation between the lowest value from Gnanalingam and Kane (1975) and that of Jespersen et al (1964) was made. This is a safe assumption, as the electron densities at these altitudes are several orders of magnitude lower than those found in the D and E regions.…”

Section: Example Electron Density Profilesmentioning

confidence: 99%

Comment on gi-2021-25

Oyama¹

2021

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“…The comparison of several rocket experiments made in different seasons indicate that a seasonal variation in collision frequency may exist (LAGOW et at., 1960;KANE, 1962;JESPERSEN et al, 1963). BELROSE and HEWITT (1964) found, however, no seasonal variation but instead a very good correlation between collisional frequency and solar activity (as manifested by the 2800 Mc/s solar flux).…”

Section: Variations In Collision Frequencymentioning

confidence: 99%

Ionospheric absorption of cosmic radio noise

Hultqvist¹

1966

Space Sci Rev

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The development of the field of study of ionospheric absorption of cosmic radio noise since 1962 is reviewed. Contributions to the basic theory and methods of analysis are first dealt with. News concerning measuring technique are then briefly treated. In the main part of the paper the development of our knowledge of sudden cosmic noise absorption, polar cap absorption, and auroral absorption is reviewed. The emphasis is on the ionospheric effects. The solar disturbances associated with the absorption effects, the propagation of particles from the Sun to the Earth, and other extraterrestrial sides of the story are not treated.

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Electron and ion density observations in the D-region during auroral absorption

Cited by 14 publications

References 1 publication

Relation between lower ionospheric electron density profiles and cosmic noise absorption during auroral zone disturbances.

Relation between lower ionospheric electron density profiles and cosmic noise absorption during auroral zone disturbances.

Comment on gi-2021-25

Ionospheric absorption of cosmic radio noise

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