A further investigation of the ariel 4 ambient electron densities at vernal equinox

G�l�in Kandemir

doi:10.1007/bf00658045

A further investigation of the ariel 4 ambient electron densities at vernal equinox

Astrophysics and Space Science ◽

10.1007/bf00658045 ◽

1994 ◽

Vol 211 (1) ◽

pp. 93-97 ◽

Cited By ~ 1

Author(s):

G�l�in Kandemir

Keyword(s):

Electron Densities ◽

Vernal Equinox ◽

Ambient Electron

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PMSE observations with the EISCAT VHF- and UHF-radars: Ice particles and their effect on ambient electron densities

Journal of Atmospheric and Solar-Terrestrial Physics ◽

10.1016/j.jastp.2012.10.015 ◽

2013 ◽

Vol 104 ◽

pp. 270-276 ◽

Cited By ~ 5

Author(s):

Qiang Li ◽

Markus Rapp

Keyword(s):

Electron Densities ◽

Ice Particles ◽

Ambient Electron

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Electron Precipitation at an Auroral Latitude – Saskatoon, L = 4.4. II. Fluxes of Precipitating Electrons

Canadian Journal of Physics ◽

10.1139/p74-247 ◽

1974 ◽

Vol 52 (19) ◽

pp. 1879-1884 ◽

Cited By ~ 4

Author(s):

A. H. Manson ◽

Z. M. Khan

Keyword(s):

Ionospheric Disturbance ◽

Differential Absorption ◽

Satellite Measurements ◽

Electron Densities ◽

Characteristic Energy ◽

Mean Values ◽

Absorption Experiment ◽

Ambient Electron ◽

Auroral Latitude ◽

Good Agreement

Measurements of ambient electron densities have been made by the differential absorption experiment, on a number of aurorally disturbed nights in 1971. The measured values of the intensity of the green line (5577 Å) emission, and of the ambient electron densities, are then compared with theoretical estimates of these two variables. An exponential energy spectrum is used in the calculation, and fluxes of precipitated electrons (> 40 keV) and values for the e folding energies (E0) thereby become available. Comparisons of mean values with satellite measurements made under similar magnetic conditions, show good agreement. Calculations are also made for two specific nights, (January 26–28, 1971). Characteristic energies are typically 5 keV during the maximum of the magnetic and photometric disturbances, and increase to values of 10–15 keV near sunrise when the ionospheric disturbance (< 90 km) is greatest. The calculation is shown to be sensitive to changes in characteristic energy of the spectrum.

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