[en] Four occasional measurements of the altitude distribution of the 2796-2803-Å doublet equatorial airglow have been made with the astronomical TD-1A satellite during winter 1973-1974. The observations indicate the presence of layers of Mg[SUP]+[/SUP] ions in the evening twilight F region in the African sector. Horizontal column densities reaching 8×10[SUP]9[/SUP]Mg[SUP]+[/SUP] ions/cm[SUP]2[/SUP] are observed with peak altitudes varying from 230 to 480 km. Steep topside gradients with scale heights of about 5 km are observed on three occasions.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Gérard, Jean-Claude ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)
Monfils, A.
Language :
English
Title :
The Mg II equatorial airglow altitude distribution
Publication date :
01 September 1978
Journal title :
Journal of Geophysical Research
ISSN :
0148-0227
eISSN :
2156-2202
Publisher :
American Geophysical Union (AGU), Washington DC, United States
