Other
Scientific paper
Jan 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976p%26ss...24...25w&link_type=abstract
Planetary and Space Science, vol. 24, Jan. 1976, p. 25-32.
Other
3
F Region, Ionospheric Electron Density, Polar Regions, Satellite Observation, Upper Ionosphere, Alouette 2 Satellite, Electric Fields, Electron Density Profiles, Electron Energy, Isis Satellites, Magnetometers, Spectroscopic Analysis
Scientific paper
This paper presents a picture of the north polar F layer and topside ionosphere obtained primarily from three satellites (Alouette 2, ISIS 1, ISIS 2) that passed over the region within a time interval of about 50 min on a magnetically quiet day. The horizontal distribution of electron densities at the peak of the F layer is found to be similar to synoptic results from the IGY. Energetic-particle and ionospheric-plasma data are also presented, and the F-layer data are discussed in terms of these measurements as well as in terms of electric-field and neutral N2 density measurements made by other satellites on other occasions. The major feature observed is a tongue of F-region ionization extending from the dayside across the polar cap, which is accounted for by antisunward drift due to magnetospheric convection. In the F layer and topside ionosphere, the main effect of auroral precipitation appears to be heating and expansion of the topside. A region of low F-layer density appears on the morning side of the polar cap, which may be due to convection and possibly also to enhanced N2 densities.
Brace Larry H.
Burrows J. R.
David Winningham J.
Dodson Helen W.
Maier E. J.
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