III. Positive ion chemistry.
Positive Ion Mass Spectrometer Observations in the E Region
Article first published online: 7 DEC 2012
Copyright 1972 by the American Geophysical Union.
Volume 7, Issue 1, pages 99–101, January 1972
How to Cite
1972), Positive Ion Mass Spectrometer Observations in the E Region, Radio Sci., 7(1), 99–101, doi:10.1029/RS007i001p00099.(
- Issue published online: 7 DEC 2012
- Article first published online: 7 DEC 2012
- Manuscript Received: 8 JUL 1971
Positive ion mass spectrometer observations of the auroral zone ionosphere above Fort Churchill and the midlatitude ionosphere above White Sands are reviewed. The auroral zone ionosphere, either day or night, resembles the midlatitude daytime ionosphere. Decay of the ionosphere at sunset and into the night is seen from measurements made above White Sands. The midlatitude nighttime ionosphere in the E region is sustained at an ion density of about 103 ions/cm3 by resonantly scattered ionizing solar radiation. Sporadic-E events are seen as concentration of metallic atomic ions, primarily of Mg+ and Fe+.