| Autor: |
Gonzales, S. A., Fejer, Bela G., Heelis, R. A., Hanson, W. B. |
| Rok vydání: |
1992 |
| Předmět: |
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| Zdroj: |
Bela G. Fejer |
| Popis: |
We have used observations from both the Bennett ion mass spectrometer and the retarding potential analyzer on board the Atmosphere Explorer E satellite to study the longitudinally averaged O+, H+, and He+ concentrations from 150 to 1100 km in the equatorial ionosphere during the 1975–1976 solar minimum. Our results suggest that the ion mass spectrometer measurements need to be increased by a factor of 2.15 to agree with the densities from the retarding potential analyzer and with ground-based measurements. The peak H+ concentrations are about 2.5×104 cm−3 during the day and 104 cm−3 at night and vary little with season. The O+/H+ transition altitude lies between 750 and 825 km during the day and between 550 and 600 km at night. He+ is a minor species at all altitudes; its concentration is highly variable with a maximum value of about 103 cm−3 during equinox daytime. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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